Westlake Chemical Elects Directors, Declares Continued Quarterly Dividend of 5.25...

Westlake Chemical Elects Directors, Declares Continued Quarterly Dividend of
5.25 Cents per Share

HOUSTON, May 18 /PRNewswire-FirstCall/ -- At their annual meeting held on
Thursday, the stockholders of Westlake Chemical Corporation (NYSE: WLK)
elected James Chao and H. John Riley, Jr., as directors, to serve until 2012.

At its meeting on Friday, the company's board of directors declared a
continued quarterly dividend of 5.25 cents per share, payable on June 11,
2009, to stockholders of record on May 28, 2009.

This is the 19th successive quarterly dividend that Westlake has declared
since completing its initial public offering in August 2004.

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

SOURCE Westlake Chemical Corporation

David R. Hansen, Media Relations, or Steve Bender, Investor Relations, both of
Westlake Chemical Corporation, +1-713-960-9111