8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): March 6, 2013

WESTLAKE CHEMICAL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	001-32260	76-0346924
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

2801 Post Oak Boulevard, Suite 600 Houston, Texas	77056
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (713) 960-9111

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01. Other Events.

On March 6, 2013, Westlake Chemical Corporation announced that it had signed an agreement to acquire the assets of the Pipe and Foundations Group business of CertainTeed Corporation, a subsidiary of Compagnie de Saint-Gobain. The purchase price is $175 million in cash, including $22 million of working capital, with closing adjustments. The transaction is subject to closing conditions including regulatory review. A copy of Westlake's press release is furnished as Exhibit 99.1 to this Form 8-K.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1    Press Release of Westlake Chemical Corporation dated March 6, 2013*

* This exhibit is intended to be furnished and shall not be deemed “filed” for purposes of the Securities Exchange Act of 1934, as amended.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

			WESTLAKE CHEMICAL CORPORATION
		By:	/S/ ALBERT CHAO
			Albert Chao President and Chief Executive Officer
Date:	March 7, 2013

EXHIBIT INDEX

Exhibit No.	Description
99.1	Press Release of Westlake Chemical Corporation dated March 6, 2013*

* This exhibit is intended to be furnished and shall not be deemed “filed” for purposes of the Securities Exchange Act of 1934, as amended.

EX-99.1

EXHIBIT 99.1

Westlake Chemical Acquires CertainTeed's PVC Pipe, Fittings and Foundations Business

HOUSTON, March 6, 2013 /PRNewswire/ -- Westlake Chemical Corporation (NYSE: WLK) announced today that it has entered into a definitive agreement with CertainTeed Corporation, a subsidiary of the French public company, Compagnie de Saint-Gobain, to purchase its Pipe and Foundation Group (PFG), a leading producer of PVC pipe and fittings for municipal, water well, mining, agriculture and irrigation applications. The sale is for a purchase price of $175 million in cash, including $22 million of working capital, with closing adjustments. The transaction is expected to close in the 2nd quarter of 2013, subject to standard closing conditions, including regulatory review.

The PFG acquisition includes the PVC pipe, fittings, profiles and foundations business and associated operating facilities in Lodi, California and McPherson, Kansas with production capacity of approximately 150 million pounds per year. Westlake will also acquire technologies and intellectual properties for the production of a number of specialized products, including Certa-Lok® restrained joint pipe and Yelomine™ branded products for a variety of end market applications.

"The acquisition of CertainTeed's PFG business is an excellent strategic fit for Westlake. When completed, it will enhance our North American Pipe and building products portfolio by adding specialty product lines and supporting technology that we do not currently have. These new products, technologies, and a broader market reach will increase our ability to service our customers' needs and further differentiate the value of our vinyls integration strategy. CertainTeed is known as a well-run solutions-oriented company with talented people and we look forward to adding this workforce to our team," stated Albert Chao, Westlake's President and CEO.

Westlake Chemical Corporation (WLK)

Westlake Chemical Corporation is a manufacturer and supplier of petrochemicals, polymers and building products with headquarters in Houston, Texas. The company's range of products includes: ethylene, polyethylene, styrene, propylene, caustic, VCM, PVC resin and PVC building products including PVC pipe, windows and fence. For more information, visit the company's Web site at http://www.westlake.com.

The statements in this release relating to the proposed acquisition, as well as any other matters that are not historical facts, are forward-looking statements that are subject to risks and uncertainties. Actual results could differ materially. For more detailed information about factors that could cause actual results to differ materially, please refer to Westlake's Annual Report on Form 10-K for the year ended December 31, 2012, which was filed in February 2013.

CONTACT: Media Relations, David R. Hansen, +1-713-960-9111, or Investor Relations, Steve Bender, +1-713-960-9111