Westlake Chemical Reelects Directors, Declares Quarterly Dividend of 2.75 Cents per Share

HOUSTON, May 15 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) held its annual stockholders meeting today at which the stockholders reelected James Chao and Dr. Gilbert R. Whitaker, Jr. as directors, to serve until 2009.

At its meeting today, the board of directors of Westlake declared a dividend of 2.75 cents per share, payable on June 9, 2006, to stockholders of record on May 26, 2006.

This is the seventh 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 http://www.westlakechemical.com .

Westlake Chemical Corporation

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

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