HOUSTON, Aug. 22 /PRNewswire-FirstCall/ -- The board of directors of Westlake Chemical Corporation (NYSE: WLK) declared on August 19, 2005, a dividend of 2.75 cents per share, payable on September 9, 2005, to stockholders of record on August 30, 2005. This represents an increase of 0.625 cents per share over the 2.125 cents per share that the company has previously paid.

This is the fourth 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 .

              (713) 960-9111
    Contact:  David R. Hansen - Media Relations
              Ruth I. Dreessen - Investor Relations


SOURCE  Westlake Chemical Corporation
    -0-                             08/22/2005
    /CONTACT:  David R. Hansen, Media Relations, or Ruth I. Dreessen, Investor
Relations, both of Westlake Chemical Corporation, +1-713-960-9111/
    /Web site:  http://www.westlakechemical.com /
    (WLK)

CO:  Westlake Chemical Corporation
ST:  Texas
IN:  CHM
SU:  DIV

AW-CD
-- DAM013 --
5592 08/22/2005 06:00 EDT http://www.prnewswire.com