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.