S-3ASR

As filed with the Securities and Exchange Commission on September 9, 2013

Registration No. 333-          

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-3

REGISTRATION STATEMENT

Under

THE SECURITIES ACT OF 1933

WESTLAKE CHEMICAL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	2801 Post Oak Boulevard, Suite 600 Houston, Texas 77056 (713) 960-9111	76-0346924
(State or other jurisdiction of incorporation or organization)	(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)	(I.R.S. Employer Identification No.)

Stephen Wallace, Esq.

Vice President, General Counsel and Secretary

Westlake Chemical Corporation

2801 Post Oak Boulevard, Suite 600

Houston, Texas 77056

(713) 960-9111

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copy to:

Timothy S. Taylor, Esq.

Baker Botts L.L.P.

910 Louisiana Street

One Shell Plaza

Houston, Texas 77002-4995

(713) 229-1234

Exact Name of Additional Registrants	Jurisdiction of Incorporation/Organization	I.R.S. Employer Identification Number
Geismar Holdings, Inc.	Delaware	33-1036002
GVGP, Inc.	Delaware	71-0921650
North American Pipe Corporation	Delaware	76-0370735
North American Specialty Products LLC	Delaware	46-2429042
Westech Building Products, Inc.	Delaware	76-0498816
Westlake Chemical Investments, Inc.	Delaware	76-0664309
Westlake Development Corporation	Delaware	76-0666307
Westlake Ethylene Pipeline Corporation	Delaware	61-1513966
Westlake Geismar Power Company LLC	Delaware	35-2330798
Westlake Longview Corporation	Delaware	61-1496835
Westlake Management Services, Inc.	Delaware	76-0321065
Westlake NG I Corporation	Delaware	30-0343980
Westlake NG IV Corporation	Delaware	35-2330799
Westlake NG V Corporation	Delaware	35-2330801
Westlake Olefins Corporation	Delaware	52-1629821
Westlake Petrochemicals LLC	Delaware	76-0553330
Westlake Pipeline Investments LLC	Delaware	27-3400646
Westlake Polymers LLC	Delaware	76-0144230
Westlake PVC Corporation	Delaware	76-0346192
Westlake Resources Corporation	Delaware	76-0321064
Westlake Styrene LLC	Delaware	76-0294926
Westlake Supply and Trading Company	Delaware	76-0377613

Westlake Vinyl Corporation	Delaware	76-0414632
Westlake Vinyls Company LP	Delaware	06-1641487
Westlake Vinyls, Inc.	Delaware	76-0542667
WPT LLC	Delaware	76-0469048

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this Registration Statement.

If the only securities being registered on this Form are to be offered pursuant to dividend or interest reinvestment plans, please check the following box:  ¨

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), other than securities offered only in connection with dividend or interest reinvestment plans, check the following box:  x

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ¨

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box:  x

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box:  ¨.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨  (Do not check if a smaller reporting company)	Smaller reporting company	¨

CALCULATION OF REGISTRATION FEE

Title of Each Class of Securities to be Registered	Amount to be Registered/Proposed Maximum Offering Price Per Unit/Proposed Maximum Aggregate Offering Price/Amount of Registration Fee (1)(2)
Debt Securities
Preferred Stock, par value $0.01 per share
Common Stock, par value $0.01 per share
Warrants
Guarantees of Debt Securities (3)
Common Stock, par value $0.01 per share (4)
Total

(1) There is being registered hereunder such indeterminate number or amount of debt securities, preferred stock, common stock, warrants and guarantees as may from time to time be issued at indeterminate prices and as may be issuable upon conversion, redemption, exchange, exercise or settlement of any securities registered hereunder, including under any applicable antidilution provisions. Any securities registered hereunder may be sold separately or as units with other securities registered hereunder or other securities.

(2) In reliance on Rule 456(b) and Rule 457(p) under the Securities Act, Westlake Chemical Corporation hereby defers payment of the registration fee required in connection with this Registration Statement, except for $46,084 of the registration fee previously paid with respect to $1,049,900,000 aggregate initial offering price of securities that were previously registered pursuant to Registration Statement File No. 333-124581 (initially filed by the Registrant on May 3, 2005) and not sold thereunder, which amount was carried forward pursuant to Rule 457(p) to the Registration Statement File No. 333-150206 (initially filed by the Registrant on April 11, 2008) and subsequently carried forward pursuant to Rule 457(p) to the Registration Statement File No. 333-177119 (initially filed by the Registrant on September 30, 2011), may be used to offset future registration fees due under this Registration Statement pursuant to Rule 457(p) of the Securities Act.

(3) Certain subsidiaries of Westlake Chemical Corporation may fully and unconditionally guarantee any series of debt securities of Westlake Chemical Corporation. Pursuant to Rule 457(n) no separate fee is payable with respect to the guarantees of the debt securities being registered.

(4) Represents 4,500,000 shares that may be sold from time to time by the securityholder named herein.

Prospectus

Westlake Chemical Corporation

Debt Securities

Preferred Stock

Common Stock

Warrants

We may issue and sell from time to time:

• our debt securities;

• shares of our common stock;

• shares of our preferred stock;

• warrants to purchase such securities; or

• guarantees of our debt securities.

TTWF LP, our principal stockholder in which three of our directors have indirect ownership interests, may sell from time to time up to 4,500,000 shares of our common stock.

This prospectus provides you with a general description of the securities that may be offered. We will provide the specific terms of the securities in supplements to this prospectus. You should read this prospectus and any supplement carefully before you invest. Our common stock is listed on the New York Stock Exchange under the symbol “WLK.”

Investing in our securities involves risk. You should carefully consider the risk factors described under “Risk Factors” beginning on page 4 of this prospectus before you make any investment in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined whether this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is September 9, 2013.

Table of Contents

About This Prospectus	1
About Westlake Chemical Corporation	2
The Subsidiary Guarantors	3
Risk Factors	4
Cautionary Statements About Forward-Looking Statements	8
Use Of Proceeds	10
Ratio Of Earnings To Fixed Charges	10
Description Of Debt Securities	11
Description Of Capital Stock	22
Description Of Warrants	28
Selling Stockholder	29
Plan Of Distribution	31
Legal Opinions	34
Experts	34
Where You Can Find More Information	34

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement that we have filed with the Securities and Exchange Commission using a “shelf” registration process. Using this process, we and the selling stockholder may sell any combination of the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of the securities that may be offered. Each time securities are to be offered pursuant to this prospectus, we will provide a prospectus supplement and, if applicable, a pricing supplement that will describe the specific terms of that offering. The prospectus supplement and any pricing supplement may also add to, update or change the information contained in this prospectus. Please carefully read this prospectus, the prospectus supplement and any pricing supplement together with the information contained in the documents we refer to under the heading “Where You Can Find More Information.”

You should rely only on the information we have provided or incorporated by reference in this prospectus, the prospectus supplement and any pricing supplement. Neither we nor the selling stockholder have authorized any person, including any salesman or broker, to provide you with additional or different information. We and the selling stockholder are not making an offer of these securities in any jurisdiction where the offer is not permitted. You should assume that the information in this prospectus, the accompanying prospectus supplement and any pricing supplement is accurate only as of the date on its cover page and that any information we have incorporated by reference is accurate only as of the date of the document incorporated by reference.

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ABOUT WESTLAKE CHEMICAL CORPORATION

We are a vertically integrated manufacturer and marketer of basic chemicals, vinyls, polymers and fabricated building products. Our products include some of the most widely used chemicals in the world, which are fundamental to many diverse consumer and industrial markets, including flexible and rigid packaging, automotive products, coatings, residential and commercial construction as well as other durable and non-durable goods. We operate in two principal business segments, Olefins and Vinyls, and we are an integrated producer of vinyls with substantial downstream integration into polyvinyl chloride (“PVC”) building products.

We began operations in 1986 after our first polyethylene plant, an Olefins segment business, near Lake Charles, Louisiana was acquired from Occidental Petroleum Corporation. We began our vinyls operations in 1990 with the acquisition of a vinyl chloride monomer (“VCM”) plant in Calvert City, Kentucky from the Goodrich Corporation. In 1992, we commenced our Vinyls segment building products operations after acquiring three PVC pipe plants. Since 1986, we have grown rapidly into an integrated producer of petrochemicals, polymers and building products. We achieved this by acquiring existing plants or constructing new plants (including our joint venture in China) and completing numerous capacity or production line expansions.

We benefit from highly integrated production facilities that allow us to process raw materials into higher value-added chemicals and building products. As of June 30, 2013, we had 12.3 billion pounds per year of aggregate production capacity at 15 manufacturing sites in North America. We also have a 59% interest in a joint venture in China that operates a vinyls facility.

We are a Delaware corporation with our principal executive offices located at 2801 Post Oak Boulevard, Suite 600, Houston, Texas 77056. Our telephone number at such address is (713) 960-9111.

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THE SUBSIDIARY GUARANTORS

One or more of our following direct or indirect wholly-owned subsidiaries may fully and unconditionally guarantee any series of debt securities offered by this prospectus, as set forth in a related prospectus supplement:

Geismar Holdings, Inc.

GVGP, Inc.

North American Pipe Corporation

North American Specialty Products LLC

Westech Building Products, Inc.

Westlake Chemical Investments, Inc.

Westlake Development Corporation

Westlake Ethylene Pipeline Corporation

Westlake Geismar Power Company LLC

Westlake Longview Corporation

Westlake Management Services, Inc.

Westlake NG I Corporation

Westlake NG IV Corporation

Westlake NG V Corporation

Westlake Olefins Corporation

Westlake Petrochemicals LLC

Westlake Pipeline Investments LLC

Westlake Polymers LLC

Westlake PVC Corporation

Westlake Resources Corporation

Westlake Styrene LLC

Westlake Supply and Trading Company

Westlake Vinyl Corporation

Westlake Vinyls Company LP

Westlake Vinyls, Inc.

WPT LLC

These subsidiaries are sometimes referred to in this prospectus as possible Subsidiary Guarantors. The term “Subsidiary Guarantors” with respect to a series of debt securities refers to those subsidiaries listed above that guarantee that series of debt securities. The applicable prospectus supplement will name the Subsidiary Guarantors, if any, for that series of debt securities and will describe the terms of the guarantee by the Subsidiary Guarantors.

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RISK FACTORS

An investment in our securities involves a high degree of risk. You should carefully consider the risk factors and all of the other information included in, or incorporated by reference into, this prospectus, including those in Item 1A. “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2012 and our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2013, in evaluating an investment in our securities. If any of these risks were to occur, our business, financial condition or results of operations could be adversely affected. In that case, the trading price of our common stock or preferred stock or value of our debt securities could decline and you could lose all or part of your investment. When we offer and sell any securities pursuant to a prospectus supplement, we may include additional risk factors relevant to such securities in the prospectus supplement.

Risks Related to our Principal Stockholder

We will be controlled by our principal stockholder, TTWF LP, and its affiliates as long as they own a majority of our common stock, and our other stockholders will be unable to affect the outcome of stockholder voting during that time. Our interests may conflict with those of the principal stockholder and its affiliates, and we may not be able to resolve these conflicts on terms possible in arms-length transactions.

As long as TTWF LP, which as of September 2, 2013, owns approximately 68.4% of our common stock (the “principal stockholder” or the “selling stockholder”) and its affiliates (the “principal stockholder affiliates”) own a majority of our outstanding common stock, they will be able to exert significant control over us, and our other stockholders, by themselves, will not be able to affect the outcome of any stockholder vote. As a result, the principal stockholder, subject to any fiduciary duty owed to our minority stockholders under Delaware law, will be able to control all matters affecting us (some of which may present conflicts of interest), including:

• the composition of our board of directors and, through the board, any determination with respect to our business direction and policies, including the appointment and removal of officers and the determination of compensation;

• any determinations with respect to mergers or other business combinations or the acquisition or disposition of assets;

• our financing decisions, capital raising activities and the payment of dividends; and

• amendments to our amended and restated certificate of incorporation or amended and restated bylaws.

The principal stockholder will be permitted to transfer a controlling interest in us without being required to offer our other stockholders the ability to participate or realize a premium for their shares of common stock. A sale of a controlling interest to a third party may adversely affect the market price of our common stock and our business and results of operations because the change in control may result in a change of management decisions and business policy. Because we have elected not to be subject to Section 203 of the General Corporation Law of the State of Delaware, the principal stockholder may find it easier to sell its controlling interest to a third party than if we had not so elected. See “Description of Capital Stock—Delaware Business Combination Statute” for a description of Section 203 and the potential positive and negative consequences, depending on the circumstances, of electing not to be subject to it.

In addition to any conflicts of interest that arise in the foregoing areas, our interests may conflict with those of the principal stockholder affiliates in a number of other areas, including:

• business opportunities that may be presented to the principal stockholder affiliates and to our officers and directors associated with the principal stockholder affiliates, and competition between the principal stockholder affiliates and us within the same lines of business;

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• the solicitation and hiring of employees from each other; and

• agreements with the principal stockholder affiliates relating to corporate services that may be material to our business.

We may not be able to resolve any potential conflicts with the principal stockholder affiliates, and even if we do, the resolution may be less favorable than if we were dealing with an unaffiliated party, particularly if the conflicts are resolved while we are controlled by the principal stockholder affiliates. Our amended and restated certificate of incorporation provides that the principal stockholder affiliates have no duty to refrain from engaging in activities or lines of business similar to ours and that the principal stockholder affiliates will not be liable to us or our stockholders for failing to present specified corporate opportunities to us. See “Description of Capital Stock—Transactions and Corporate Opportunities.”

Risks Related to the Common Stock

Substantial sales of our common stock by the principal stockholder or us could cause our stock price to decline and issuances by us may dilute our stockholders’ ownership interest in our company.

We are unable to predict whether significant amounts of our common stock will be sold by the principal stockholder. Any sales of substantial amounts of our common stock in the public market by the principal stockholder or us, or the perception that these sales might occur, could lower the market price of our common stock. Further, if we issue additional equity securities to raise additional capital, our stockholders’ ownership interest in our company may be diluted and the value of their investment may be reduced.

The price of our common stock may be volatile.

The market price of our common stock could be subject to significant fluctuations. Among the factors that could affect our stock price are:

• our operating and financial performance and prospects;

• quarterly variations in the rate of growth of our financial indicators, such as earnings per share, net income and revenues;

• changes in revenue or earnings estimates or publication of research reports by analysts;

• speculation in the press or investment community;

• strategic actions by us or our competitors, such as acquisitions or restructurings;

• sales of our common stock by stockholders;

• actions by institutional investors or by the principal stockholder;

• fluctuations in oil and gas prices;

• general market conditions, including fluctuations in feedstock, energy and commodity prices; and

• U.S. and international economic, legal and regulatory factors unrelated to our performance.

The stock markets in general have experienced extreme volatility in recent years that has at times been unrelated to the operating performance of particular companies. These broad market fluctuations may adversely affect the trading price of our common stock and, as a result, an investment in our common stock.

If we are unable to pay regular dividends on our common stock, our stockholders may not receive funds without selling their common stock.

Shortly following our initial public offering in 2004, we paid our initial regular quarterly dividend of at least $0.02125 per share. We have paid regular quarterly dividends since our initial dividend. On August 23, 2013, our

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board of directors declared a dividend of $0.225 per share payable on September 25, 2013 to our stockholders of record as of the close of business on September 10, 2013. Any payment of future dividends will be at the discretion of our board of directors and will depend on, among other things, our earnings, financial condition, capital requirements, level of indebtedness, statutory and contractual restrictions applying to the payment of dividends, and other considerations that our board of directors deems relevant. The agreements governing our 6 ¹⁄₂% senior notes due 2029, 6 ³⁄₄% senior notes due 2032, each of our series of 6 ¹⁄₂% senior notes due 2035 and our revolving credit facility also include limitations on our payment of dividends. Accordingly, our stockholders may have to sell some or all of their common stock in order to generate cash flow from their investment. Our stockholders may not receive a gain on their investment when they sell their common stock and they may lose the entire amount of the investment.

Provisions in our charter documents or Delaware law may inhibit a takeover, which could adversely affect the value of our common stock.

Our amended and restated certificate of incorporation and amended and restated bylaws, as well as Delaware corporate law, contain provisions that could delay or prevent a change of control or changes in our management that a stockholder might consider favorable. These provisions apply even if the offer may be considered beneficial by some of our stockholders. If a change of control or change in management is delayed or prevented, the market price of our common stock could decline. Please read “Description of Capital Stock” for a description of these provisions.

Risks Related to the Debt Securities

Our holding company structure may affect our ability to make payments on our debt securities. Holders of our debt securities may be structurally subordinated to the creditors of our subsidiaries.

We currently conduct our operations through subsidiaries, and our operating income and cash flow are generated by our subsidiaries. As a result, cash we obtain from our subsidiaries is the principal source of funds necessary to meet our debt service obligations. Contractual provisions or laws, as well as our subsidiaries’ financial condition and operating requirements, may limit our ability to obtain cash from our subsidiaries that we require to pay our debt service obligations, including payments on the debt securities. In addition, holders of the debt securities will have a junior position to the claims of creditors, including trade creditors and tort claimants, of our subsidiaries to the extent that such subsidiaries do not guarantee such debt securities. In the event of a bankruptcy, liquidation or reorganization of any of our non-guarantor subsidiaries, holders of that subsidiary’s indebtedness and its trade creditors will generally be entitled to payment of their claims from the assets of the subsidiary before any assets are made available for distribution to us.

A holder’s right to receive payments on the debt securities is effectively subordinated to the rights of our existing and future secured creditors. Further, the guarantees of the senior debt securities by the Subsidiary Guarantors are effectively subordinated to the guarantors’ existing and future secured indebtedness.

Holders of our secured indebtedness and the secured indebtedness of the Subsidiary Guarantors will have claims that are prior to the claims of holders of the senior debt securities to the extent of the value of the assets securing that other indebtedness. Notably, we and certain of our subsidiaries, including the Subsidiary Guarantors, are parties to a revolving credit facility, which is secured by liens on, among other things, our accounts receivable and inventory. The senior debt securities will be effectively subordinated to that secured indebtedness. In the event of any distribution or payment of our assets in any foreclosure, dissolution, winding-up, liquidation, reorganization or other bankruptcy proceeding, holders of secured indebtedness will have prior claim to our assets that constitute their collateral. Holders of the senior debt securities will participate ratably with all holders of our senior unsecured indebtedness, and potentially with all of our other general creditors, based upon the respective amounts owed to each holder or creditor, in our remaining assets. We may apply

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proceeds of certain asset sales to reduce our secured indebtedness or other secured obligations, but such application will not permanently reduce our ability to incur secured indebtedness and other secured obligations under the indenture in the future. In any of the foregoing events, we cannot assure you that there will be sufficient assets to pay amounts due on the senior debt securities. As a result, holders of the senior debt securities may receive less, ratably, than holders of secured indebtedness.

A holder’s right to receive payments on the debt securities could be adversely affected if any of our non-guarantor subsidiaries declares bankruptcy, liquidates or reorganizes.

Some but not all of our subsidiaries may guarantee the debt securities. In the event of a bankruptcy, liquidation or reorganization of any of our non-guarantor subsidiaries, holders of that subsidiary’s indebtedness and its trade creditors will generally be entitled to payment of their claims from the assets of the subsidiary before any assets are made available for distribution to us.

Federal and state statutes allow courts, under specific circumstances, to void guarantees and require holders of the debt securities to return payments received from guarantors.

Under the federal bankruptcy law and comparable provisions of state fraudulent transfer laws, a guarantee could be voided or claims in respect of a guarantee could be subordinated to all other debts of the applicable guarantor if, among other things, the guarantor, at the time it incurred the indebtedness evidenced by its guarantee, received less than reasonably equivalent value or fair consideration for the incurrence of such guarantee and either:

• was insolvent or rendered insolvent by reason of such incurrence; or

• was engaged or about to engage in a business or transaction for which the guarantor’s remaining assets constituted unreasonably small capital; or

• intended to incur, or believed that it would incur, debts beyond its ability to pay such debts as they mature.

In addition, any payment by that guarantor pursuant to its guarantee could be voided and required to be returned to the guarantor or to a fund for the benefit of the creditors of the guarantor.

The measures of insolvency for purposes of these fraudulent transfer laws will vary depending upon the law applied in any proceeding to determine whether a fraudulent transfer has occurred. Generally, a guarantor would be considered insolvent if, at the relevant time, the sum of its debts and other liabilities, including contingent liabilities, was greater than the sum of its assets at a fair valuation, and a guarantor that was generally not then paying its debts as they became due would be presumed to be insolvent.

We may incur additional debt ranking equal to the debt securities.

If we incur any additional debt that ranks equally with the debt securities, the holders of that debt will be entitled to share ratably with the holders of the debt securities in any proceeds distributed in connection with any insolvency, liquidation, reorganization, dissolution or other winding-up of our company. This may have the effect of reducing the amount of proceeds paid to a holder of debt securities.

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CAUTIONARY STATEMENTS ABOUT FORWARD-LOOKING STATEMENTS

The Private Securities Litigation Reform Act of 1995 provides safe harbor provisions for forward-looking information. Certain of the statements contained in this prospectus are forward-looking statements. All statements, other than statements of historical facts, included in this prospectus that address activities, events or developments that we expect, project, believe or anticipate will or may occur in the future are forward-looking statements. Forward-looking statements can be identified by the use of words such as “believes,” “intends,” “may,” “should,” “could,” “anticipates,” “expected” or comparable terminology, or by discussions of strategies or trends. Although we believe that the expectations reflected in such forward-looking statements are reasonable, we cannot give any assurances that these expectations will prove to be correct. Forward-looking statements relate to matters such as:

• future operating rates, margins, cash flow and demand for our products;

• industry market outlook;

• production capacities;

• our ability to borrow additional funds under our credit facility;

• our ability to meet our liquidity needs;

• our intended quarterly dividends;

• future capacity additions and expansions in the industry;

• timing, funding and results of the expansion and feedstock conversion programs at our Lake Charles and Calvert City complexes;

• timing, funding and results of the planned new chlor-alkali plant in Geismar;

• results of the acquisition of CertainTeed Corporation’s Pipe and Foundation Group business;

• health of our customer base;

• compliance with present and future environmental regulations and costs associated with environmentally related penalties, capital expenditures, remedial actions and proceedings, including any new laws, regulations or treaties that may come into force to limit or control carbon dioxide and other greenhouse gases emissions or to address other issues of climate change;

• the utilization of net operating loss carryforwards;

• effects of pending legal proceedings; and

• timing of and amount of capital expenditures.

We have based these statements on assumptions and analyses in light of our experience and perception of historical trends, current conditions, expected future developments and other factors we believe were appropriate in the circumstances when the statements were made. Forward-looking statements by their nature involve substantial risks and uncertainties that could significantly impact expected results, and actual future results could differ materially from those described in such statements. While it is not possible to identify all factors, we continue to face many risks and uncertainties. Among the factors that could cause actual future results to differ materially are the risks and uncertainties discussed under “Risk Factors” in this prospectus and in our most recent Annual Report on Form 10-K and those described from time to time in our other filings with the SEC including, but not limited to, the following:

• general economic and business conditions;

• the cyclical nature of the chemical industry;

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• the availability, cost and volatility of raw materials and energy;

• uncertainties associated with the United States and worldwide economies, including those due to the political tensions in the Middle East and elsewhere;

• current and potential governmental regulatory actions in the United States and regulatory actions and political unrest in other countries;

• industry production capacity and operating rates;

• the supply/demand balance for our products;

• competitive products and pricing pressures;

• instability in the credit and financial markets;

• access to capital markets;

• terrorist acts;

• operating interruptions (including leaks, explosions, fires, weather-related incidents, mechanical failure, unscheduled downtime, labor difficulties, transportation interruptions, spills and releases and other environmental risks);

• changes in laws or regulations;

• technological developments;

• our ability to implement our business strategies; and

• creditworthiness of our customers.

Many of these factors are beyond our ability to control or predict. Any of the factors, or a combination of these factors, could materially affect our future results of operations and the ultimate accuracy of the forward-looking statements. These forward-looking statements are not guarantees of our future performance, and our actual results and future developments may differ materially from those projected in the forward-looking statements. Management cautions against putting undue reliance on forward-looking statements or projecting any future results based on such statements or present or prior earnings levels. Every forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward-looking statement.

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USE OF PROCEEDS

Unless we inform you otherwise in the applicable prospectus supplement, we expect to use the net proceeds from the sale of securities for general corporate purposes. These purposes may include:

• repayment or refinancing of debt;

• acquisitions;

• working capital;

• capital expenditures; and

• repurchases and redemptions of securities.

Pending any specific application, we may initially invest funds in short-term marketable securities or apply them to the reduction of short-term indebtedness.

We will not receive any proceeds from the sale of any shares of our common stock that may be sold by the selling stockholder.

RATIO OF EARNINGS TO FIXED CHARGES

We have presented in the table below our historical consolidated ratio of earnings to fixed charges for the periods shown.

	Years Ended December 31,											For the Six Months Ended June 30, 2013
	2012		2011		2010		2009		2008
Ratio of earnings to fixed charges		9.9x		7.1x		7.2x		2.5x		—	(1)		14.7x

(1) Earnings for 2008 were insufficient to cover fixed charges by $61.8 million.

We have computed the ratios of earnings to fixed charges by dividing earnings by fixed charges. For this purpose, “earnings” consist of earnings before income taxes plus fixed charges and equity distributions less net capitalized interest and equity investment income. “Fixed charges” consist of interest expense, capitalized interest, amortization of debt issuance costs and that portion of operating lease rental expense (one-third) we have deemed to represent the interest factor of such expense.

No shares of our preferred stock are currently issued or outstanding, therefore no dividends accrued on any shares of our preferred stock for any period presented. Accordingly, the ratio of earnings to combined fixed charges and preferred stock dividends is the same as the ratio of earnings to fixed charges.

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DESCRIPTION OF DEBT SECURITIES

The debt securities covered by this prospectus will be our general unsecured obligations. We will issue senior debt securities under an indenture dated as of January 1, 2006, as amended or supplemented from time to time, between us, the subsidiary guarantors party thereto and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank, National Association), as trustee. We refer to this indenture as the senior indenture. We will issue subordinated debt securities under an indenture to be entered into among us, the possible Subsidiary Guarantors, and a trustee we will name in the prospectus supplement relating to subordinated debt securities. We refer to this indenture as the subordinated indenture. We refer to the senior indenture and the subordinated indenture collectively as the indentures. The indentures are substantially identical, except for provisions relating to subordination.

We have summarized material provisions of the indentures, the debt securities and the guarantees below. This summary is not complete. We have filed the senior indenture and the form of the subordinated indenture with the SEC as exhibits to the registration statement, and you should read the indentures for provisions that may be important to you. Please read “Where You Can Find More Information.”

In this summary description of the debt securities, unless we state otherwise or the context clearly indicates otherwise, all references to “we,” “us,” or “our” refer to Westlake Chemical Corporation only and not to any of its subsidiaries.

General

Neither indenture limits the amount of debt securities that may be issued under that indenture, and neither indenture limits the amount of other unsecured debt or securities that we may issue. We may issue debt securities under the indentures from time to time in one or more series. As of June 30, 2013, $752.9 million of senior debt securities were outstanding under the senior indenture, which includes $248.9 million aggregate principal amount of 3.60% senior notes due 2022, $100.0 million aggregate principal amount of 6 ¹⁄₂% senior notes due 2029, $250.0 million aggregate principal amount of 6 ³⁄₄% senior notes due 2032, $89.0 million aggregate principal amount of 6 ¹⁄₂% senior notes due 2035 and $65.0 million aggregate principal amount of 6 ¹⁄₂% senior notes due 2035 (collectively the “Outstanding Senior Notes”). No securities are outstanding under the subordinated indenture.

We are not obligated to issue all debt securities of one series at the same time and, unless otherwise provided in the applicable prospectus supplement, we may reopen a series, without the consent of the holders of the debt securities of that series, for the issuance of additional debt securities of that series. Additional debt securities of a particular series will have the same terms and conditions as outstanding debt securities of such series, except for the date of original issuance and the offering price and, if applicable, the initial interest payment date and initial interest accrual date, and will be consolidated with, and form a single series with, such outstanding debt securities.

The senior debt securities will constitute our senior unsecured indebtedness and will rank equally in right of payment with all of our other unsecured and unsubordinated debt and senior in right of payment to all of our subordinated indebtedness. The senior debt securities will be effectively subordinated to, and thus have a junior position to, our secured indebtedness with respect to the assets securing that indebtedness. The subordinated debt securities will rank junior to all of our senior indebtedness and may rank equally with or senior to other subordinated indebtedness we may issue from time to time.

We currently conduct our operations through subsidiaries, and our operating income and cash flow are generated by our subsidiaries. As a result, cash we obtain from our subsidiaries is the principal source of funds necessary to meet our debt service obligations. Contractual provisions or laws, as well as our subsidiaries’ financial condition and operating requirements, may limit our ability to obtain cash from our subsidiaries that we require to pay our debt service obligations, including payments on the debt securities. In addition, holders of the debt securities will have a junior position to the claims of creditors, including trade creditors and tort claimants, of our subsidiaries to the extent that such subsidiaries do not guarantee such debt securities.

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Neither indenture contains any covenants or other provisions designed to protect holders of the debt securities in the event we participate in a highly leveraged transaction or upon a change of control. The indentures also do not contain provisions that give holders of the debt securities the right to require us to repurchase their securities in the event of a decline in our credit rating for any reason, including as a result of a takeover, recapitalization or similar restructuring or otherwise.

Ranking

We and certain of our subsidiaries, including the Subsidiary Guarantors, are parties to a revolving credit facility, which is secured by liens on, among other things, our accounts receivable and inventory. The senior debt securities will be effectively subordinated to that secured indebtedness. As of June 30, 2013, we had no outstanding borrowings and outstanding letters of credit totaling $16.9 million under the revolving credit facility. In the event of any distribution or payment of our assets in any foreclosure, dissolution, winding-up, liquidation, reorganization or other bankruptcy proceeding, holders of secured indebtedness will have prior claim to our assets that constitute their collateral. Holders of the senior debt securities will participate ratably with all holders of our senior unsecured indebtedness, and potentially with all of our other general creditors, based upon the respective amounts owed to each holder or creditor, in our remaining assets. See “Risk Factors—Risks Related to the Debt Securities—A holder’s right to receive payments on the debt securities is effectively subordinated to the rights of our existing and future secured creditors. Further, the guarantees of the senior debt securities by the Subsidiary Guarantors are effectively subordinated to the guarantors’ existing and future secured indebtedness.”

The senior debt securities will rank equally with all of our other unsecured and unsubordinated indebtedness and the unsecured and unsubordinated indebtedness of the Subsidiary Guarantors. As of June 30, 2013, we had an aggregate of $763.8 million of unsecured and unsubordinated indebtedness, consisting of the Outstanding Senior Notes and a $10.9 million loan from the proceeds of tax-exempt waste disposal revenue bonds.

Under the subordinated indenture, payment of the principal of and any premium and interest on the subordinated debt securities will generally be subordinated and junior in right of payment to the prior payment in full of all Senior Debt. As of June 30, 2013, we had an aggregate of $763.8 million of Senior Debt.

Terms

The prospectus supplement relating to any series of debt securities being offered will include specific terms relating to the offering. These terms will include some or all of the following:

• whether the debt securities will be senior or subordinated debt securities;

• the title of the debt securities;

• the total principal amount of the debt securities;

• whether we will issue the debt securities in individual certificates to each holder or in the form of temporary or permanent global securities held by a depositary on behalf of holders;

• the date or dates on which the principal of and any premium on the debt securities will be payable;

• any interest rate, the date from which interest will accrue, interest payment dates and record dates for interest payments;

• whether and under what circumstances we will pay any additional amounts with respect to the debt securities;

• whether debt securities are entitled to any guarantee of any Subsidiary Guarantors and the identity of any such Subsidiary Guarantors for that series and the terms of such guarantee if different than those set forth in the applicable indenture;

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• the place or places where payments on the debt securities will be payable;

• any provisions for optional redemption or early repayment;

• any sinking fund or other provisions that would obligate us to redeem, purchase or repay the debt securities;

• the denominations in which we will issue the debt securities if other than $1,000 and integral multiples of $1,000;

• whether payments on the debt securities will be payable in foreign currency or currency unit or another form and whether payments will be payable by reference to any index or formula;

• the portion of the principal amount of the debt securities that will be payable if the maturity is accelerated, if other than the entire principal amount;

• any additional means of defeasance of the debt securities, any additional conditions or limitations to defeasance of the debt securities or any changes to those conditions or limitations;

• any changes or additions to the events of default or covenants described in this prospectus;

• any restrictions or other provisions relating to the transfer or exchange of the debt securities;

• any terms for the conversion or exchange of the debt securities for other securities;

• with respect to the subordinated indenture, any changes to the subordination provisions for the subordinated debt securities; and

• any other terms of the debt securities not inconsistent with the applicable indenture.

We may sell the debt securities at a discount, which may be substantial, below their stated principal amount. These debt securities may bear no interest or interest at a rate that at the time of issuance is below market rates. If we sell these debt securities, we will describe in the prospectus supplement any material United States federal income tax consequences and other special considerations.

If we sell any of the debt securities for any foreign currency or currency unit or if payments on the debt securities are payable in any foreign currency or currency unit, we will describe in the applicable prospectus supplement the restrictions, elections, tax consequences, specific terms and other information relating to those debt securities and the foreign currency or currency unit.

Subordination

Under the subordinated indenture, payment of the principal of and any premium and interest on the subordinated debt securities will generally be subordinated and junior in right of payment to the prior payment in full of all Senior Debt. Unless we inform you otherwise in the applicable prospectus supplement, we may not make any payment of principal of or any premium or interest on the subordinated debt securities if:

• we fail to pay the principal, interest, premium or any other amounts on any Senior Debt when due; or

• we default in performing any other covenant (a “covenant default”) on any Senior Debt that we have designated if the covenant default allows the holders of that Senior Debt to accelerate the maturity of the Senior Debt they hold.

Unless we inform you otherwise in the applicable prospectus supplement, a covenant default will prevent us from paying the subordinated debt securities only for up to 179 days after holders of the designated Senior Debt give the trustee for the subordinated debt securities notice of the covenant default.

The subordination does not affect our obligation, which is absolute and unconditional, to pay, when due, the principal of and any premium and interest on the subordinated debt securities. In addition, the subordination does not prevent the occurrence of any default under the subordinated indenture.

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The subordinated indenture does not limit the amount of Senior Debt that we may incur. As a result of the subordination of the subordinated debt securities, if we become insolvent, holders of subordinated debt securities may receive less on a proportionate basis than other creditors.

Unless we inform you otherwise in the applicable prospectus supplement, “Senior Debt” will mean,

• all indebtedness or obligations for borrowed money;

• all obligations evidenced by notes, bonds, debentures or other similar instruments;

• all obligations in respect of letters of credit or other similar instruments (or reimbursement obligations with respect thereto), other than standby letters of credit, bid or performance bonds and other obligations issued in the ordinary course of business to the extent not drawn or, to the extent drawn, if such drawing is reimbursed not later than the third business day following demand for reimbursement;

• all obligations to pay the deferred and unpaid purchase price of property or services, except trade payables and accrued expenses incurred in the ordinary course of business;

• all capitalized lease obligations;

• all debt of other persons secured by a lien on any asset of ours, whether or not such debt is assumed by us; and

• all debt of other persons guaranteed by us, to the extent of such guarantee;

unless the indebtedness states that it is not senior to the subordinated debt securities or our other junior debt.

Guarantees

Each of the Subsidiary Guarantors, if any, with respect to a series of senior debt securities will fully and unconditionally guarantee on an unsecured basis the full and prompt payment of the principal of and any premium and interest on the debt securities of that series when and as the payment becomes due and payable, whether at maturity or otherwise. As used in this prospectus, the term “Subsidiary Guarantors” with respect to a series of debt securities refers to those subsidiaries listed under “The Subsidiary Guarantors” that guarantee that series of debt securities. The applicable prospectus supplement will name the Subsidiary Guarantors, if any, for that series of debt securities and will describe the terms of the guarantee by the Subsidiary Guarantors if they differ from the terms described in this prospectus. The guarantees provide that in the event of a default in the payment of principal of or any premium or interest on a debt security, the holder of that debt security may institute legal proceedings directly against the Subsidiary Guarantors to enforce the guarantees without first proceeding against us. If senior debt securities are so guaranteed, the guarantees will rank equally with all of the Subsidiary Guarantors’ other unsecured and unsubordinated debt from time to time outstanding and senior to any subordinated debt of the Subsidiary Guarantors. If subordinated debt securities are so guaranteed, the guarantees will be subordinated to all of the Subsidiary Guarantors’ other unsecured and unsubordinated debt from time to time outstanding.

The obligations of each Subsidiary Guarantor under its guarantee of the debt securities will be limited to the maximum amount that will not result in the obligations of the Subsidiary Guarantor under the guarantee constituting a fraudulent conveyance or fraudulent transfer under federal or state law, after giving effect to:

• all other contingent and fixed liabilities of the Subsidiary Guarantor; and

• any collections from or payments made by or on behalf of any other Subsidiary Guarantors in respect of the obligations of the Subsidiary Guarantor under its guarantee.

The guarantee of any Subsidiary Guarantor may be released under certain circumstances. If we exercise our legal or covenant defeasance option with respect to debt securities of a particular series as described below in

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“—Defeasance and Discharge,” then any Subsidiary Guarantor will be released with respect to that series. Further, if no default has occurred and is continuing under the applicable indenture, and to the extent not otherwise prohibited by the applicable indenture, a Subsidiary Guarantor will be unconditionally released and discharged from the guarantee:

• automatically upon any sale, exchange or transfer, whether by way of merger or otherwise, to any person that is not our affiliate, of all of our equity interests in the Subsidiary Guarantor;

• automatically upon the merger of the Subsidiary Guarantor into us or any other Subsidiary Guarantor or the liquidation and dissolution of the Subsidiary Guarantor; or

• following delivery of a written notice by us to the trustee, upon the release of all guarantees by the Subsidiary Guarantor of any debt of ours for borrowed money, except for any series of debt securities under the applicable indenture.

Consolidation, Merger and Sales of Assets

The indentures generally permit a consolidation or merger involving us or the Subsidiary Guarantors. They also permit the Subsidiary Guarantors or us to sell, lease, convey, assign, transfer or otherwise dispose of all or substantially all of our assets. We and the Subsidiary Guarantors have agreed, however, that we will not consolidate with or merge into any entity or sell, lease, convey, assign, transfer or dispose of all or substantially all of our assets to any entity unless:

(1) either

• we or a Subsidiary Guarantor, as the case may be, are the continuing entity; or

• the resulting entity is organized under the laws of the United States, any state thereof or the District of Columbia, and, in the case of us, expressly assumes by supplemental indenture the due and punctual payment of the principal of, premium (if any) and interest on and any additional amounts with respect to the debt securities and the performance of our covenants and obligations under the applicable indenture and the debt securities, or, in the case of such Subsidiary Guarantor, the performance of the guarantee and such Subsidiary Guarantor’s covenants and obligations under the applicable indenture and the debt securities; and

(2) immediately after giving effect to the transaction or series of transactions, no default or event of default under the applicable indenture has occurred and is continuing or would result from the transaction(s).

This covenant will not apply to any merger of another entity into us. Upon any transaction of the type described in and effected in accordance with this section, the resulting entity will succeed to and be substituted for and may exercise all of our rights and powers under the indenture and the debt securities with the same effect as if the resulting entity had been named as us in the applicable indenture. In the case of any asset transfer or disposition other than a lease, when the resulting entity assumes all of our obligations and covenants under the applicable indenture and the debt securities, we will be relieved of all such obligations.

Events of Default

Unless we inform you otherwise in the applicable prospectus supplement, the following are events of default with respect to a series of debt securities:

• our failure to pay interest on any debt security of that series for 30 days when due;

• our failure to pay principal of or any premium on any debt security of that series when due;

• our failure to deposit any sinking fund payment relating to any debt security of that series for 30 days when due;

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• our failure to comply with any covenant or agreement in that series of debt securities or the applicable indenture (other than an agreement or covenant that has been included in the indenture solely for the benefit of other series of debt securities) for 60 days after written notice by the trustee or by the holders of at least 25% in principal amount of the outstanding debt securities issued under that indenture that are affected by that failure;

• specified events involving bankruptcy, insolvency or reorganization of us or a Subsidiary Guarantor with respect to that series of debt securities that is a significant subsidiary (as defined in Regulation S-X promulgated by the SEC, as in effect on the date of the applicable indenture) of us;

• if applicable, specified events involving the guarantees; and

• any other event of default provided for that series of debt securities.

A default under one series of debt securities will not necessarily be a default under any other series. If a default or event of default for any series of debt securities occurs, is continuing and is known to the trustee, the trustee will notify the holders of applicable debt securities within 90 days after it occurs. The trustee may withhold notice to the holders of the debt securities of any default or event of default, except in any payment on the debt securities, if the trustee in good faith determines that withholding notice is in the interests of the holders of those debt securities.

If an event of default for any series of debt securities occurs and is continuing, the trustee or the holders of at least 25% in principal amount of the outstanding debt securities of the series affected by the default (or, in some cases, 25% in principal amount of all debt securities issued under the applicable indenture that are affected, voting as one class) may declare the principal of and all accrued and unpaid interest on those debt securities to be due and payable immediately. If an event of default relating to certain events of bankruptcy, insolvency or reorganization of us or a Subsidiary Guarantor that is a significant subsidiary occurs, the principal of and accrued and unpaid interest on all the debt securities of that series will become immediately due and payable without any action on the part of the trustee or any holder. At any time after a declaration of acceleration has been made, the holders of a majority in principal amount of the outstanding debt securities of the series affected by the default (or, in some cases, of all debt securities issued under the applicable indenture that are affected, voting as one class) may in some cases rescind this accelerated payment requirement and its consequences.

A holder of a debt security of any series issued under an indenture may pursue any remedy under that indenture only if:

• the holder gives the trustee written notice of a continuing event of default with respect to that series of debt securities;

• the holders of at least 25% in principal amount of the outstanding debt securities of that series make a written request to the trustee to pursue the remedy;

• the holders offer to the trustee indemnity satisfactory to the trustee against any loss, liability or expense;

• the trustee does not comply with the request within 60 days after receipt of the request and offer of indemnity; and

• during that 60-day period, the holders of a majority in principal amount of the debt securities of that series do not give the trustee a direction inconsistent with the request.

This provision does not, however, affect the right of a holder of a debt security to sue for enforcement of any overdue payment.

In most cases, the trustee will be under no obligation to exercise any of its rights or powers under the applicable indenture at the request or direction of any of the holders unless those holders have offered to the

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trustee indemnity satisfactory to it. Subject to this provision for indemnification, the holders of a majority in principal amount of the outstanding debt securities of a series (or of all debt securities issued under the applicable indenture that are affected, voting as one class) generally may direct the time, method and place of:

• conducting any proceeding for any remedy available to the trustee; or

• exercising any trust or power conferred on the trustee relating to or arising as a result of an event of default.

If an event of default occurs and is continuing, the trustee will be required to use the degree of care and skill of a prudent person in the conduct of his own affairs.

The indentures require us to furnish to the trustee annually a statement as to our performance of certain of our obligations under the indentures and as to any default in performance.

Modification and Waiver

We and the trustee may supplement or amend each indenture with the consent of the holders of at least a majority in principal amount of the outstanding debt securities of all series issued under that indenture that are affected by the amendment or supplement (voting as one class). Without the consent of the holder of each debt security affected, however, no modification may:

• reduce the amount of debt securities whose holders must consent to an amendment, supplement or waiver;

• reduce the rate of or change the time for payment of interest on the debt security;

• reduce the principal of the debt security or change its stated maturity;

• reduce any premium payable on the redemption of the debt security or change the time at which the debt security may or must be redeemed;

• change any obligation to pay additional amounts on the debt security;

• make payments on the debt security payable in currency other than as originally stated in the debt security;

• impair the holder’s right to institute suit for the enforcement of any payment on or with respect to the debt security;

• make any change in the percentage of principal amount of debt securities necessary to waive compliance with certain provisions of the indenture or to make any change in the provision related to modification;

• with respect to the subordinated indenture, modify the provisions relating to the subordination of any subordinated debt security in a manner adverse to the holder of that security;

• waive a continuing default or event of default regarding any payment on the debt securities;

• except as specifically provided in the indenture, release any Subsidiary Guarantor or modify the related Guarantee in any manner materially adverse to the holders of debt securities under that indenture; or

• if applicable, make any change that materially and adversely affects the right to convert any debt security.

We and the trustee may supplement or amend each indenture or waive any provision of that indenture without the consent of any holders of debt securities issued under that indenture in certain circumstances, including:

• to cure any ambiguity, omission, defect or inconsistency;

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• to provide for the assumption of our obligations under the indenture by a successor upon any merger, consolidation or asset transfer permitted under the indenture;

• to provide for uncertificated debt securities in addition to or in place of certificated debt securities or to provide for bearer debt securities;

• to provide any security for, or to add any guarantees of or obligors on, any series of debt securities;

• to comply with any requirement to effect or maintain the qualification of that indenture under the Trust Indenture Act of 1939, as amended;

• to add covenants that would benefit the holders of any debt securities or to surrender any rights we have under the indenture;

• to add events of default with respect to any series of debt securities;

• to make any change that does not adversely affect any outstanding debt securities of any series issued under that indenture in any material respect; and

• to establish the form or terms of any debt securities and to accept the appointment of a successor trustee, each as permitted under the indenture;

• to supplement any of the provisions of that indenture to the extent necessary to permit or facilitate the defeasance and discharge of any series of debt securities; and

• to provide for the appointment of a successor trustee or to provide for or facilitate the administration of the trusts under that indenture by more than one trustee.

The holders of a majority in principal amount of the outstanding debt securities of any series (or, in some cases, of all debt securities issued under the applicable indenture that are affected, voting as one class) may waive any existing or past default or event of default with respect to those debt securities. Those holders may not, however, waive any default or event of default in any payment on any debt security or compliance with a provision that cannot be amended or supplemented without the consent of each holder affected.

Defeasance and Discharge

Defeasance. When we use the term defeasance, we mean discharge from some or all of our obligations under an indenture. If we deposit with the trustee under an indenture any combination of money or government securities sufficient to make payments on the debt securities of a series issued under that indenture on the dates those payments are due, then, at our option, either of the following will occur:

• we and the Subsidiary Guarantors, if applicable, will be discharged from our obligations with respect to the debt securities of that series (“legal defeasance”); or

• we and the Subsidiary Guarantors, if applicable, will no longer have any obligation to comply with specified restrictive covenants with respect to the debt securities of that series, the covenant described under “—Consolidation, Merger and Sales of Assets” and other specified covenants under the applicable indenture, and the related events of default will no longer apply (“covenant defeasance”).

If a series of debt securities is defeased, the holders of the debt securities of that series will not be entitled to the benefits of the applicable indenture, except for obligations to register the transfer or exchange of debt securities, replace stolen, lost or mutilated debt securities or maintain paying agencies and hold money for payment in trust. In the case of covenant defeasance, our obligation to pay principal, premium and interest on the debt securities, and if applicable, the Subsidiary Guarantors’ guarantees of the payments, will also survive.

Unless we inform you otherwise in the applicable prospectus supplement, we will be required to deliver to the trustee an opinion of counsel that the deposit and related defeasance would not cause the holders of the debt

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securities to recognize income, gain or loss for U.S. federal income tax purposes and that the holders would be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if the deposit and related defeasance had not occurred. If we elect legal defeasance, that opinion of counsel must be based upon a ruling from the United States Internal Revenue Service or a change in law to that effect.

Under current U.S. federal income tax law, legal defeasance would likely be treated as a taxable exchange of debt securities to be defeased for interests in the defeasance trust. As a consequence, a United States holder would recognize gain or loss equal to the difference between the holder’s cost or other tax basis for the debt securities and the value of the holder’s interest in the defeasance trust, and thereafter would be required to include in income a share of the income, gain or loss of the defeasance trust. Under current U.S. federal income tax law, covenant defeasance would not be treated as a taxable exchange of such debt securities.

Satisfaction and Discharge. In addition, an indenture will cease to be of further effect with respect to the debt securities of a series issued under that indenture, subject to exceptions relating to compensation and indemnity of the trustee under that indenture and repayment to us of excess money or government securities, when:

• either

(a) all outstanding debt securities of that series have been delivered to the trustee for cancellation; or

(b) all outstanding debt securities of that series not delivered to the trustee for cancellation either:

• have become due and payable,

• will become due and payable at their stated maturity within one year, or

• are to be called for redemption within one year; and

• we have deposited with the trustee any combination of money or government securities in trust sufficient to pay the entire indebtedness on the debt securities of that series when due; and

• we have paid all other sums payable by us with respect to the debt securities of that series.

Governing Law

New York law will govern the indentures, the debt securities and the guarantees.

The Trustees

The Bank of New York Mellon Trust Company, N.A. (successor to JPMorgan Chase Bank, National Association) acts as the trustee under our senior indenture. Unless we inform you otherwise in a prospectus supplement, The Bank of New York Mellon Trust Company, N.A. will act as the trustee with respect to the senior debt securities described in such prospectus supplement. We will name the trustee under a subordinated indenture in the applicable prospectus supplement.

Each indenture contains limitations on the right of the trustee, if it or any of its affiliates is then our creditor or, if applicable, a creditor of a Subsidiary Guarantor, to obtain payment of claims or to realize on certain property received for any such claim, as security or otherwise. The trustee and its affiliates are permitted to engage in other transactions with us, and, if applicable, the Subsidiary Guarantors. If, however, the trustee acquires any conflicting interest, it must eliminate that conflict or resign within 90 days after ascertaining that it has a conflicting interest and after the occurrence of a default under the applicable indenture, unless the default has been cured, waived or otherwise eliminated within the 90-day period.

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Payments and Paying Agents

Unless we inform you otherwise in the applicable prospectus supplement, we will make payments on the debt securities in U.S. dollars at the office of the trustee and any paying agent. At our option, however, payments may be made by wire transfer for global debt securities or by check mailed to the address of the person entitled to the payment as it appears in the security register. Unless we inform you otherwise in the applicable prospectus supplement, we will make interest payments to the person in whose name the debt security is registered at the close of business on the record date for the interest payment.

Unless we inform you otherwise in the applicable prospectus supplement, the trustee under the applicable indenture will be designated as the paying agent for payments on debt securities issued under that indenture. We may at any time designate additional paying agents or rescind the designation of any paying agent or approve a change in the office through which any paying agent acts.

If the principal of or any premium or interest on debt securities of a series is payable on a day that is not a business day, the payment will be made on the following business day. For these purposes, unless we inform you otherwise in the applicable prospectus supplement, a “business day” is any day that is not a Saturday, a Sunday or a day on which banking institutions in any of New York, New York, Houston, Texas or a place of payment on the debt securities of that series is authorized or obligated by law, regulation or executive order to remain closed.

Subject to the requirements of any applicable abandoned property laws, the trustee and paying agent will pay to us upon written request any money held by them for payments on the debt securities that remains unclaimed for two years after the date upon which that payment has become due. After payment to us, holders entitled to the money must look to us for payment. In that case, all liability of the trustee or paying agent with respect to that money will cease.

Form, Exchange, Registration and Transfer

We will issue the debt securities in registered form, without interest coupons. Debt securities of any series will be exchangeable for other debt securities of the same series, the same total principal amount and the same terms but in different authorized denominations in accordance with the applicable indenture. Holders may present debt securities for registration of transfer at the office of the security registrar or any transfer agent designated by us. The security registrar or transfer agent will effect the transfer or exchange if its requirements and the requirements of the applicable indenture are met. We will not charge a service charge for any registration of transfer or exchange of the debt securities. We may, however, require payment of any transfer tax or similar governmental charge payable for that registration.

We will appoint the trustee as security registrar for the debt securities. If the applicable prospectus supplement refers to any transfer agents we initially designate, we may at any time rescind that designation or approve a change in the location through which any transfer agent acts. We are required to maintain an office or agency for transfers and exchanges in each place of payment. We may at any time designate additional transfer agents for any series of debt securities.

In the case of any redemption of debt securities of a series or any repurchase of debt securities of a series required under the terms of the series, we will not be required to register the transfer or exchange of:

• any debt security of that series during a period beginning 15 business days prior to the mailing of the relevant notice of redemption or repurchase and ending on the close of business on the day of mailing of such notice; or

• any debt security of that series that has been called for redemption in whole or in part, except the unredeemed portion of any debt security being redeemed in part.

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Book-Entry Debt Securities

We may issue the debt securities of a series in the form of one or more global debt securities that would be deposited with a depositary or its nominee identified in the applicable prospectus supplement. We may issue global debt securities in either temporary or permanent form. We will describe in the applicable prospectus supplement the terms of any depositary arrangement and the rights and limitations of owners of beneficial interests in any global debt security.

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DESCRIPTION OF CAPITAL STOCK

General

The following descriptions are summaries of material terms of our common stock, preferred stock, amended and restated certificate of incorporation and amended and restated bylaws. Copies of our amended and restated certificate of incorporation and amended and restated bylaws have been incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you are urged to review these documents. Please read “Where You Can Find More Information.”

As of the date of this prospectus, our authorized capital stock consists of 150 million shares of common stock, par value $0.01 per share, and 50 million shares of preferred stock, par value $0.01 per share.

Common Stock

Each share of common stock entitles the holder to one vote on all matters on which holders are permitted to vote, including the election of directors. There are no cumulative voting rights. Accordingly, holders of a majority of the total votes entitled to vote in an election of directors will be able to elect all of the directors standing for election. Subject to preferences that may be applicable to any outstanding preferred stock, the holders of the common stock will share equally on a per share basis any dividends when, as and if declared by the board of directors out of funds legally available for that purpose. If we are liquidated, dissolved or wound up, the holders of our common stock will be entitled to a ratable share of any distribution to stockholders, after satisfaction of all of our liabilities and of the prior rights of any outstanding class of our preferred stock. Our common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to our common stock. All outstanding shares of our common stock are fully paid and nonassessable.

Preferred Stock

Our board of directors has the authority, without stockholder approval, to issue shares of preferred stock from time to time in one or more series, and to fix the number of shares and terms of each such series. The board may determine the designation and other terms of each series, including the following:

• dividend rates,

• whether dividends will be cumulative or non-cumulative,

• redemption rights,

• liquidation rights,

• sinking fund provisions,

• conversion or exchange rights, and

• voting rights.

The issuance of preferred stock, while providing us with flexibility in connection with possible acquisitions and other transactions, could adversely affect the voting power of holders of our common stock. It could also affect the likelihood that holders of our common stock will receive dividend payments and payments upon liquidation.

The issuance of shares of preferred stock, or the issuance of rights to purchase shares of preferred stock, could be used to discourage an attempt to obtain control of our company. For example, if, in the exercise of its fiduciary obligations, our board of directors were to determine that a takeover proposal was not in the best interest of our stockholders, the board could authorize the issuance of a series of preferred stock containing class voting rights that would enable the holder or holders of this series to prevent a change of control transaction or

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make it more difficult. Alternatively, a change of control transaction deemed by the board to be in the best interest of our stockholders could be facilitated by issuing a series of preferred stock having sufficient voting rights to provide a required percentage vote of the stockholders.

The prospectus supplement relating to any series of preferred stock that we may offer will include specific terms relating to the offering. We will file a form of certificate of designation with the SEC, and you should read the certificate of designation for provisions that may be important to you. The applicable prospectus supplement will summarize the general terms of any such series of preferred stock.

Charter and Bylaw Provisions

Election and Removal of Directors

Our board of directors consists of between one and 11 directors, excluding any directors elected by holders of preferred stock pursuant to provisions applicable in the case of defaults. The exact number of directors will be fixed from time to time by resolution of the board. Our board of directors is divided into three classes serving staggered three-year terms, with only one class being elected each year by our stockholders. At each annual meeting of stockholders, directors will be elected to succeed the class of directors whose terms have expired. This system of electing and removing directors may discourage a third party from making a tender offer or otherwise attempting to obtain control of us, because it generally makes it more difficult for stockholders to replace a majority of the directors. In addition, no director may be removed except for cause, and directors may be removed for cause by an affirmative vote of shares representing a majority of the shares then entitled to vote at an election of directors. Any vacancy occurring on the board of directors and any newly created directorship may only be filled by a majority of the remaining directors in office.

Stockholder Meetings

Our amended and restated certificate of incorporation and our amended and restated bylaws provide that special meetings of our stockholders may be called only by the chairman of our board of directors or a majority of the directors. Our amended and restated certificate of incorporation and our amended and restated bylaws specifically deny any power of any other person to call a special meeting.

Stockholder Action by Written Consent

Our amended and restated certificate of incorporation and our amended and restated bylaws provide that holders of our common stock will not be able to act by written consent without a meeting, unless such consent is unanimous.

Amendment of Certificate of Incorporation

The provisions of our amended and restated certificate of incorporation described above under “—Election and Removal of Directors,” “—Stockholder Meetings” and “—Stockholder Action by Written Consent” may be amended only by the affirmative vote of holders of at least 75% of the voting power of our outstanding shares of voting stock, voting together as a single class. The affirmative vote of holders of at least a majority of the voting power of our outstanding shares of stock is generally required to amend other provisions of our amended and restated certificate of incorporation.

Amendment of Bylaws

Our amended and restated bylaws may generally be altered, amended or repealed, and new bylaws may be adopted, with:

• the affirmative vote of a majority of directors present at any regular or special meeting of the board of directors called for that purpose, provided that any alteration, amendment or repeal of, or adoption of

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any bylaw inconsistent with specified provisions of the bylaws, including those related to special and annual meetings of stockholders, action of stockholders by written consent, classification of the board of directors, nomination of directors, special meetings of directors, removal of directors, committees of the board of directors and indemnification of directors and officers, requires the affirmative vote of at least 75% of all directors in office at a meeting called for that purpose, or

• the affirmative vote of holders of 75% of the voting power of our outstanding shares of voting stock, voting together as a single class.

Other Limitations on Stockholder Actions

Our amended and restated bylaws also impose some procedural requirements on stockholders who wish to:

• make nominations in the election of directors,

• propose that a director be removed,

• propose any repeal or change in our bylaws, or

• propose any other business to be brought before an annual or special meeting of stockholders.

Under these procedural requirements, in order to bring a proposal before a meeting of stockholders, a stockholder must deliver timely notice of a proposal pertaining to a proper subject for presentation at the meeting to our corporate secretary along with the following:

• a description of the business or nomination to be brought before the meeting and the reasons for conducting such business at the meeting,

• the stockholder’s name and address,

• the number of shares beneficially owned by the stockholder and evidence of such ownership, and

• the names and addresses of all persons with whom the stockholder is acting in concert and a description of all arrangements and understandings with those persons, and the number of shares such persons beneficially own.

To be timely, a stockholder must generally deliver notice:

• in connection with an annual meeting of stockholders, not less than 120 nor more than 180 days prior to the date on which the annual meeting of stockholders was held in the immediately preceding year, but in the event that the date of the annual meeting is more than 30 days before or more than 60 days after the anniversary date of the preceding annual meeting of stockholders, a stockholder notice will be timely if received by us not later than the close of business on the later of (1) the 120th day prior to the annual meeting and (2) the 10th day following the day on which we first publicly announce the date of the annual meeting, or

• in connection with the election of a director at a special meeting of stockholders, not less than 40 nor more than 60 days prior to the date of the special meeting, but in the event that less than 55 days’ notice or prior public disclosure of the date of the special meeting of the stockholders is given or made to the stockholders, a stockholder notice will be timely if received by us not later than the close of business on the 10th day following the day on which a notice of the date of the special meeting was mailed to the stockholders or the public disclosure of that date was made.

In order to submit a nomination for our board of directors, a stockholder must also submit any information with respect to the nominee that we would be required to include in a proxy statement, as well as some other information. If a stockholder fails to follow the required procedures, the stockholder’s proposal or nominee will be ineligible and will not be voted on by our stockholders.

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Limitation on Liability of Directors

Our amended and restated certificate of incorporation provides that no director will be personally liable to us or our stockholders for monetary damages for breach of fiduciary duties as a director, except as required by applicable law, as in effect from time to time. Currently, Delaware law requires that liability be imposed for the following:

• any breach of the director’s duty of loyalty to our company or our stockholders,

• any act or omission not in good faith or which involved intentional misconduct or a knowing violation of law,

• unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the Delaware General Corporation Law, and

• any transaction from which the director derived an improper personal benefit.

Our amended and restated bylaws provide that, to the fullest extent permitted by law, we will indemnify any officer or director of our company against all damages, claims and liabilities arising out of the fact that the person is or was our director or officer, or served any other enterprise at our request as a director, officer, employee, agent or fiduciary. We will reimburse the expenses, including attorneys’ fees, incurred by a person indemnified by this provision when we receive an undertaking to repay such amounts if it is ultimately determined that the person is not entitled to be indemnified by us. Amending this provision will not reduce our indemnification obligations relating to actions taken before an amendment.

Anti-Takeover Effects of Some Provisions

Some provisions of our amended and restated certificate of incorporation and amended and restated bylaws could make the following more difficult:

• acquisition of control of us by means of a proxy contest or otherwise, or

• removal of our incumbent officers and directors.

These provisions, as well as our ability to issue preferred stock, are designed to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to encourage persons seeking to acquire control of us to first negotiate with our board of directors. We believe that the benefits of increased protection give us the potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure us, and that the benefits of this increased protection outweigh the disadvantages of discouraging those proposals, because negotiation of those proposals could result in an improvement of their terms.

Transactions and Corporate Opportunities

Our amended and restated certificate of incorporation includes provisions that regulate and define the conduct of specified aspects of the business and affairs of our company. These provisions serve to determine and delineate the respective rights and duties of our company, our principal stockholder, TTWF LP, and its direct and indirect equity owners and directors, officers, employees, partners or equity owners of such entities (the “principal stockholder affiliates”), and some of our directors and officers in anticipation of the following:

• the principal stockholder affiliates serving as our directors and/or officers,

• the principal stockholder affiliates engaging in lines of business that are the same as, or similar to, our lines of business,

• the principal stockholder affiliates having an interest in the same areas of corporate opportunity as we have, and

• we and the principal stockholder affiliates engaging in material business transactions.

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We may enter into agreements with the principal stockholder affiliates to engage in any transaction. We may also enter into agreements with the principal stockholder affiliates to compete or not to compete with each other, including agreements to allocate, or to cause our directors, officers and employees and the principal stockholder affiliates to allocate, opportunities between the principal stockholder affiliates and us. Our amended and restated certificate of incorporation provides that no such agreement will be considered contrary to any fiduciary duty of the principal stockholder affiliates, as our direct and indirect controlling stockholders, or our directors, officers or employees. Neither the principal stockholder affiliates nor any of our directors, officers or employees who are also principal stockholder affiliates are under any fiduciary duty to us to refrain from acting on our behalf or on behalf of the principal stockholder affiliates in respect of any such agreement or transaction. These provisions are generally subject to the corporate opportunity obligations described below with which the principal stockholder affiliates and our officers and directors who are also principal stockholder affiliates must comply.

Under our amended and restated certificate of incorporation, the principal stockholder affiliates have no duty to refrain from engaging in activities or lines of business similar to ours or from doing business with any of our clients, customers or vendors and, except as discussed in the above paragraph, the principal stockholder affiliates will not be liable to us or our stockholders for breach of any fiduciary duty as a stockholder by reason of any of these activities. In addition, if the principal stockholder affiliates or one of our directors or officers who is also a principal stockholder affiliate acquires knowledge of a potential transaction or matter which may be a corporate opportunity for both our company and the principal stockholder affiliates, then neither the principal stockholder affiliates nor any such person will have a duty to communicate or offer this corporate opportunity to us and will not be liable to us or our stockholders for breach of any fiduciary duty by reason of the fact that the principal stockholder affiliates pursue or acquire the corporate opportunity for themselves, direct the corporate opportunity to another person or do not communicate information regarding the corporate opportunity to us, so long as the principal stockholder affiliates act in a manner consistent with the following policy: A corporate opportunity offered to the principal stockholder affiliates or to any person who is one of our officers or directors and who is also a principal stockholder affiliate will belong to the principal stockholder affiliates, unless the opportunity was expressly offered in writing to the principal stockholder affiliates solely in their capacity as direct and indirect stockholders of our company or to that person solely in his or her capacity as one of our directors or officers.

Anyone becoming one of our stockholders will be deemed to have notice of and consented to these provisions of our amended and restated certificate of incorporation. Our amended and restated certificate of incorporation provides that in no event shall any amendment of these provisions subject any principal stockholder affiliate to liability for any act or omission occurring prior to such amendment for which such person would be deemed not to be liable under these provisions prior to such amendment.

Delaware Business Combination Statute

We have expressly elected not to be subject to Section 203 of the General Corporation Law of the State of Delaware, which is described below. However, our stockholders can amend our amended and restated certificate of incorporation and amended and restated bylaws to elect to be subject to Section 203. Section 203 provides that, subject to specified exceptions, an interested stockholder of a Delaware corporation is not permitted to engage in any business combination, including mergers or consolidations or acquisitions of additional shares of the corporation, with the corporation for a three-year period following the time that stockholder became an interested stockholder, unless one of the following conditions is met:

• prior to the time the stockholder became an interested stockholder, the board of directors approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder,

• upon consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, other than statutorily excluded shares, or

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• on or subsequent to the time the stockholder became an interested stockholder, the business combination is approved by the board of directors and authorized at an annual or special meeting of stockholders by the affirmative vote of at least 66 2 / 3 % of the outstanding voting stock which is not owned by the interested stockholder.

Except as otherwise set forth in Section 203, “interested stockholder” means:

• any person that is the owner of 15% or more of the outstanding voting stock of the corporation, or is an affiliate or associate of the corporation and was the owner of 15% or more of the outstanding voting stock of the corporation at any time within three years immediately prior to the date of determination, and

• the affiliates and associates of any such person.

If we ever become subject to Section 203, it may be more difficult for a person who is an interested stockholder to effect various business combinations with us for the applicable three-year period. Section 203, if it becomes applicable, also may have the effect of preventing changes in our management. It is possible that Section 203, if it becomes applicable, could make it more difficult to accomplish transactions which our stockholders may otherwise deem to be in their best interests. The provisions of Section 203, if it becomes applicable, may cause persons interested in acquiring us to negotiate in advance with our board of directors. The restrictions on business combinations set forth in Section 203 are not applicable to the principal stockholder so long as the principal stockholder holds 15% or more of our outstanding shares of common stock. Because we are not currently subject to Section 203, the principal stockholder, as a controlling stockholder, may find it easier to sell its controlling interest to a third party because Section 203 would not apply to the third party.

Listing of Common Stock

Our common stock is listed on the New York Stock Exchange under the symbol “WLK.”

Transfer Agent and Registrar

The transfer agent and registrar for our common stock is American Stock Transfer & Trust Company.

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DESCRIPTION OF WARRANTS

We may issue warrants to purchase debt securities, common stock, preferred stock or other securities or any combination of the foregoing. We may issue warrants independently or together with other securities. Warrants sold with other securities may be attached to or separate from the other securities. We will issue warrants under one or more warrant agreements between us and a warrant agent that we will name in the applicable prospectus supplement.

The prospectus supplement relating to any warrants that we may offer will include specific terms relating to the offering. We will file the form of any warrant agreement with the SEC, and you should read the warrant agreement for provisions that may be important to you. The applicable prospectus supplement will include some or all of the following terms:

• the title of the warrants;

• the aggregate number of warrants offered;

• the designation, number and terms of the debt securities, common stock, preferred stock or other securities purchasable upon exercise of the warrants, and the procedures by which those numbers may be adjusted;

• the exercise price of the warrants;

• the dates or periods during which the warrants are exercisable;

• the designation and terms of any securities with which the warrants are issued;

• if the warrants are issued as a unit with another security, the date, if any, on and after which the warrants and the other security will be separately transferable;

• if the exercise price is not payable in U.S. dollars, the foreign currency, currency unit or composite currency in which the exercise price is denominated;

• any minimum or maximum amount of warrants that may be exercised at any one time; and

• any terms, procedures and limitations relating to the transferability, exchange or exercise of the warrants.

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SELLING STOCKHOLDER

In addition to covering the issuance and sale of securities by us, this prospectus covers the possible sale from time to time of up to 4,500,000 shares of our common stock by the selling stockholder listed below. As used in this prospectus, “selling stockholder” includes the successors-in-interest, donees, transferees or others who may later hold the selling stockholder’s interests and who will be named in the applicable supplement to this prospectus.

The following table sets forth information as of March 28, 2013 regarding the beneficial ownership of the common stock held by the selling stockholder. Since the selling stockholder may sell none, all, or a portion of the 4,500,000 shares of our common stock included in the prospectus, no meaningful estimate can be given as to the amount or percentage of shares that will be held by the selling stockholder after completion of any sale by the selling stockholder.

Name and Address	Number of Shares	Percent of Stock (1)
TTWF LP (2) (3)	46,005,277	68.4%

(1) Calculated as of September 2, 2013 based on 67,276,727 shares of common stock outstanding.

(2) The address of the selling stockholder is 2801 Post Oak Boulevard, Houston, Texas 77056. The selling stockholder may be deemed an “underwriter” within the meaning of the Securities Act of 1933, as amended (the “Securities Act”), with respect to sales of the shares listed above.

(3) Two trusts for the benefit of members of the Chao family, including James Chao, our Chairman of the Board of Directors, Dorothy C. Jenkins, a director, and Albert Chao, our President and Chief Executive Officer and a director, are the managers of TTWFGP LLC, a Delaware limited liability company, which is the general partner of TTWF LP. The limited partners of TTWF LP are five trusts principally for the benefit of members of the Chao family, including James Chao, Dorothy C. Jenkins and Albert Chao and two corporations owned, indirectly or directly, by certain of these trusts and by other entities owned by members of the Chao family, including James Chao, Dorothy C. Jenkins and Albert Chao. TTWF LP and TTWFGP LLC each have shared voting power and shared dispositive power over 46,005,277 shares of our common stock. As of March 28, 2013, James Chao had sole voting power and sole dispositive power over 85,406 shares of our common stock, sole voting and no dispositive power over 18,256 shares of our common stock, and shared voting power and shared dispositive power over 46,005,277 shares of our common stock. Dorothy C. Jenkins had sole voting power and sole dispositive power over 25,432 shares of our common stock, sole voting power and no dispositive power over 3,419 shares of our common stock, and shared voting power and shared dispositive power over 46,005,277 shares of our common stock. Albert Chao had sole voting power and sole dispositive power over 371,813 shares of our common stock, sole voting and no dispositive power over 23,546 shares of our common stock and shared voting power and shared dispositive power over 46,005,277 shares of our common stock. James Chao, Dorothy C. Jenkins and Albert Chao disclaim beneficial ownership of the 46,005,277 shares of our common stock held by TTWF LP except to the extent of their respective pecuniary interest therein.

Registration Rights Agreement

We are party to a registration rights agreement with the selling stockholder under which we have agreed, at the request of the selling stockholder, to use our best efforts to register shares of our common stock that are held by the selling stockholder for public sale under the Securities Act. As long as the selling stockholder owns a majority of the voting power of our outstanding common stock, there is no limit to the number of registrations that it may request. Once the selling stockholder owns less than a majority of the voting power of our outstanding common stock, it can request a total of five additional registrations. We have also agreed in the registration rights agreement to provide the selling stockholder and its permitted transferees with “piggy-back” rights to include its shares in registrations of our common stock under the Securities Act. There is no limit on the number of these “piggy-back” registrations in which the selling stockholder may request its shares be included. These rights will

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terminate once the selling stockholder is able to dispose of all of its shares of our common stock within a three-month period pursuant to the exemption from registration provided under Rule 144 of the Securities Act. We have agreed to cooperate in these registrations and related offerings. We and the selling stockholder have agreed to restrictions on the ability of each party to sell securities following registrations by either party. The shares of our common stock that may be sold by the selling stockholder hereunder are included in this prospectus pursuant to the registration rights agreement.

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PLAN OF DISTRIBUTION

We and the selling stockholder may sell the securities in and outside the United States (a) through underwriters or dealers, (b) directly to purchasers or (c) through agents. The applicable prospectus supplement will include the following information:

• the terms of the offering;

• the names of any underwriters or agents;

• the purchase price of the securities from us or the selling stockholder and, if the purchase price is not payable in U.S. dollars, the currency, currency unit or composite currency in which the purchase price is payable;

• the net proceeds to us or the selling stockholder from the sale of securities;

• any delayed delivery arrangements;

• any underwriting discounts, commissions and other items constituting underwriters’ compensation;

• the initial public offering price;

• any discounts or concessions allowed or reallowed or paid to dealers; and

• any commissions paid to agents.

Sale Through Underwriters or Dealers

If we or the selling stockholder use underwriters in the sale of securities, the underwriters will acquire the securities for their own account. The underwriters may resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Underwriters may offer securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. Unless we inform you otherwise in the applicable prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to conditions, and the underwriters will be obligated to purchase all the offered securities if they purchase any of them. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers.

During and after an offering through underwriters, the underwriters may purchase and sell the securities in the open market. These transactions may include overallotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. The underwriters also may impose a penalty bid, which means that selling concessions allowed to syndicate members or other broker-dealers for the offered securities sold for their account may be reclaimed by the syndicate if the offered securities are repurchased by the syndicate in stabilizing or covering transactions. These activities may stabilize, maintain or otherwise affect the market price of the offered securities, which may be higher than the price that might otherwise prevail in the open market. If commenced, the underwriters may discontinue these activities at any time.

If we or the selling stockholder use dealers in the sale of securities, the securities will be sold directly to them as principals. They may then resell those securities to the public at varying prices determined by the dealers at the time of resale. The dealers participating in any sale of the securities may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will include in the applicable prospectus supplement the names of the dealers and the terms of the transaction.

Direct Sales and Sales Through Agents

We or the selling stockholder may sell the securities directly. In that event, no underwriters or agents would be involved. We or the selling stockholder may also sell the securities through agents designated from time to

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time. In the applicable prospectus supplement, we will name any agent involved in the offer or sale of the offered securities, and we will describe any commissions payable by us or the selling stockholder to the agent. Unless we inform you otherwise in the applicable prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

We or the selling stockholder may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We or the selling stockholder will describe the terms of any such sales in the applicable prospectus supplement.

Private Sales

The shares of our common stock covered by this prospectus that may be sold by the selling stockholder qualify for sale pursuant to Rule 144 under the Securities Act and may be sold by the selling stockholder under Rule 144 rather than pursuant to this prospectus.

Delayed Delivery Contracts

If we so indicate in the applicable prospectus supplement, we or the selling stockholder may authorize agents, underwriters or dealers to solicit offers from certain types of institutions to purchase securities from us at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the applicable prospectus supplement. The applicable prospectus supplement will describe the commission payable for solicitation of those contracts.

Remarketing

We may offer and sell any of the securities in connection with a remarketing upon their purchase, in accordance with a redemption or repayment by their terms or otherwise, by one or more remarketing firms acting as principals for their own accounts or as our agents. We will identify any remarketing firm, the terms of any remarketing agreement and the compensation to be paid to the remarketing firm in the applicable prospectus supplement. Remarketing firms may be deemed underwriters under the Securities Act.

Derivative Transactions

We or the selling stockholder may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third parties may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock.

We, the selling stockholder or one of our respective affiliates may loan or pledge securities to a financial institution or other third party that in turn may sell the securities using this prospectus. Such financial institution or third party may transfer its short position to investors in our securities or in connection with a simultaneous offering of other securities offered by this prospectus or otherwise.

The third parties in any of the sale transactions described above will be underwriters and will be identified in the applicable prospectus supplement or in a post-effective amendment to the registration statement of which this prospectus forms a part.

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General Information

We or the selling stockholder may have agreements with the agents, dealers and underwriters to indemnify them against certain civil liabilities, including liabilities under the Securities Act, or to contribute with respect to payments that the agents, dealers or underwriters may be required to make. Agents, dealers and underwriters may be customers of, engage in transactions with or perform services for us in the ordinary course of their businesses.

Pursuant to the registration rights agreement described under “Selling Stockholder,” we have agreed to pay all of the costs, fees and expenses incurred by us incident to our registration of the resale of the selling stockholder’s common stock, as well as legal fees and expenses of counsel to the selling stockholder. We will not pay any commissions, fees and discounts of underwriters, brokers, dealers and agents with respect to shares of our common stock sold by the selling stockholder.

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LEGAL OPINIONS

Certain legal matters in connection with this offering will be passed upon for us by Baker Botts L.L.P., Houston, Texas. Any underwriters will be advised about other issues relating to any offering by their own legal counsel, which firm will be named in the applicable prospectus supplement.

EXPERTS

The financial statements and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Report on Internal Control over Financial Reporting) incorporated in this prospectus by reference to our Annual Report on Form 10-K for the year ended December 31, 2012 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

WHERE YOU CAN FIND MORE INFORMATION

We file reports, proxy statements and other information with the SEC. You can read and copy any materials we file with the SEC at the SEC’s public reference room at 100 F Street, N.E., Room 1850, Washington, D.C. 20549. You can obtain information about the operation of the SEC’s public reference room by calling the SEC at 1-800-SEC-0330. The SEC also maintains a Web site that contains information we file electronically with the SEC, which you can access over the Internet at http://www.sec.gov. You can obtain information about us at the offices of the New York Stock Exchange, 20 Broad Street, New York, New York 10005.

Our Web site is located at http: //www.westlake.com. Our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings with the SEC are available, free of charge, through our Web site, as soon as reasonably practicable after those reports or filings are electronically filed with or furnished to the SEC. Information on our Web site or any other website is not incorporated by reference in this prospectus and does not constitute a part of this prospectus.

This prospectus is part of a registration statement we have filed with the SEC relating to the securities we and the selling stockholder may sell. As permitted by SEC rules, this prospectus does not contain all of the information we have included in the registration statement and the accompanying exhibits and schedules we file with the SEC. You may refer to the registration statement, the exhibits and the schedules for more information about us, the selling stockholder and our securities. The registration statement, exhibits and schedules are available at the SEC’s public reference room or through its Web site.

We are incorporating by reference information we file with the SEC, which means that we are disclosing important information to you by referring you to those documents. The information we incorporate by reference is an important part of this prospectus, and later information that we file with the SEC automatically will update and supersede this information. We incorporate by reference the documents listed below and any future filings we make with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), until we sell all the securities:

• our annual report on Form 10-K for the fiscal year ended December 31, 2012;

• our quarterly reports on Form 10-Q for the quarters ended March 31, 2013 and June 30, 2013;

• our current reports on Form 8-K filed with the SEC on March 7, 2013, March 29, 2013, April 8, 2013 and May 22, 2013; and

• the description of our common stock contained in our Registration Statement on Form 8-A filed with the SEC on July 30, 2004, as we may update that description from time to time.

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You may request a copy of these filings (other than an exhibit to those filings unless we have specifically incorporated that exhibit by reference into the filing), at no cost, by writing or telephoning us at the following address:

Westlake Chemical Corporation

2801 Post Oak Boulevard, Suite 600

Houston, Texas 77056

Attention: Investor Relations

Telephone: (713) 960-9111

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution.

The following table sets forth the estimated expenses payable by Westlake Chemical Corporation, a Delaware corporation (“Westlake”), in connection with the offering described in this Registration Statement.

Registration fee	$		*
Printing expenses		100,000
Accounting fees and expenses		100,000
Legal fees and expenses		100,000
Trustee fees and expenses		20,000
Rating agency fees		350,000
Miscellaneous		80,000
Total	$	750,000

* Applicable SEC registration fees have been deferred in accordance with Rules 456(b) and 457(r) of the Securities Act and are not estimable at this time. Up to $46,084 of the registration fee previously paid with respect to $1,049,900,000 aggregate initial offering price of securities that were previously registered pursuant to Registration Statement File No. 333-124581 (initially filed by the Registrant on May 3, 2005) and not sold thereunder, which amount was carried forward pursuant to Rule 457(p) to the Registration Statement File No. 333-150206 (initially filed by the Registrant on April 11, 2008) and subsequently carried forward pursuant to Rule 457(p) to the Registration Statement File No. 333-177119 (initially filed by the Registrant on September 30, 2011), may be used to offset future registration fees due under this Registration Statement pursuant to Rule 457(p) of the Securities Act.

Item 15. Indemnification of Directors and Officers.

Delaware Corporations. Delaware law permits a corporation to adopt a provision in its certificate of incorporation eliminating or limiting the personal liability of a director, but not an officer in his or her capacity as such, to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except that such provision shall not eliminate or limit the liability of a director for (1) any breach of the director’s duty of loyalty to the corporation or its stockholders, (2) acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (3) liability under section 174 of the Delaware General Corporation Law (the “DGCL”) for unlawful payment of dividends or stock purchases or redemptions or (4) any transaction from which the director derived an improper personal benefit.

The amended and restated certificate of incorporation of Westlake provides that, to the fullest extent of Delaware law, no Westlake director shall be liable to Westlake or its stockholders for monetary damages for breach of fiduciary duty as a director.

Under Delaware law, a corporation may indemnify any person who was or is a party or is threatened to be made a party to any type of proceeding, other than an action by or in the right of the corporation, because he or she is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation a director, officer, employee or agent of another corporation or other entity, against expenses, including attorneys’ fees, judgments, fines and amounts paid in settlement actually and reasonably incurred in connection with such proceeding if: (1) he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation and (2) with respect to any criminal proceeding, he or she had no reasonable cause to believe that his or her conduct was unlawful. A corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit brought by or in the right of the corporation because he or she is or was a director,

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officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or other entity, against expenses, including attorneys’ fees, actually and reasonably incurred in connection with such action or suit if he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, except that no indemnification will be made if the person is found liable to the corporation unless, in such a case, the court determines the person is nonetheless entitled to indemnification for such expenses. A corporation must also indemnify a present or former director or officer who has been successful on the merits or otherwise in defense of any proceeding, or in defense of any claim, issue or matter therein, against expenses, including attorneys’ fees, actually and reasonably incurred by him or her. Expenses, including attorneys’ fees, incurred by a director or officer, or any employees or agents as deemed appropriate by the board of directors, in defending civil or criminal proceedings may be paid by the corporation in advance of the final disposition of such proceedings upon receipt of an undertaking by or on behalf of such director, officer, employee or agent to repay such amount if it shall ultimately be determined that he or she is not entitled to be indemnified by the corporation. The Delaware law regarding indemnification and the advancement of expenses is not exclusive of any other rights a person may be entitled to under any bylaw, agreement, vote of stockholders or disinterested directors or otherwise.

Under the DGCL, the termination of any proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that a person did not act in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal proceeding, had reasonable cause to believe that his or her conduct was unlawful.

Delaware law also provides that a corporation may purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or other entity, against any liability asserted against and incurred by such person, whether or not the corporation would have the power to indemnify such person against such liability.

Westlake’s amended and restated certificate of incorporation and amended and restated bylaws authorize indemnification of any person entitled to indemnity under law to the full extent permitted by law. The bylaws of Geismar Holdings, Inc., GVGP, Inc., Westlake Chemical Investments, Inc., Westlake Development Corporation, Westlake Ethylene Pipeline Corporation, Westlake Longview Corporation, Westlake NG I Corporation, Westlake NG IV Corporation, Westlake NG V Corporation and Westlake Vinyls, Inc. require indemnification of officers, directors, employees and agents to the extent permitted by the DGCL. The bylaws of Westech Building Products, Inc. require indemnification of directors and officers to the fullest extent permitted by applicable law and such indemnification must be approved by a two-thirds vote of the board upon a determination by the board that indemnification is proper. The bylaws of North American Pipe Corporation, Westlake Management Services, Inc., Westlake Olefins Corporation, Westlake PVC Corporation, Westlake Resources Corporation and Westlake Vinyl Corporation contain no provisions regarding indemnification of officers or directors. The certificate of incorporation for Westlake Supply and Trading Company requires indemnification of officers and directors and allows indemnification of employees and agents, in each case to the extent permitted by the DGCL.

Delaware Limited Partnerships. Subject to such standards and restrictions as are set forth in its limited partnership agreement, the Delaware Revised Uniform Limited Partnership Act empowers a Delaware limited partnership to indemnify and hold harmless any partner or other person from and against any and all claims and demands. The limited partnership agreement for each Delaware limited partnership that is a registrant provides that (1) the general partner’s obligation to perform are performable only to the extent that the partnership has funds available and (2) neither the general partner nor its affiliates shall ever be personally liable to involuntarily furnish its or their own funds for any such purposes, to respond in damages or to render specific performance. The limited partners agree to look solely to the general partner’s partnership interest for recovery of any judgment against the general partner. So long as the general partner acts in good faith, it has no liability or obligation to the partnership or

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to any partner for any decision, act or omission, whether or not such decision, act or omission was (1) authorized or reasonably prudent or (2) the result of the exercise of good or bad business judgment.

Delaware Limited Liability Companies. The Delaware Limited Liability Company Act provides that a limited liability company has the power to indemnify and hold harmless any member or manager or other person from and against any and all claims and demands whatsoever. The limited liability company agreement for each Delaware limited liability company that is a registrant provides that, with certain exceptions, no manager or officer will have any personal liability whatsoever to the limited liability company or any member on account of such manager’s or officer’s status as a manager or officer or by reason of such manager’s or officer’s acts or omissions in connection with the conduct of the business of the company. The debts, obligations and liabilities of each limited liability company, whether arising in contract, tort or otherwise, will be solely the debts, obligations and liabilities of the company, and no manager, member or officer will be obligated personally for any such debt, obligation or liability of the company solely by reason of being a manager, member or officer.

Item 16. Exhibits. †

Exhibit No.	Exhibit Description
1.1†	Form of Underwriting Agreement, relating to equity securities.
1.2†	Form of Underwriting Agreement, relating to debt securities.
3.1(a)**	Certificate of Incorporation of Geismar Holdings, Inc. as filed with the Delaware Secretary of State on December 26, 2002.
3.1(b)******	By-Laws of Geismar Holdings, Inc.
3.2(a)**	Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on January 2, 2003.
3.2(b)**	Certificate of Amendment to the Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on January 8, 2003.
3.2(c)***	Certificate of Amendment to the Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on August 1, 2005.
3.2(d)**	Agreement of Limited Partnership of Westlake Vinyls Company LP, dated as of December 27, 2002.
3.3(a)**	Certificate of Incorporation of GVGP, Inc. as filed with the Delaware Secretary of State on December 26, 2002.
3.3(b)******	By-Laws of GVGP, Inc.
3.4(a)**	Certificate of Incorporation of North American Pipe Corporation as filed with the Delaware Secretary of State on May 29, 1992.
3.4(b)**	Certificate of Amendment to the Certificate of Incorporation of North American Pipe Corporation as filed with the Delaware Secretary of State on July 7, 1992.
3.4(c)******	Bylaws of North American Pipe Corporation.
3.5(a)**	Certificate of Incorporation of Westech Building Products, Inc. as filed with the Delaware Secretary of State on May 25, 1994.
3.5(b)**	Certificate of Amendment to the Certificate of Incorporation of Westech Building Products, Inc. as filed with the Delaware Secretary of State on May 6, 1996.
3.5(c)******	By-Laws of Westech Building Products, Inc.

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Exhibit No.	Exhibit Description
3.6(a)**	Certificate of Incorporation of Westlake Chemical Investments, Inc. as filed with the Delaware Secretary of State on December 13, 2000.
3.6(b)**	By-Laws of Westlake Chemical Investments, Inc.
3.7(a)**	Certificate of Incorporation of Westlake Development Corporation as filed with the Delaware Secretary of State on December 13, 2000.
3.7(b)******	By-Laws of Westlake Development Corporation.
3.8(a)******	Certificate of Conversion of Westlake Geismar Power Company LLC as filed with the Delaware Secretary of State on January 12, 2011.
3.8(b)******	Certificate of Formation of Westlake Geismar Power Company LLC as filed with the Delaware Secretary of State on January 12, 2011.
3.8(c)******	Limited Liability Company Agreement of Westlake Geismar Power Company LLC, dated January 12, 2011.
3.9(a)****	Certificate of Incorporation of Westlake Supply and Trading Company as filed with the Delaware Secretary of State on July 20, 1992.
3.9(b)*****	Certificate of Amendment to the Certificate of Incorporation of Westlake Supply and Trading Company as filed with the Delaware Secretary of State on May 8, 2007.
3.9(c)****	Bylaws of Westlake Supply and Trading Company.
3.10(a)**	Certificate of Incorporation of Westlake Management Services, Inc. as filed with the Delaware Secretary of State on November 5, 1990.
3.10(b)******	Bylaws of Westlake Management Services, Inc.
3.11(a)**	Certificate of Incorporation of Westlake Olefins Corporation as filed with the Delaware Secretary of State on May 15, 1989.
3.11(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Olefins Corporation as filed with the Delaware Secretary of State on July 20, 1992.
3.11(c)**	By-Laws of Westlake Olefins Corporation.
3.12(a)*****	Certificate of Conversion of Westlake Petrochemicals LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.12(b)*****	Certificate of Formation of Westlake Petrochemicals LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.12(c)*****	Limited Liability Company Agreement of Westlake Petrochemicals LLC, dated December 31, 2007.
3.13(a)******	Certificate of Formation of Westlake Pipeline Investments LLC as filed with the Delaware Secretary of State on August 31, 2010.
3.13(b)******	Limited Liability Company Agreement of Westlake Pipeline Investments LLC, dated August 31, 2010.
3.14(a)*****	Certificate of Conversion of Westlake Polymers LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.14(b)*****	Certificate of Formation of Westlake Polymers LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.14(c)*****	Limited Liability Company Agreement of Westlake Polymers LLC, dated December 31, 2007.

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Exhibit No.	Exhibit Description
3.15(a)**	Certificate of Incorporation of Westlake PVC Corporation as filed with the Delaware Secretary of State on August 19, 1991.
3.15(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake PVC Corporation as filed with the Delaware Secretary of State on August 20, 1991.
3.15(c)******	Bylaws of Westlake PVC Corporation.
3.16(a)**	Certificate of Incorporation of Westlake Resources Corporation as filed with the Delaware Secretary of State on October 23, 1990.
3.16(b)******	Bylaws of Westlake Resources Corporation.
3.17(a)*****	Certificate of Conversion of Westlake Styrene LLC as filed with the Delaware Secretary of State on December 31, 2007
3.17(b)*****	Certificate of Formation of Westlake Styrene LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.17(c)*****	Limited Liability Company Agreement of Westlake Styrene LLC, dated December 31, 2007.
3.18(a)**	Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on June 8, 1990.
3.18(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on October 18, 1993.
3.18(c)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on November 4, 1993.
3.18(d)**	Bylaws of Westlake Vinyl Corporation.
3.19(a)**	Certificate of Incorporation of Westlake Vinyls, Inc. as filed with the Delaware Secretary of State on July 10, 1997.
3.19(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyls, Inc. as filed with the Delaware Secretary of State on September 28, 2001.
3.19(c)******	By-Laws of Westlake Vinyls, Inc.
3.20(a)*****	Certificate of Formation of WPT LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.20(b)*****	Limited Liability Company Agreement of WPT LLC, dated December 31, 2007.
3.21(a)***	Certificate of Incorporation of Westlake NG I Corporation as filed with the Delaware Secretary of State on November 18, 2005.
3.21(b)***	Bylaws of Westlake NG I Corporation.
3.22(a)***	Certificate of Incorporation of Westlake Longview Corporation as filed with the Delaware Secretary of State on November 18, 2005.
3.22(b)***	Certificate of Amendment to Certificate of Incorporation of Westlake Longview Corporation as filed with the Delaware Secretary of State on November 3, 2006.
3.22(c)*****	Bylaws of Westlake Longview Corporation.
3.23(a)*****	Certificate of Incorporation of Westlake Ethylene Pipeline Corporation as filed with the Delaware Secretary of State on October 26, 2006.
3.23(b)*****	Bylaws of Westlake Ethylene Pipeline Corporation.

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Exhibit No.	Exhibit Description
3.24(a)*****	Certificate of Incorporation of Westlake NG IV Corporation as filed with the Delaware Secretary of State on March 24, 2008.
3.24(b)******	Bylaws of Westlake NG IV Corporation.
3.25(a)*****	Certificate of Incorporation of Westlake NG V Corporation as filed with the Delaware Secretary of State on March 24, 2008.
3.25(b)******	Bylaws of Westlake NG V Corporation.
3.26(a)	Certificate of Formation of North American Specialty Products LLC as filed with the Delaware Secretary of State on April 1, 2013.
3.26(b)	Limited Liability Company Agreement of North American Specialty Products LLC, dated April 1, 2013.
4.1*	Amended and Restated Certificate of Incorporation of Westlake as filed with the Delaware Secretary of State on August 6, 2004 (incorporated by reference to Westlake’s Registration Statement on Form S-1/A, filed on August 9, 2004).
4.2*	Amended and Restated Bylaws of Westlake (incorporated by reference to Westlake’s Registration Statement on Form S-1/A, filed on August 9, 2004).
4.3*	Indenture dated as of January 1, 2006 by and among Westlake, the potential subsidiary guarantors listed therein and JPMorgan Chase Bank, National Association, as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on January 13, 2006, File No. 1-32260).
4.4*	Second Supplemental Indenture, dated as of November 1, 2007, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 18, 2007, File No. 1-32260).
4.5*	Form of Westlake’s 6 3⁄4% Senior Notes due 2032 (included in Exhibit 4.4).
4.6*	Third Supplemental Indenture, dated as of July 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on July 8, 2010, File No. 1-32260).
4.7*	Form of Westlake’s 6 1⁄2% Senior Notes due 2029 (included in exhibit 4.6).
4.8*	Fourth Supplemental Indenture, dated as of December 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 8, 2010, File No. 1-32260).
4.9*	Form of Westlake’s 6 1⁄2% Senior Notes due 2035 (included in Exhibit 4.8).
4.10*	Fifth Supplemental Indenture, dated as of December 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 8, 2010, File No. 1-32260).
4.11*	Form of Westlake’s 6 1⁄2% Senior Notes due 2035 (included in Exhibit 4.10).
4.12*	Sixth Supplemental Indenture, dated as of July 17, 2012, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.2 to Westlake’s Current Report on Form 8-K, filed on July 16, 2012, File No. 1-32260).
4.13*	Form of Westlake’s 3.60% senior notes due 2022 (included in Exhibit 4.12).

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Exhibit No.	Exhibit Description
4.14*	Seventh Supplemental Indenture, dated as of February 12, 2013, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.16 to Westlake’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012, filed on February 22, 2013, File No. 1-32260).
4.15*	Form of Indenture between Westlake and the trustee thereunder (the “Subordinated Trustee”), relating to subordinated debt securities (incorporated by reference to Exhibit 1.1 to Westlake’s Registration Statement on Form S-3 filed on May 3, 2005, Registration No. 333-124581).
4.16*	Form of Westlake Common Stock Certificate (incorporated by reference to Exhibit 4.1 to Amendment No. 4 to Westlake’s Registration Statement on Form S-1 filed on August 9, 2004, Registration No. 333-115790).
5.1	Opinion of Baker Botts L.L.P. as to the legality of the securities.
10.1*	Form of Registration Rights Agreement between Westlake and TTWF LP (incorporated by reference to Exhibit 10.13 to Westlake’s Registration Statement on Form S-1/A filed on July 2, 2004 under Registration No. 333-115790).
12.1	Statement of computation of ratio of earnings to fixed charges for the years ended December 31, 2012, 2011, 2010, 2009 and 2008 and for the six months ended June 30, 2013.
23.1	Consent of PricewaterhouseCoopers LLP.
23.2	Consent of Baker Botts L.L.P. (included in Exhibit 5.1).
24.1	Powers of Attorney of certain officers and directors of Westlake.
24.2	Powers of Attorney of certain officers and directors of certain Subsidiary Guarantors.
25.1	Statement of Eligibility of Trustee under Trust Indenture Act with respect to the Senior Indenture.

† Westlake will file as an exhibit to a Current Report on Form 8-K (i) any underwriting, remarketing or agency agreement relating to securities offered hereby, (ii) the instruments setting forth the terms of any debt securities, preferred stock or warrants, (iii) any additional required opinions of counsel with respect to legality of the securities offered hereby, (iv) the Statement of Eligibility under the Trust Indenture Act of 1939 of the Subordinated Trustee on Form T-1 and (v) any required opinion of counsel to Westlake as to certain tax matters relative to securities offered hereby.

* Incorporated herein by reference as indicated.

** Incorporated by reference to Westlake’s Registration Statement on Form S-4 filed on September 22, 2003, Registration No. 333-108982.

*** Incorporated by reference to Westlake’s Registration Statement on Form S-3/A filed on November 23, 2005, Registration No. 333-124581.

**** Incorporated by reference to Westlake’s Registration Statement on Form S-3/A filed on May 3, 2005, Registration No. 333-124581.

***** Incorporated by reference to Westlake’s Registration Statement on Form S-3 filed on April 11, 2008, Registration No. 333-150206.

****** Incorporated by reference to Westlake’s Registration Statement on Form S-3 filed on September 30, 2011, Registration No. 333-177119.

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Item 17. Undertakings.

(a) The undersigned registrant hereby undertakes:

(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:

(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) of the Securities Act if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective Registration Statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;

provided, however, that the undertakings set forth in paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

(4) That, for the purpose of determining liability under the Securities Act to any purchaser:

(i) Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or

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prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(5) That, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities:

The undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) Any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

(d) The undersigned registrant hereby undertakes to file an application for the purpose of determining the eligibility of the trustee under an Indenture to act under subsection (a) of Section 310 of the Trust Indenture Act of 1939 (the “Act”) in accordance with the rules and regulations prescribed by the Commission under Section 305(b)(2) of the Act.

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SIGNATURES

Pursuant to the requirements of the Securities Act, each of the registrants certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on the 9th day of September, 2013.

WESTLAKE CHEMICAL CORPORATION
By:	/s/ Albert Chao
	Name: Albert Chao Title: President and Chief Executive Officer

Pursuant to the requirements of the Securities Act, this registration statement has been signed by the following persons in the capacities indicated on the 9th day of September, 2013.

Signature	Title
/s/ Albert Chao Albert Chao	President, Chief Executive Officer and Director (Principal Executive Officer)
* M. Steven Bender	Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)
* George J. Mangieri	Vice President, Chief Accounting Officer (Principal Accounting Officer)
* James Chao	Chairman of the Board of Directors
* Robert T. Blakely	Director
* Michael J. Graff	Director
* Dorothy C. Jenkins	Director
* Max L. Lukens	Director
* R. Bruce Northcutt	Director
* H. John Riley, Jr.	Director

* Albert Chao hereby signs this registration statement on behalf of the indicated persons for whom he is attorney-in-fact on September 9, 2013 pursuant to a power of attorney filed herewith.

By:	/s/ Albert Chao
	Attorney-in-fact

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Pursuant to the requirements of the Securities Act, each of the registrants certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on the 9th day of September, 2013.

Pursuant to the requirements of the Securities Act, this registration statement has been signed by the following persons in the capacities indicated on the 9th day of September, 2013.

WESTLAKE VINYLS COMPANY LP
By:	GVGP, Inc., its general partner
By:	/s/ Albert Chao
	Albert Chao President of the general partner of the above Guarantor

WESTLAKE GEISMAR POWER COMPANY LLC
By:	Westlake Vinyls Company LP, its manager
By:	GVGP, Inc., its general partner
By:	/s/ Albert Chao
	Albert Chao President of the general partner of the manager of the above Guarantor

WESTLAKE PETROCHEMICALS LLC WESTLAKE POLYMERS LLC WESTLAKE STYRENE LLC WPT LLC WESTLAKE PIPELINE INVESTMENTS LLC
By:	Westlake Chemical Investments, Inc., its manager
By:	/s/ Albert Chao
	Albert Chao President of the manager of each of the above Guarantors

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GEISMAR HOLDINGS, INC. WESTLAKE DEVELOPMENT CORPORATION GVGP, INC. WESTLAKE CHEMICAL INVESTMENTS, INC. WESTLAKE MANAGEMENT SERVICES, INC. WESTLAKE OLEFINS CORPORATION WESTLAKE RESOURCES CORPORATION WESTLAKE VINYL CORPORATION WESTLAKE NG I CORPORATION WESTLAKE NG IV CORPORATION WESTLAKE NG V CORPORATION
By:	/s/ Albert Chao
	Albert Chao President of each of the above Guarantors

WESTLAKE PVC CORPORATION WESTLAKE VINYLS, INC. WESTLAKE LONGVIEW CORPORATION WESTLAKE ETHYLENE PIPELINE CORPORATION WESTLAKE SUPPLY AND TRADING COMPANY
By:	/s/ Albert Chao
	Albert Chao President of each of the above Guarantors

NORTH AMERICAN PIPE CORPORATION WESTECH BUILDING PRODUCTS, INC.
By:	*
	Robert F. Buesinger President of each of the above Guarantors

NORTH AMERICAN SPECIALTY PRODUCTS LLC
By:	North American Pipe Corporation, its manager
By:	*
	Robert F. Buesinger President of the manager of the above Guarantor

* Albert Chao hereby signs this registration statement on behalf of the indicated persons for whom he is attorney-in-fact on September 9, 2013 pursuant to a power of attorney filed herewith.

By:	/s/ Albert Chao
	Attorney-in-fact

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INDEX TO EXHIBITS†

Exhibit No.	Exhibit Description
1.1†	Form of Underwriting Agreement, relating to equity securities.
1.2†	Form of Underwriting Agreement, relating to debt securities.
3.1(a)**	Certificate of Incorporation of Geismar Holdings, Inc. as filed with the Delaware Secretary of State on December 26, 2002.
3.1(b)******	By-Laws of Geismar Holdings, Inc.
3.2(a)**	Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on January 2, 2003.
3.2(b)**	Certificate of Amendment to the Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on January 8, 2003.
3.2(c)***	Certificate of Amendment to the Certificate of Limited Partnership of Westlake Vinyls Company LP as filed with the Delaware Secretary of State on August 1, 2005.
3.2(d)**	Agreement of Limited Partnership of Westlake Vinyls Company LP, dated as of December 27, 2002.
3.3(a)**	Certificate of Incorporation of GVGP, Inc. as filed with the Delaware Secretary of State on December 26, 2002.
3.3(b)******	By-Laws of GVGP, Inc.
3.4(a)**	Certificate of Incorporation of North American Pipe Corporation as filed with the Delaware Secretary of State on May 29, 1992.
3.4(b)**	Certificate of Amendment to the Certificate of Incorporation of North American Pipe Corporation as filed with the Delaware Secretary of State on July 7, 1992.
3.4(c)******	Bylaws of North American Pipe Corporation.
3.5(a)**	Certificate of Incorporation of Westech Building Products, Inc. as filed with the Delaware Secretary of State on May 25, 1994.
3.5(b)**	Certificate of Amendment to the Certificate of Incorporation of Westech Building Products, Inc. as filed with the Delaware Secretary of State on May 6, 1996.
3.5(c)******	By-Laws of Westech Building Products, Inc.
3.6(a)**	Certificate of Incorporation of Westlake Chemical Investments, Inc. as filed with the Delaware Secretary of State on December 13, 2000.
3.6(b)**	By-Laws of Westlake Chemical Investments, Inc.
3.7(a)**	Certificate of Incorporation of Westlake Development Corporation as filed with the Delaware Secretary of State on December 13, 2000.
3.7(b)******	By-Laws of Westlake Development Corporation.
3.8(a)******	Certificate of Conversion of Westlake Geismar Power Company LLC as filed with the Delaware Secretary of State on January 12, 2011.
3.8(b)******	Certificate of Formation of Westlake Geismar Power Company LLC as filed with the Delaware Secretary of State on January 12, 2011.
3.8(c)******	Limited Liability Company Agreement of Westlake Geismar Power Company LLC, dated January 12, 2011.

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Exhibit No.	Exhibit Description
3.9(a)****	Certificate of Incorporation of Westlake Supply and Trading Company as filed with the Delaware Secretary of State on July 20, 1992.
3.9(b)*****	Certificate of Amendment to the Certificate of Incorporation of Westlake Supply and Trading Company as filed with the Delaware Secretary of State on May 8, 2007.
3.9(c)****	Bylaws of Westlake Supply and Trading Company.
3.10(a)**	Certificate of Incorporation of Westlake Management Services, Inc. as filed with the Delaware Secretary of State on November 5, 1990.
3.10(b)******	Bylaws of Westlake Management Services, Inc.
3.11(a)**	Certificate of Incorporation of Westlake Olefins Corporation as filed with the Delaware Secretary of State on May 15, 1989.
3.11(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Olefins Corporation as filed with the Delaware Secretary of State on July 20, 1992.
3.11(c)**	By-Laws of Westlake Olefins Corporation.
3.12(a)*****	Certificate of Conversion of Westlake Petrochemicals LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.12(b)*****	Certificate of Formation of Westlake Petrochemicals LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.12(c)*****	Limited Liability Company Agreement of Westlake Petrochemicals LLC, dated December 31, 2007.
3.13(a)******	Certificate of Formation of Westlake Pipeline Investments LLC as filed with the Delaware Secretary of State on August 31, 2010.
3.13(b)******	Limited Liability Company Agreement of Westlake Pipeline Investments LLC, dated August 31, 2010.
3.14(a)*****	Certificate of Conversion of Westlake Polymers LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.14(b)*****	Certificate of Formation of Westlake Polymers LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.14(c)*****	Limited Liability Company Agreement of Westlake Polymers LLC, dated December 31, 2007.
3.15(a)**	Certificate of Incorporation of Westlake PVC Corporation as filed with the Delaware Secretary of State on August 19, 1991.
3.15(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake PVC Corporation as filed with the Delaware Secretary of State on August 20, 1991.
3.15(c)******	Bylaws of Westlake PVC Corporation.
3.16(a)**	Certificate of Incorporation of Westlake Resources Corporation as filed with the Delaware Secretary of State on October 23, 1990.
3.16(b)******	Bylaws of Westlake Resources Corporation.
3.17(a)*****	Certificate of Conversion of Westlake Styrene LLC as filed with the Delaware Secretary of State on December 31, 2007

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Exhibit No.	Exhibit Description
3.17(b)*****	Certificate of Formation of Westlake Styrene LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.17(c)*****	Limited Liability Company Agreement of Westlake Styrene LLC, dated December 31, 2007.
3.18(a)**	Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on June 8, 1990.
3.18(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on October 18, 1993.
3.18(c)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyl Corporation as filed with the Delaware Secretary of State on November 4, 1993.
3.18(d)**	Bylaws of Westlake Vinyl Corporation.
3.19(a)**	Certificate of Incorporation of Westlake Vinyls, Inc. as filed with the Delaware Secretary of State on July 10, 1997.
3.19(b)**	Certificate of Amendment to the Certificate of Incorporation of Westlake Vinyls, Inc. as filed with the Delaware Secretary of State on September 28, 2001.
3.19(c)******	By-Laws of Westlake Vinyls, Inc.
3.20(a)*****	Certificate of Formation of WPT LLC as filed with the Delaware Secretary of State on December 31, 2007.
3.20(b)*****	Limited Liability Company Agreement of WPT LLC, dated December 31, 2007.
3.21(a)***	Certificate of Incorporation of Westlake NG I Corporation as filed with the Delaware Secretary of State on November 18, 2005.
3.21(b)***	Bylaws of Westlake NG I Corporation.
3.22(a)***	Certificate of Incorporation of Westlake Longview Corporation as filed with the Delaware Secretary of State on November 18, 2005.
3.22(b)***	Certificate of Amendment to Certificate of Incorporation of Westlake Longview Corporation as filed with the Delaware Secretary of State on November 3, 2006.
3.22(c)*****	Bylaws of Westlake Longview Corporation.
3.23(a)*****	Certificate of Incorporation of Westlake Ethylene Pipeline Corporation as filed with the Delaware Secretary of State on October 26, 2006.
3.23(b)*****	Bylaws of Westlake Ethylene Pipeline Corporation.
3.24(a)*****	Certificate of Incorporation of Westlake NG IV Corporation as filed with the Delaware Secretary of State on March 24, 2008.
3.24(b)******	Bylaws of Westlake NG IV Corporation.
3.25(a)*****	Certificate of Incorporation of Westlake NG V Corporation as filed with the Delaware Secretary of State on March 24, 2008.
3.25(b)******	Bylaws of Westlake NG V Corporation.
3.26(a)	Certificate of Formation of North American Specialty Products LLC as filed with the Delaware Secretary of State on April 1, 2013.
3.26(b)	Limited Liability Company Agreement of North American Specialty Products LLC, dated April 1, 2013.

II-15

Exhibit No.	Exhibit Description
4.1*	Amended and Restated Certificate of Incorporation of Westlake as filed with the Delaware Secretary of State on August 6, 2004 (incorporated by reference to Westlake’s Registration Statement on Form S-1/A, filed on August 9, 2004).
4.2*	Amended and Restated Bylaws of Westlake (incorporated by reference to Westlake’s Registration Statement on Form S-1/A, filed on August 9, 2004).
4.3*	Indenture dated as of January 1, 2006 by and among Westlake, the potential subsidiary guarantors listed therein and JPMorgan Chase Bank, National Association, as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on January 13, 2006, File No. 1-32260).
4.4*	Second Supplemental Indenture, dated as of November 1, 2007, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 18, 2007, File No. 1-32260).
4.5*	Form of Westlake’s 6 3⁄4% Senior Notes due 2032 (included in Exhibit 4.4).
4.6*	Third Supplemental Indenture, dated as of July 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on July 8, 2010, File No. 1-32260).
4.7*	Form of Westlake’s 6 1⁄2% Senior Notes due 2029 (included in exhibit 4.7).
4.8*	Fourth Supplemental Indenture, dated as of December 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 8, 2010, File No. 1-32260).
4.9*	Form of Westlake’s 6 1⁄2% Senior Notes due 2035 (included in Exhibit 4.8).
4.10*	Fifth Supplemental Indenture, dated as of December 2, 2010, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Westlake’s Current Report on Form 8-K, filed on December 8, 2010, File No. 1-32260).
4.11*	Form of Westlake’s 6 1⁄2% Senior Notes due 2035 (included in Exhibit 4.10).
4.12*	Sixth Supplemental Indenture, dated as of July 17, 2012, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.2 to Westlake’s Current Report on Form 8-K, filed on July 16, 2012, File No. 1-32260).
4.13*	Form of Westlake’s 3.60% senior notes due 2022 (included in Exhibit 4.12).
4.14*	Seventh Supplemental Indenture, dated as of February 12, 2013, among the Company, the Subsidiary Guarantors (as defined therein) and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.16 to Westlake’s Annual Report on Form 10-K for the fiscal year ended December 31, 2012, filed on February 22, 2013, File No. 1-32260).
4.15*	Form of Indenture between Westlake and the trustee thereunder (the “Subordinated Trustee”), relating to subordinated debt securities (incorporated by reference to Exhibit 1.1 to Westlake’s Registration Statement on Form S-3 filed on May 3, 2005, Registration No. 333-124581).

II-16

Exhibit No.	Exhibit Description
4.16*	Form of Westlake Common Stock Certificate (incorporated by reference to Exhibit 4.1 to Amendment No. 4 to Westlake’s Registration Statement on Form S-1 filed on August 9, 2004, Registration No. 333-115790).
5.1	Opinion of Baker Botts L.L.P. as to the legality of the securities.
10.1*	Form of Registration Rights Agreement between Westlake and TTWF LP (incorporated by reference to Exhibit 10.13 to Westlake’s Registration Statement on Form S-1/A filed on July 2, 2004 under Registration No. 333-115790).
12.1	Statement of computation of ratio of earnings to fixed charges for the years ended December 31, 2012, 2011, 2010, 2009 and 2008 and for the six months ended June 30, 2013.
23.1	Consent of PricewaterhouseCoopers LLP.
23.2	Consent of Baker Botts L.L.P. (included in Exhibit 5.1).
24.1	Powers of Attorney of certain officers and directors of Westlake.
24.2	Powers of Attorney of certain officers and directors of certain Subsidiary Guarantors.
25.1	Statement of Eligibility of Trustee under Trust Indenture Act with respect to the Senior Indenture.

† Westlake will file as an exhibit to a Current Report on Form 8-K (i) any underwriting, remarketing or agency agreement relating to securities offered hereby, (ii) the instruments setting forth the terms of any debt securities, preferred stock or warrants, (iii) any additional required opinions of counsel with respect to legality of the securities offered hereby, (iv) the Statement of Eligibility under the Trust Indenture Act of 1939 of the Subordinated Trustee on Form T-1 and (v) any required opinion of counsel to Westlake as to certain tax matters relative to securities offered hereby.

* Incorporated herein by reference as indicated.

** Incorporated by reference to Westlake’s Registration Statement on Form S-4 filed on September 22, 2003, Registration No. 333-108982.

*** Incorporated by reference to Westlake’s Registration Statement on Form S-3/A filed on November 23, 2005, Registration No. 333-124581.

**** Incorporated by reference to Westlake’s Registration Statement on Form S-3/A filed on May 3, 2005, Registration No. 333-124581.

***** Incorporated by reference to Westlake’s Registration Statement on Form S-3 filed on April 11, 2008, Registration No. 333-150206.

****** Incorporated by reference to Westlake’s Registration Statement on Form S-3 filed on September 30, 2011, Registration No. 333-177119.

II-17

EX-3.26(A)

Exhibit 3.26(a)

CERTIFICATE OF FORMATION

OF

NORTH AMERICAN SPECIALTY PRODUCTS LLC

1. The name of the limited liability company is North American Specialty Products LLC.

2. The address of its registered office in the State of Delaware is: Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, Delaware 19801. The name of its registered agent at such address is The Corporation Trust Company.

IN WITNESS WHEREOF, the undersigned have executed this Certificate of Formation of North American Specialty Products LLC this 1st day of April, 2013.

/s/ Stephen Wallace

Stephen Wallace

EX-3.26(B)

Exhibit 3.26(b)

LIMITED LIABILITY COMPANY AGREEMENT

OF

NORTH AMERICAN SPECIALTY PRODUCTS LLC

THE UNDERSIGNED is executing this Limited Liability Company Agreement (this “Agreement”) for the purpose of forming a limited liability company (the “Company”) pursuant to the provisions of the Delaware Limited Liability Company Act, 6 Del. C. §§ 18-101 et seq. (as amended and in effect from time to time, the “Delaware Act”), and does hereby certify as follows:

1. Name; Formation. The name of the Company shall be North American Specialty Products LLC, or such other name as the Managers may from time to time hereafter designate. The Company shall be formed upon the execution and filing by the Managers, by any person designated by the Managers or by any officer, agent or employee of the registered agent of the Company in the State of Delaware (any such person being hereby authorized to take such action) of a certificate of formation of the Company with the Secretary of State of the State of Delaware setting forth the information required by Section 18-201 of the Delaware Act.

2. Definitions; Rules of Construction. In addition to terms otherwise defined herein, the following terms are used herein as defined below:

“Capital Contribution” means, with respect to any Member, the cash, property, services or promissory obligations (if any) contributed by such Member to the Company in accordance with Section 7 hereof (the amount or agreed value of which is set forth on Schedule I).

“Initial Member” means North American Pipe Corporation.

“Interest” means the ownership interest of a Member in the Company (which shall be considered personal property for all purposes), consisting of (i) such Member’s Percentage Interest in profits, losses, allocations and distributions, (ii) such Member’s right to vote or grant or withhold consents with respect to Company matters as provided herein or in the Delaware Act and (iii) such Member’s other rights and privileges as provided herein or in the Delaware Act.

“Majority in Interest of the Members” means Members whose Percentage Interests aggregate to greater than fifty percent (50%) of the Percentage Interests of all Members.

“Manager” means a manager of the Company as designated in, or selected pursuant to, Section 8(d) hereof. Each Manager shall constitute a ‘manager’, as such term is defined in Section 18-101 of the Delaware Act.

“Members” means the Initial Member and all other persons or entities admitted as additional or substituted Members pursuant to this Agreement, so long as they remain Members. Reference to a “Member” means any one of the Members.

“Percentage Interest” means a Member’s share of the profits and losses of the Company and the Member’s percentage right to receive distributions of the Company’s assets. The Percentage Interest of each Member shall be the percentage set forth opposite such Member’s name on Schedule I, as such Schedule shall be amended from time to time in accordance with the provisions hereof. The combined Percentage Interest of all Members shall at all times equal one hundred percent (100%).

Words used herein, regardless of the number and gender used, shall be deemed and construed to include any other number, singular or plural, and any other gender, masculine, feminine or neuter, as the context requires, and, as used herein, unless the context requires otherwise, the words “hereof,” “herein,” and “hereunder” and words of similar import shall refer to this Agreement as a whole and not to any particular provisions hereof.

3. Purpose. The business and purpose of the Company shall be to invest Company assets in, and to acquire, hold, dispose of, manage or otherwise exercise rights with respect to, property of any nature, real or personal, and to engage in such other activities as may be necessary or convenient to the conduct, promotion or attainment of the foregoing. The Company may engage in such activities directly or through partnerships, funds, joint ventures or other business structures. The Company may also engage in any other businesses or activities that may be engaged in by a limited liability company formed under the Delaware Act, as such other activities may be approved from time to time by the Managers.

4. Offices.

(a) The principal office of the Company, and such additional offices as the Managers may determine to establish, shall be located at such place or places inside or outside the State of Delaware as the Managers may designate from time to time.

(b) The registered office of the Company in the State of Delaware is located at 1209 Orange Street, Wilmington, New Castle County, Delaware 19801. The registered agent of the Company for service of process at such address is The Corporation Trust Company. The Managers may change such registered office and/or registered agent from time to time.

5. Members. The name and business or residence address of each Member of the Company is as set forth on Schedule I, as the same may be amended from time to time.

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6. Term. The term of the Company shall be perpetual unless the Company is dissolved and terminated in accordance with Section 15 of this Agreement.

7. Capital Contributions; Capital Accounts; Administrative Matters.

(a) The Initial Member has contributed to the Company the cash, property, services or promissory obligations set forth or referenced on Schedule I. Except as otherwise agreed by the Managers, the Initial Member shall have no right or obligation to make any further capital contributions to the Company. Persons or entities hereafter admitted as Members of the Company shall make such contributions of cash, property, services or promissory obligations to the Company as shall be determined by the Managers, at the time of each such admission.

(b) As of the date of this Agreement, the Initial Member is the sole Member of the Company. At all times that the Company has only one Member, the Company shall be disregarded for federal and, where applicable, state, local and foreign income tax purposes and all items of income, gain, loss, deduction, credit or the like of the Company shall be treated as items of income, gain, loss, deduction, credit or the like of the Member.

(c) If at any time the Company has more than one Member, it is the intention of the Members that the Company shall be taxed as a “partnership” for federal and, where applicable, state, local and foreign income tax purposes, and the following provisions shall apply:

(i) A single, separate capital account shall be established and maintained for each Member. Each Member’s capital account shall be credited with the amount of money and the fair market value of property (net of any liabilities secured by such contributed property that the Company assumes or takes subject to) contributed by that Member to the Company; the amount of any Company liabilities assumed by such Member (other than in connection with a distribution of Company property); and such Member’s distributive share of Company profits (including tax exempt income). Each Member’s capital account shall be debited with the amount of money and the fair market value of property (net of any liabilities that such Member assumes or takes subject to) distributed to such Member; the amount of any liabilities of such Member assumed by the Company (other than in connection with a contribution); and such Member’s distributive share of Company losses (including items that may be neither deducted nor capitalized for federal income tax purposes).

(ii) Notwithstanding any provision of this Agreement to the contrary, each Member’s capital account shall be maintained and adjusted in accordance with the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), and the regulations thereunder (the “Regulations”), including, without limitation, (x) the adjustments permitted or required by Internal Revenue Code Section 704(b) and, to the extent applicable, the principles expressed in Internal Revenue Code Section 704(c) and (y) adjustments required to maintain capital accounts in accordance with the “substantial economic effect test” set forth in the Regulations under Internal Revenue Code Section 704(b). No Member shall have any obligation to contribute any amount to the Company in the event of a negative balance of its capital

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account, and the Members’ intend to use a “qualified income offset” provision as defined in Section 1.704-1(b)(2)(ii)(d) of the Regulations.

(iii) Any Member, including any substitute Member, who shall receive an Interest (or whose Interest shall be increased) by means of a transfer to him of all or a part of the Interest of another Member, shall have a capital account that reflects the capital account associated with the transferred Interest (or the applicable percentage thereof in case of a transfer of a part of an Interest).

(iv) All items of Company income, gain, loss, deduction, credit or the like shall be allocated among the Members in accordance with their respective Percentage Interests as set forth on Schedule I.

(d) The fiscal year of the Company shall be a calendar year. Unless otherwise determined by the Managers, the books and records of the Company shall be maintained in accordance with generally accepted accounting principles.

(e)    (i) Each Member’s Interest shall be recorded on the books of the Company and, unless otherwise determined by the Managers, no certificate evidencing a Member’s Interest in the Company (each, a “Certificate”) shall be issued. The Company shall keep or cause to be kept a register in which, subject to such regulations as the Managers may adopt, the Company will provide for the registration of Interests and the registration of transfers of Interests. The Company shall maintain such register and provide for such registration. The books of the Company shall be conclusive evidence of the ownership of all Interests in the Company. Subject to the further terms of this Agreement, including the restrictions and limitations on transfer set forth in Section 10 hereof, the Interests in the Company shall be transferable on the books of the Company by the record holder thereof or by its duly authorized agent upon delivery to the Company of a duly executed instrument of transfer, a written agreement of the transferee to be bound by all terms and conditions hereof and such other instruments as the Managers may reasonably require and such evidence of the genuineness of the execution and authorization of the foregoing as may be required by the Managers. Subject to the further terms of this Agreement, including the restrictions and limitations on transfer set forth in Section 10 hereof, upon delivery of the foregoing instruments and compliance with the foregoing conditions, the transfer shall be recorded on the books of the Company. Until a transfer is so recorded, the owners of record of Interests shall be deemed to be the owners for all purposes hereunder and neither any Member nor the Company shall be affected by any notice of a proposed transfer.

(ii) In the event that the Managers determine to issue Certificates, the following shall apply:

(A) Each Certificate shall be executed by such persons as are designated by the Managers.

(B) Upon surrender for registration of transfer of any Certificate, and subject to the further provisions of this Section 7(e) and the limitations on transfer contained elsewhere in this Agreement, the Company will cause the execution, in the name of the

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registered holder or the designated transferee, of one or more new Certificates, evidencing the same aggregate Percentage Interest as did the Certificate surrendered. Every Certificate surrendered for registration of transfer shall be duly endorsed, or be accompanied by a written instrument of transfer in form satisfactory to the Managers duly executed, by the registered holder thereof or such holder’s authorized attorney.

(C) The Company shall issue a new Certificate in place of any Certificate previously issued if the record holder of the Certificate (w) makes proof by affidavit, in form and substance satisfactory to the Managers, that a previously issued Certificate has been lost, destroyed or stolen, (x) requests the issuance of a new Certificate before the Company has received notice that the Certificate has been acquired by a purchaser for value in good faith and without notice of an adverse claim, (y) if requested by the Managers, delivers to the Company a bond, in form and substance satisfactory to the Managers, with such surety or sureties and with fixed or open liability as the Managers may direct, to indemnify the Company, as registrar, against any claim that may be made on account of the alleged loss, destruction or theft of the Certificate, and (z) satisfies any other reasonable requirements imposed by the Managers.

(iii) An Interest in the Company evidenced by a Certificate shall constitute a security for all purposes of Article 8 of the Uniform Commercial Code promulgated by the National Conference of Commissioners on Uniform State Laws, as in effect in Delaware or any other applicable jurisdiction (the “UCC”). An Interest in the Company not evidenced by a Certificate shall not constitute a security for all purposes of Article 8 of the UCC. Delaware law shall constitute the local law of the Company’s jurisdiction in its capacity as the issuer of Interests.

8. Management of the Company.

(a) Subject to the delegation of rights and powers as provided for herein and except as otherwise herein provided, management of the Company is vested in the Managers and the Managers shall have the sole right and authority to manage and conduct the business and affairs of the Company and shall have all powers and rights necessary, appropriate or advisable to effectuate and carry out the purposes, powers, business and other activities of the Company. The Managers may appoint, employ or otherwise contract with any persons or entities for the transaction of the business of the Company or the performance of services for or on behalf of the Company, and the Managers may delegate to any such person (who may be designated an officer of the Company) or entity such authority to act on behalf of the Company as the Managers may from time to time deem appropriate. No Member, by reason of its status as such, shall have any authority to act for or bind the Company or otherwise take part in the management of the business or affairs of the Company.

(b) Without limitation of Section 8(a), the powers of the Managers shall include the power to do or cause the Company to do any of the following:

(i) expend Company funds in connection with the operation of the business of the Company or otherwise pursuant to this Agreement;

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(ii) employ and dismiss from employment any and all officers, employees, agents, independent contractors, attorneys and accountants;

(iii) prosecute, settle or compromise all claims against third parties, defend, compromise, settle or accept judgment on claims against the Company and execute all documents and make all representations, admissions and waivers in connection therewith;

(iv) borrow money on behalf of the Company from any person, issue promissory notes, drafts and other negotiable and non-negotiable instruments and evidences of indebtedness, secure payment of any such indebtedness by mortgage, pledge or assignment of property of the Company, whether at the time owned or thereafter acquired, or guarantee the obligations of others;

(v) hold, receive, mortgage, pledge, lease, transfer, exchange, otherwise dispose of, grant options with respect to, and otherwise deal in and exercise all rights, powers, privileges and other incidents of ownership or possession with respect to all property of whatever nature held or owned by, or licensed to, the Company;

(vi) have and maintain one or more offices at such place or places as is determined by the Managers;

(vii) open, maintain and close bank accounts, money market accounts or investment, custody or other financial accounts and draw checks and other orders for the payment of monies;

(viii) engage accountants, custodians, consultants and attorneys and any and all other agents and assistants (professional and nonprofessional) and pay such compensation in connection with such engagements that the Managers determine is appropriate;

(ix) maintain such insurance relating to the business of the Company, upon such terms, as the Managers determine is appropriate; and

(x) enter into, execute, make, amend, supplement, acknowledge, deliver and cause the Company to perform any and all contracts, agreements, licenses and other instruments, undertakings and understandings that the Managers determine are necessary, appropriate or incidental to carrying on the business and affairs of the Company.

(c) The Managers may authorize any Manager(s), Member(s), officer(s), agent(s) or employee(s) to enter into any contract, to execute any instrument or certificate (including any certificate to be filed on behalf of the Company with the Secretary of State of the State of Delaware under the Delaware Act) or to take any other action in the name of and on behalf of the Company, and this authority may be general or confined to specific instances. Unless so authorized or ratified by the Managers or within the agency power of an officer, no Manager, Member, officer, agent or employee shall have any power or authority to bind the Company by any contract or engagement or to pledge its credit or to render it liable for any purpose or for any amount.

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(d) The number of Managers of the Company shall be as set forth on Schedule II or such other number as the Managers shall determine from time to time. The initial Manager or Managers are identified on Schedule II. Managers shall serve until their respective successors are duly elected by the Members or until their earlier death, retirement, incapacity or removal. Managers may be removed with or without cause by a vote of a Majority in Interest of the Members. Vacancies in the number of Managers from whatever cause shall be filled by a vote of a Majority in Interest of the Members. The Managers shall amend Schedule II from time to time to reflect changes in the number or identity of Managers made in accordance with the provisions of this Section 8(d).

(e) Except as to actions herein specified to be taken by all of the Managers or by the Managers acting unanimously, the duties and powers of the Managers may be exercised by a majority in number of all Managers (or by any Manager acting pursuant to authority delegated by a majority in number of the Managers). Notwithstanding any other provision of this Agreement, at any time that there is only one Manager, (i) any and all actions provided for herein to be taken or approved by the “Managers” shall be taken or approved by the sole Manager and (ii) the taking of any lawful action by the Manager on behalf of the Company, including the execution and/or delivery of any instrument, certificate, filing or document by the Manager on behalf of the Company, or the adoption by the Manager of authorizing resolutions with respect to any matter, shall constitute and evidence the due authorization of such action or matter on behalf of the Company.

(f) Regular meetings of the Managers shall be held in accordance with a schedule of meetings to be adopted by resolution of the Managers and no notice of any such regular meeting shall be required. Special meetings of the Managers may be called by any Manager upon not less than two (2) business days prior written notice to all Managers stating the purpose or purposes thereof; provided that any Manager may waive such notice prior to, at or after the meeting. The presence in person of a majority in number of all managers shall constitute a quorum for the transaction of business at any meeting of Managers, except that the presence of all Managers shall be required as to actions herein specified to be taken all of the Managers or by the Managers acting unanimously. Any meeting of Managers may be held by conference telephone or similar communication equipment so long as all Managers participating in the meeting can hear one another, and all Managers participating by telephone or similar communication equipment shall be deemed to be present in person at the meeting. In lieu of a meeting, any action to be taken by the Managers may be taken by a consent in writing setting forth the action so taken executed by such number of Managers as would be required to take such action in accordance with the terms of this Agreement or the Delaware Act. Any such written consent may be executed and delivered by telecopy or similar electronic means and may be signed in multiple counterparts. If any action is taken by the Managers by the written consent of less than all of the Managers, prompt notice of the taking of such action shall be furnished to each Manager who did not execute such written consent (provided that the effectiveness of such action shall not be impaired by any delay or failure to furnish such notice).

(g) A Manager shall be fully protected in relying in good faith upon the records of the Company and upon such information, opinions, reports or statements presented to the Company by any of its other Managers or its Members, officers, employees or committees, or by any other person as to matters the Manager reasonably believes are within such other

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person’s professional or expert competence and who has been selected with reasonable care by or on behalf of the Company (including, without limitation, information, opinions, reports or statements as to the value and the amount of the assets, liabilities, profits or losses of the Company or any other facts pertinent to the existence and amount of assets from which distributions to Members might properly be paid). In addition, the Managers may consult with legal counsel, accountants, appraisers, management consultants, investment bankers and other consultants and advisors selected by them, and any opinion of any such person as to matters which the Managers reasonably believe to be within such person’s professional or expert competence shall be full and complete authorization and protection in respect of any action taken or suffered or omitted by the Managers hereunder in good faith and in accordance with such opinion.

9. Member Approvals; Meetings of Members.

(a) Members shall have no right to vote or consent to any matters, including, without limitation, any merger, consolidation, conversion or other reorganization of the Company, except to the extent required by applicable law or as specifically set forth in this Agreement.

(b) Any action required to be taken by the Members under applicable law may be taken by vote of the Members at a meeting. Meetings may be called by the Managers upon not less than five (5) days prior written notice to all other Members. The notice shall specify the place and time of the meeting and the general nature of the business to be transacted. A written waiver of notice, signed by a Member, whether before or after the time stated therein, shall be deemed equivalent to notice to such Member. Unless otherwise determined by the Managers, meetings of Members shall be held at the principal place of business of the Company. Meetings of the Members may be held by conference telephone or similar communication equipment so long as all Members participating in the meeting can hear one another, and all Members participating by telephone or similar communication equipment shall be deemed to be present in person at the meeting. At any meeting of Members, a Majority in Interest of the Members, present in person or by proxy, shall constitute a quorum for all purposes, except that the presence of all Members shall be required as to actions to be taken by all of the Members or by the Members acting unanimously. In lieu of a meeting, any action to be taken by the Members may be taken by a consent in writing setting forth the action so taken signed by a Majority in Interest of the Members (or Members holding such higher aggregate Percentage Interest as is required to authorize or take such action under applicable law). Any such written consent may be executed and delivered by telecopy or similar electronic means and may be signed in multiple counterparts.

10. Assignments of Company Interests.

(a) No Member may sell, assign, pledge or otherwise transfer or encumber (collectively “transfer”) all or any part of its Interest in the Company, and no transferee of all or any part of the Interest of a Member shall be admitted as a substituted Member, without, in either event, having obtained the prior consent of all Managers.

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(b) The Managers shall amend Schedule I from time to time to reflect transfers made in accordance with, and as permitted under, this Section 10. Any purported transfer in violation of this Section 10 shall be null and void and shall not be recognized by the Company.

11. Resignation. No Member shall have the right to resign from the Company except with the consent of all Managers and upon such terms and conditions as may be specifically agreed upon between the Managers and the resigning Member. The provisions hereof with respect to distributions upon resignation are exclusive and no Member shall be entitled to claim any further or different distribution upon resignation under Section 18-604 of the Delaware Act or otherwise. A Manager may resign at any time upon giving the Company not less than ten (10) days prior notice of the effective date of resignation.

12. Additional Members. The Managers shall have the right to admit additional Members upon such terms and conditions, at such time or times, and for such Capital Contributions as shall be determined by such Members; and in connection with any such admission, the Managers shall amend Schedule I to reflect the name, address and Capital Contribution of the additional Member and any agreed upon changes in Percentage Interests.

13. Distributions. Distributions of cash or other assets of the Company shall be made at such times and in such amounts as the Managers acting unanimously may determine. Distributions shall be made to the Members pro rata in accordance with their respective Percentage Interests.

14. Return of Capital. No Manager or Member shall have any liability for the return of any Member’s Capital Contribution, which Capital Contribution shall be payable solely from the assets of the Company.

15. Dissolution. The Company shall be dissolved and its affairs wound up and terminated upon the first to occur of the following:

(a) The determination of the Managers to dissolve the Company; or

(b) The occurrence of any event causing a dissolution of the Company under Section 18-801 of the Delaware Act, unless the Company is continued as permitted under the Delaware Act.

16. Winding Up of the Company.

(a) If the Company is dissolved pursuant to Section 15, the Managers shall proceed to wind up the business and affairs of the Company in accordance with the requirements of the Delaware Act. A reasonable amount of time shall be allowed for the period of winding up in light of prevailing market conditions and so as to avoid undue loss in connection with any sale of Company assets. This Agreement shall remain in full force and effect and continue to govern the rights and obligations of the Managers and Members and the conduct of the Company during the period of winding up the Company’s affairs. The Managers shall liquidate the assets of the Company, and apply and distribute the proceeds of such liquidation in the following order of priority, unless otherwise required by mandatory provisions of applicable law:

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(i) to creditors, including Managers and Members who are creditors, to the extent otherwise permitted by law, in satisfaction of the liabilities of the Company (whether by payment, by the establishment of reserves of cash or other assets of the Company or by other reasonable provision for payment), other than liabilities for distributions to Members and former Members under Sections 18-601 or 18-604 of the Delaware Act;

(ii) to Members and former Members in satisfaction of liabilities for distributions under 18-601 or 18-604 of the Delaware Act; and

(iii) thereafter to the Member, if only one, or if more than one, to the Members in proportion to the positive balances of their respective Capital Accounts (determined after allocating all income, gain, deduction, loss and other like items arising in connection with the liquidation of Company assets and otherwise making all Capital Account adjustments required by Section 7(c)).

(b) Notwithstanding the provisions of Section 16(a) which require the liquidation of the assets of the Company, if on dissolution of the Company, the Managers determine that a prompt sale of part or all of the Company’s assets would be impractical or would cause undue loss to the value of Company assets, the Managers may defer for a reasonable time (up to three (3) years) the liquidation of any assets, except those necessary to timely satisfy liabilities of the Company (other than those to Members), and/or may distribute to the Members, in lieu of cash, as tenants in common, undivided interests in such Company assets as the Managers deems not suitable for liquidation. Any such in-kind distributions (i) shall be made in accordance with the priorities referenced in Section 16(a) as if cash equal to the fair market value of the distributed assets were being distributed and (ii) shall be subject to such conditions relating to the disposition and management of the distributed properties as the Managers deems reasonable and equitable and to any joint operating agreements or other agreements governing the operation of such properties at such time. The Managers shall determine the fair market value of any property distributed in kind using such reasonable methods of valuation as they may adopt.

(c) Upon the completion of the distribution of the assets of the Company as provided in this Section 16, the Company shall be terminated, and the Managers shall cause the cancellation of the Certificate of Formation and all qualifications of the Company as a foreign limited liability company and shall take such other actions as may be necessary to terminate the Company.

17. Limitation on Liability. The debts, obligations and liabilities of the Company, whether arising in contract, tort or otherwise, shall be solely the debts, obligations and liabilities of the Company, and no Manager, Member or officer of the Company shall be obligated personally for any such debt, obligation or liability of the Company solely by reason of being a Manager, Member or officer.

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18. Standard of Care; Indemnification of Managers, Officers, Employees and Agents

(a) No Manager or officer shall have any personal liability whatsoever to the Company or any Member on account of such Manager’s or officer’s status as a Manager or officer or by reason of such Manager’s or officer’s acts or omissions in connection with the conduct of the business of the Company; provided, however, that nothing contained herein shall protect any Manager or officer against any liability to the Company or the Members to which such Manager or officer would otherwise be subject by reason of (i) any act or omission of such Manager or officer that involves actual fraud or willful misconduct or (ii) any transaction from which such Manager or officer derived improper personal benefit.

(b) The Company shall indemnify and hold harmless the Managers and each officer and the affiliates of any Managers or officer (each an “Indemnified Person”) against any and all losses, claims, damages, expenses and liabilities (including, but not limited to, any investigation, legal and other reasonable expenses incurred in connection with, and any amounts paid in settlement of, any action, suit, proceeding or claim) of any kind or nature whatsoever that such Indemnified Person may at any time become subject to or liable for by reason of the formation, operation or termination of the Company, or the Indemnified Person’s acting as a Managers or officer under this Agreement, or the authorized actions of such Indemnified Person in connection with the conduct of the affairs of the Company (including, without limitation, indemnification against negligence, gross negligence or breach of duty); provided, however, that no Indemnified Person shall be entitled to indemnification if and to the extent that the liability otherwise to be indemnified for results from (i) any act or omission of such Indemnified Person that involves actual fraud or willful misconduct or (ii) any transaction from which such Indemnified Person derived improper personal benefit. The indemnities provided hereunder shall survive termination of the Company and this Agreement. Each Indemnified Person shall have a claim against the property and assets of the Company for payment of any indemnity amounts from time to time due hereunder, which amounts shall be paid or properly reserved for prior to the making of distributions by the Company to Members. Costs and expenses that are subject to indemnification hereunder shall, at the request of any Indemnified Person, be advanced by the Company to or on behalf of such Indemnified Person prior to final resolution of a matter, so long as such Indemnified Person shall have provided the Company with a written undertaking to reimburse the Company for all amounts so advanced if it is ultimately determined that the Indemnified Person is not entitled to indemnification hereunder.

(c) The contract rights to indemnification and to the advancement of expenses conferred in this Section 18 shall not be exclusive of any other right that any person may have or hereafter acquire under any statute, agreement, vote of the Managers or otherwise.

(d) The Company may maintain insurance, at its expense, to protect itself and any Member, officer, employee or agent of the Company or another limited liability company, corporation, partnership, joint venture, trust or other enterprise against any expense, liability or loss, whether or not the Company would have the power to indemnify such person against such expense, liability or loss under the Delaware Act.

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(e) The Company may, to the extent authorized from time to time by the Managers, grant rights to indemnification and to advancement of expenses to any employee or agent of the Company to the fullest extent of the provisions of this Section 18 with respect to the indemnification and advancement of expenses of the Managers and officers of the Company.

(f) Notwithstanding the foregoing provisions of this Section 18, the Company shall indemnify an Indemnified Person in connection with a proceeding (or part thereof) initiated by such Indemnified Person only if such proceeding (or part thereof) was authorized by the Managers; provided, however, that an Indemnified Person shall be entitled to reimbursement of his or her reasonable counsel fees with respect to a proceeding (or part thereof) initiated by such Indemnified Person to enforce his or her right to indemnity or advancement of expenses under the provisions of this Section 18 to the extent the Indemnified Person is successful on the merits in such proceeding (or part thereof).

19. Amendments. This Agreement may be amended only upon the written consent of all Managers.

20. Governing Law. This Agreement shall be governed by and construed in accordance with the domestic laws of the State of Delaware without giving effect to any choice of law or conflict of law provision or rule (whether of the State of Delaware or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of Delaware. This Agreement constitutes an agreement of or among the Member(s) and between the Company and each Member.

[Signature Page Follows]

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IN WITNESS WHEREOF, the undersigned has duly executed this Agreement as of this 1^st day of April, 2013.

NORTH AMERICAN PIPE CORPORATION
By:	/s/ Robert F. Buesinger
	Name:	Robert F. Buesinger
	Title:	President

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SCHEDULE I

Identification of Members,

Capital Contributions and Percentage Interests

Name & Address	Capital Contribution	Percentage Interest
North American Pipe Corporation 2801 Post Oak Boulevard Suite 600 Houston, Texas 77056	$100	100%

SCHEDULE II

Managers

A. Number of Managers: 1

B. Identification of Managers: North American Pipe Corporation

EX-5.1

Exhibit 5.1

  Exhibit 5.1 ONE SHELL
PLAZA 910 LOUISIANA HOUSTON, TEXAS 77002-4995   TEL +1 713.229.1234 FAX +1 713.229.1522 BakerBotts.com ABU DHABI
AUSTIN BEIJING BRUSSELS DALLAS DUBAI HONG KONG HOUSTON
LONDON MOSCOW NEW YORK PALO ALTO RIO DE JANEIRO RIYADH WASHINGTON

September 9, 2013

Westlake Chemical Corporation

2801 Post Oak Boulevard, Suite 600

Houston, Texas 77056

Ladies and Gentlemen:

As set forth in the Registration Statement on Form S-3 (the “Registration Statement”) to be filed by Westlake Chemical Corporation, a Delaware corporation (the “Company”), and the subsidiary guarantors named in Schedule I hereto (the “Subsidiary Guarantors”) with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), relating to securities that may be issued and sold by the Company and the Subsidiary Guarantors, and 4,500,000 currently outstanding shares of common stock, par value $0.01 per share, of the Company (the “Common Stock”) that may be sold by the selling stockholder identified in the Registration Statement (the “Selling Stockholder”) from time to time pursuant to Rule 415 under the Act, certain legal matters in connection with such securities are being passed upon for you by us. Such securities include (i) unsecured senior debt securities of the Company (the “Senior Debt Securities”), (ii) unsecured subordinated debt securities of the Company (the “Subordinated Debt Securities” and, together with the Senior Debt Securities, the “Debt Securities”), (iii) guarantees of the Debt Securities (the “Subsidiary Guarantees”) by Subsidiary Guarantors, (iv) shares of preferred stock, par value $0.01 per share, of the Company (the “Preferred Stock”), (v) shares of Common Stock and (vi) warrants to purchase any combination of Debt Securities, Common Stock, Preferred Stock and other securities (the “Warrants”). The Debt Securities, the Subsidiary Guarantees, the Preferred Stock, the Common Stock and the Warrants are collectively referred to herein as the “Securities.” At your request, this opinion is being furnished to you for filing as Exhibit 5.1 to the Registration Statement.

Each series of Debt Securities will be issued:

(i) in the case of the Senior Debt Securities, pursuant to an indenture dated as of January 1, 2006, as amended or supplemented from time to time, among the Company, as issuer, the Subsidiary Guarantors, as potential subsidiary guarantors, and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank, National Association), as trustee (the “Senior Indenture”); and

(ii) in the case of the Subordinated Debt Securities, pursuant to an indenture to be entered into among the Company, as issuer, the Subsidiary Guarantors, as potential subsidiary guarantors, and the trustee (the “Subordinated Indenture” and, together with the Senior Indenture, the “Indentures”).

Westlake Chemical Corporation	2	September 9, 2013

Each Indenture will be supplemented, in connection with the issuance of each such series, by a supplemental indenture, officers’ certificate or other writing thereunder establishing the form and terms of such series.

In our capacity as your counsel in the connection referred to above, we have examined originals, or copies certified or otherwise identified, of (i) the Amended and Restated Certificate of Incorporation and the Amended and Restated Bylaws of the Company, each as amended to date (together, the “Charter Documents”), (ii) the charters or bylaws or other organizational documents, as applicable, of each of the Subsidiary Guarantors, (iii) the Senior Indenture and the form of Subordinated Indenture (each as filed as an exhibit to the Registration Statement), and (iv) the corporate, limited partnership or limited liability company records of the Company and the Subsidiary Guarantors, as the case may be, certificates of public officials and of representatives of the Company, including minute books of the Company and the Subsidiary Guarantors as furnished to us by the Company, statutes and other instruments and documents as a basis for the opinions hereinafter expressed. In giving such opinions, we have relied upon certificates of officers of the Company and of public officials with respect to the accuracy of the material factual matters contained in such certificates. In giving the opinions below, we have assumed that the signatures on all documents examined by us are genuine, that all documents submitted to us as originals are accurate and complete, that all documents submitted to us as copies are true and correct copies of the originals thereof and that all information submitted to us was accurate and complete. In connection with this opinion, we have assumed that:

(i) the Registration Statement and any amendments thereto (including post-effective amendments) will have become effective under the Act;

(ii) a prospectus supplement will have been prepared and filed with the Commission describing the Securities offered thereby;

(iii) all Securities will be offered, issued and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement and the applicable prospectus supplement;

(iv) the Board of Directors of the Company and, if applicable, each Subsidiary Guarantor (or the general partner or equivalent thereof) or, to the extent permitted by the charters, bylaws or other organizational documents and the corporation, limited partnership or limited liability company laws of Delaware, a duly constituted and acting committee thereof (such Board of Directors or committee being hereinafter referred to as the “Board”) will have taken all necessary corporate, limited partnership or limited liability company action to authorize the issuance of the Securities and any other Securities issuable on the conversion, exchange, redemption or exercise thereof, and to authorize the terms of the offering and sale of such Securities and related matters;

(v) a definitive purchase, underwriting or similar agreement with respect to any Securities offered will have been duly authorized and validly executed and delivered by the Company, the Subsidiary Guarantors, if applicable, the Selling Stockholder, if applicable, and the other parties thereto (the “Purchase Agreement”);

Westlake Chemical Corporation	3	September 9, 2013

(vi) any securities issuable upon conversion, exchange, redemption or exercise of any Securities being offered will be duly authorized, created and, if appropriate, reserved for issuance upon such conversion, exchange, redemption or exercise;

(vii) all Securities, and any certificates in respect thereof, will be delivered in accordance with either (a) the provisions of the applicable Purchase Agreement approved by the Board upon payment of the consideration therefor provided for therein or (b) upon conversion, exchange, redemption or exercise of any other Security, in accordance with the terms of such Security or the instrument governing such Security providing for such conversion, exchange, redemption or exercise as approved by the Board, for the consideration approved by the Board;

(viii) in the case of shares of Common Stock or Preferred Stock to be issued by the Company, certificates representing such shares will have been duly executed, countersigned, registered and delivered, or if uncertificated, valid book-entry notations will have been made in the share register of the Company, in each case in accordance with the provisions of the Charter Documents; there will be sufficient shares of Common Stock or Preferred Stock authorized under the Charter Documents and not otherwise issued or reserved for issuance; and the purchase price therefor payable to the Company, or, if such shares are issuable on the conversion, exchange, redemption or exercise of another Security, the consideration payable to the Company for such conversion, exchange, redemption or exercise will not be less than the par value of such shares;

(ix) in the case of shares of Preferred Stock of any series, the Board will have taken all necessary corporate action to designate and establish the terms of such series and will have caused a certificate of designations respecting such series to be prepared and filed with the Secretary of State of the State of Delaware;

(x) in the case of Warrants, the Board will have taken all necessary corporate action to authorize the creation of and the terms of such Warrants and the issuance of the Securities to be issued pursuant thereto and to approve the warrant agreement relating thereto; such warrant agreement will have been duly executed and delivered by the Company and the warrant agent thereunder appointed by the Company; neither such Warrants nor such warrant agreement will include any provision that is unenforceable; and such Warrants or certificates representing such Warrants will have been duly executed, countersigned, registered and delivered in accordance with the provisions of such warrant agreement; and

(xi) in the case of Debt Securities of any series issuable under an Indenture:

Westlake Chemical Corporation	4	September 9, 2013

(a) if such Debt Securities are Senior Debt Securities, the Senior Indenture, or a supplemental indenture thereto, has been duly executed and delivered by the Company, the Subsidiary Guarantors and the trustee thereunder;

(b) if such Debt Securities are Subordinated Debt Securities, an indenture substantially in the form of the Subordinated Indenture will have been duly executed and delivered by the Company, the Subsidiary Guarantors and the trustee thereunder;

(c) the Board will have taken all necessary corporate action to designate and establish the terms of such series of Debt Securities in accordance with the terms of the Indenture under which such Debt Securities will be issued, and such Debt Securities will not include any provision that is unenforceable;

(d) the Indenture under which such Debt Securities will be issued will have become qualified under the Trust Indenture Act of 1939, as amended; and

(e) Debt Securities complying with the terms of the Indenture under which such Debt Securities will be issued will have been duly executed, authenticated, issued and delivered in accordance with the provisions of such Indenture.

On the basis of the foregoing, and subject to the assumptions, limitations and qualifications hereinafter set forth, we are of the opinion that:

1. The shares of Common Stock and Preferred Stock that may be issued by the Company included in the Securities will, when issued, have been duly authorized by all necessary corporate actions on the part of the Company and validly issued and will be fully paid and nonassessable. With respect to the shares of Common Stock that may be sold by the Selling Stockholder, such shares of Common Stock are validly issued, fully paid and nonassessable.

2. The Debt Securities and any Subsidiary Guarantees included in the Securities will, when issued, constitute legal, valid and binding obligations of the Company and the Subsidiary Guarantors, respectively, enforceable against the Company and the Subsidiary Guarantors, respectively, in accordance with their respective terms, except as the enforceability thereof is subject to (i) any applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer or conveyance or other laws relating to or affecting creditors’ rights generally and (ii) general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

3. The Warrants included in the Securities will, when issued, have been duly authorized by all necessary corporate actions on the part of the Company and validly issued and constitute legal, valid and binding obligations of the Company, enforceable

Westlake Chemical Corporation	5	September 9, 2013

against the Company in accordance with their terms, except as the enforceability thereof is subject to (i) any applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent transfer or conveyance or other laws relating to or affecting creditors’ rights generally and (ii) general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

The opinions set forth above are limited in all respects to matters of the laws of the State of New York, the General Corporation Law of the State of Delaware, the Delaware Limited Liability Company Act, the Delaware Revised Uniform Limited Partnership Act and applicable federal law. We hereby consent to the filing of this opinion with the Commission as Exhibit 5.1 to the Registration Statement. We also consent to the reference to our Firm under the heading “Legal Opinions” in the prospectus forming a part of the Registration Statement. In giving such consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission thereunder.

Very truly yours,

/s/ Baker Botts L.L.P.

SCHEDULE I

POTENTIAL SUBSIDIARY GUARANTORS

Name	Jurisdiction of Incorporation or Organization
Geismar Holdings, Inc.	Delaware
GVGP, Inc.	Delaware
North American Pipe Corporation	Delaware
North American Specialty Products LLC	Delaware
Westech Building Products, Inc.	Delaware
Westlake Chemical Investments, Inc.	Delaware
Westlake Development Corporation	Delaware
Westlake Ethylene Pipeline Corporation	Delaware
Westlake Geismar Power Company LLC	Delaware
Westlake Longview Corporation	Delaware
Westlake Management Services, Inc.	Delaware
Westlake NG I Corporation	Delaware
Westlake NG IV Corporation	Delaware
Westlake NG V Corporation	Delaware
Westlake Olefins Corporation	Delaware
Westlake Petrochemicals LLC	Delaware
Westlake Pipeline Investments LLC	Delaware
Westlake Polymers LLC	Delaware
Westlake PVC Corporation	Delaware
Westlake Resources Corporation	Delaware
Westlake Styrene LLC	Delaware
Westlake Supply and Trading Company	Delaware
Westlake Vinyl Corporation	Delaware
Westlake Vinyls Company LP	Delaware
Westlake Vinyls, Inc.	Delaware
WPT LLC	Delaware

EX-12.1

Exhibit 12.1

WESTLAKE CHEMICAL CORPORATION

STATEMENT SETTING FORTH DETAIL FOR COMPUTATION OF

RATIO OF EARNINGS TO FIXED CHARGES

(thousands of dollars)

	For the six months ended June 30, 2013			For the years ended December 31,
				2012			2011			2010			2009			2008
Earnings
Income (Loss) before Income Taxes	$	421,082		$	585,169		$	401,432		$	342,960		$	78,753		$	(58,022	)
Fixed Charges		22,745			52,269			53,298			42,051			36,541			38,109
Amortization of Capitalized Interest		—			—			—			—			—			—
Equity Investee Distributions		2,482			4,449			2,463			—			—			—
Capitalized Interest		(10,392	)		(7,706	)		(693	)		(22	)		(123	)		(3,198	)
Equity Investment (Income) Loss		(1,113	)		(1,444	)		(2,890	)		(2,212	)		(3,818	)		(621	)
Total Earnings Available for Fixed Charges	$	434,804		$	632,737		$	453,610		$	382,777		$	111,353		$	(23,732	)
Fixed Charges
Interest Expense	$	11,624		$	43,049		$	50,922		$	39,875		$	34,957		$	33,957
Capitalized Interest		10,392			7,706			693			22			123			3,198
Amortization of Debt Issue Costs		729			1,514			1,683			2,154			1,461			954
Portion of Rentals		0			0			0			0			0			0
Total Fixed Charges	$	22,745		$	52,269		$	53,298		$	42,051		$	36,541		$	38,109
Ratio of Earnings to Fixed Charges		19.1			12.1			8.5			9.1			3.0			—	(1)

(1) Earnings for 2008 were insufficient to cover fixed charges by $61.8 million.

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 22, 2013 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in Westlake Chemical Corporation’s Annual Report on Form 10-K for the year ended December 31, 2012. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Houston, Texas

September 6, 2013

EX-24.1

Exhibit 24.1

POWERS OF ATTORNEY

August 23, 2013

Each person whose signature appears below appoints Albert Chao, M. Steven Bender and Stephen Wallace, and each of them severally, as his or her true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead in his or her capacity as a director or officer or both, as the case may be, to sign a Registration Statement on Form S-3 and any and all amendments to the Registration Statement and all documents or instruments necessary to comply with the Securities Act of 1933, as amended, and to file the same with the Securities and Exchange Commission, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of each such director or officer, or both, as the case may be, each and every act whatsoever that is necessary, appropriate or advisable in connection with any or all of the above-described matters and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

Signature	Title
/s/ Albert Chao Albert Chao	President, Chief Executive Officer and Director (Principal Executive Officer)
/s/ M. Steven Bender M. Steven Bender	Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)
/s/ George J. Mangieri George J. Mangieri	Vice President, Chief Accounting Officer (Principal Accounting Officer)
/s/ James Chao James Chao	Chairman of the Board of Directors
/s/ Robert T. Blakely Robert T. Blakely	Director
/s/ Michael J. Graff Michael J. Graff	Director
/s/ Dorothy C. Jenkins Dorothy C. Jenkins	Director
/s/ Max L. Lukens Max L. Lukens	Director
/s/ R. Bruce Northcutt R. Bruce Northcutt	Director
/s/ H. John Riley, Jr. H. John Riley, Jr.	Director

EX-24.2

Exhibit 24.2

Power of Attorney

August 23, 2013

Each person whose signature appears below appoints Albert Chao, M. Steven Bender and Stephen Wallace, and each of them severally, as his or her true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead in his or her capacity as a director or officer or both, as the case may be, of the respective registrant for which he is an officer or director, to sign a Registration Statement on Form S-3 and any and all amendments to the Registration Statement and all documents or instruments necessary to comply with the Securities Act of 1933, as amended, and to file the same with the Securities and Exchange Commission, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of each such director or officer, or both, as the case may be, each and every act whatsoever that is necessary, appropriate or advisable in connection with any or all of the above-described matters and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

Signature
	/s/ Robert F. Buesinger
	Robert F. Buesinger

EX-25.1

Exhibit 25.1

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY

UNDER THE TRUST INDENTURE ACT OF 1939

OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

¨ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2)

THE BANK OF NEW YORK MELLON

TRUST COMPANY, N.A.

(Exact name of trustee as specified in its charter)

	95-3571558
(Jurisdiction of incorporation if not a U.S. national bank)	(I.R.S. employer identification no.)
400 South Hope Street Suite 400 Los Angeles, California	90071
(Address of principal executive offices)	(Zip code)

WESTLAKE CHEMICAL CORPORATION

(Exact name of obligor as specified in its charter)

Delaware	76-0346924
(State or other jurisdiction of incorporation or organization)	(I.R.S. employer identification no.)

Geismar Holdings, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 33-1036002 (I.R.S. employer identification no.)

GVGP, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 71-0921650 (I.R.S. employer identification no.)

North American Pipe Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0370735 (I.R.S. employer identification no.)

North American Specialty Products LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 46-2429042 (I.R.S. employer identification no.)

Westech Building Products, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0498816 (I.R.S. employer identification no.)

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Westlake Chemical Investments, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0664309 (I.R.S. employer identification no.)

Westlake Development Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0666307 (I.R.S. employer identification no.)

Westlake Ethylene Pipeline Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 61-1513966 (I.R.S. employer identification no.)

Westlake Geismar Power Company LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 35-2330798 (I.R.S. employer identification no.)

Westlake Longview Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 61-1496835 (I.R.S. employer identification no.)

- 3 -

Westlake Management Services, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0321065 (I.R.S. employer identification no.)

Westlake NG I Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 30-0343980 (I.R.S. employer identification no.)

Westlake NG IV Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 35-2330799 (I.R.S. employer identification no.)

Westlake NG V Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 35-2330801 (I.R.S. employer identification no.)

Westlake Olefins Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 52-1629821 (I.R.S. employer identification no.)

- 4 -

Westlake Petrochemicals LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0553330 (I.R.S. employer identification no.)

Westlake Pipeline Investments LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 27-3400646 (I.R.S. employer identification no.)

Westlake Polymers LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0144230 (I.R.S. employer identification no.)

Westlake PVC Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0346192 (I.R.S. employer identification no.)

Westlake Resources Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0321064 (I.R.S. employer identification no.)

- 5 -

Westlake Styrene LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0294926 (I.R.S. employer identification no.)

Westlake Supply and Trading Company

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0377613 (I.R.S. employer identification no.)

Westlake Vinyl Corporation

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0414632 (I.R.S. employer identification no.)

Westlake Vinyls Company LP

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 06-1641487 (I.R.S. employer identification no.)

Westlake Vinyls, Inc.

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization) 76-0542667 (I.R.S. employer identification no.)

- 6 -

WPT LLC

(Exact name of obligor as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	76-0469048 (I.R.S. employer identification no.)
2801 Post Oak Boulevard, Suite 600 Houston, Texas (Address of principal executive offices)	77056 (Zip code)

Senior Debt Securities

(Title of the indenture securities)

- 7 -

1. General information. Furnish the following information as to the trustee:

(a) Name and address of each examining or supervising authority to which it is subject.

Name	Address
Comptroller of the Currency United States Department of the Treasury	Washington, DC 20219
Federal Reserve Bank	San Francisco, CA 94105
Federal Deposit Insurance Corporation	Washington, DC 20429

(b) Whether it is authorized to exercise corporate trust powers.

Yes.

2. Affiliations with Obligor.

If the obligor is an affiliate of the trustee, describe each such affiliation.

None.

16. List of Exhibits.

Exhibits identified in parentheses below, on file with the Commission, are incorporated herein by reference as an exhibit hereto, pursuant to Rule 7a-29 under the Trust Indenture Act of 1939 (the “Act”) and 17 C.F.R. 229.10(d).

1. A copy of the articles of association of The Bank of New York Mellon Trust Company, N.A., formerly known as The Bank of New York Trust Company, N.A. (Exhibit 1 to Form T-1 filed with Registration Statement No. 333-121948 and Exhibit 1 to Form T-1 filed with Registration Statement No. 333-152875).

2. A copy of certificate of authority of the trustee to commence business (Exhibit 2 to Form T-1 filed with Registration Statement No. 333-121948).

3. A copy of the authorization of the trustee to exercise corporate trust powers (Exhibit 3 to Form T-1 filed with Registration Statement No. 333-152875).

- 8 -

4. A copy of the existing by-laws of the trustee (Exhibit 4 to Form T-1 filed with Registration Statement No. 333-162713).

6. The consent of the trustee required by Section 321(b) of the Act (Exhibit 6 to Form T-1 filed with Registration Statement No. 333-152875).

7. A copy of the latest report of condition of the Trustee published pursuant to law or to the requirements of its supervising or examining authority.

- 9 -

SIGNATURE

Pursuant to the requirements of the Act, the Trustee, The Bank of New York Mellon Trust Company, N.A., a banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Houston, and State of Texas, on the 9th day of September, 2013.

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
By:	/s/ Rafael Martinez
Name:	Rafael Martinez
Title:	Vice President

- 10 -

EXHIBIT 7

Consolidated Report of Condition of

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.

of 400 South Hope Street, Suite 400, Los Angeles, CA 90071

At the close of business June 30, 2013, published in accordance with Federal regulatory authority instructions.

	Dollar amounts in thousands
ASSETS
Cash and balances due from depository institutions:
Noninterest-bearing balances and currency and coin		3,555
Interest-bearing balances		243
Securities:
Held-to-maturity securities		0
Available-for-sale securities		706,791
Federal funds sold and securities purchased under agreements to resell:
Federal funds sold		80,200
Securities purchased under agreements to resell		0
Loans and lease financing receivables:
Loans and leases held for sale		0
Loans and leases, net of unearned income		0
LESS: Allowance for loan and lease losses		0
Loans and leases, net of unearned income and allowance		0
Trading assets		0
Premises and fixed assets (including capitalized leases)		4,961
Other real estate owned		0
Investments in unconsolidated subsidiaries and associated companies		0
Direct and indirect investments in real estate ventures		0
Intangible assets:
Goodwill		856,313
Other intangible assets		144,885
Other assets		144,427
Total assets	$	1,941,375

1

LIABILITIES
Deposits:
In domestic offices	541
Noninterest-bearing	541
Interest-bearing	0
Not applicable
Federal funds purchased and securities sold under agreements to repurchase:
Federal funds purchased	0
Securities sold under agreements to repurchase	0
Trading liabilities	0
Other borrowed money:
(includes mortgage indebtedness and obligations under capitalized leases)	0
Not applicable
Not applicable
Subordinated notes and debentures	0
Other liabilities	249,025
Total liabilities	249,566
Not applicable
EQUITY CAPITAL
Perpetual preferred stock and related surplus	0
Common stock	1,000
Surplus (exclude all surplus related to preferred stock)	1,121,667
Not available
Retained earnings	566,137
Accumulated other comprehensive income	3,005
Other equity capital components	0
Not available
Total bank equity capital	1,691,809
Noncontrolling (minority) interests in consolidated subsidiaries	0
Total equity capital	1,691,809
Total liabilities and equity capital	1,941,375

I, Cherisse Waligura, CFO of the above-named bank do hereby declare that the Reports of Condition and Income (including the supporting schedules) for this report date have been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and are true to the best of my knowledge and belief.

Cherisse Waligura ) CFO

We, the undersigned directors (trustees), attest to the correctness of the Report of Condition (including the supporting schedules) for this report date and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true and correct.

Troy Kilpatrick, President	)
Frank P. Sulzberger, Director	)	Directors (Trustees)
William D. Lindelof, Director	)

2