Westlake Chemical Corporation Files Registration Statement for Initial Public Offering

Westlake Chemical Corporation Files Registration Statement for Initial Public Offering

Houston, Texas – May 24, 2004 – Westlake Chemical Corporation announced today that it has filed a registration statement with the Securities and Exchange Commission for a proposed initial public offering of its common stock. The number of shares to be offered and the price range for the offering have not yet been determined. Prior to the offering, the company plans to simplify its ownership structure and combine with its parent companies. The company plans to use the proceeds of this offering for general corporate purposes, including the repayment of debt.

Credit Suisse First Boston, J.P. Morgan Securities and Deutsche Bank Securities will act as joint book-running managers for the proposed offering.

A copy of the registration statement for these securities may be accessed and downloaded at http://www.sec.gov/. or you can access it from http://www.westlakegroup.com/.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any State in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such State.

A copy of the prospectus relating to these securities may be obtained, when available, from:

Credit Suisse First Boston LLC, Prospectus Department, One Madison Avenue, New York, NY 10010 (telephone: 212-325-2580) or

J.P. Morgan Securities Inc., Prospectus Department, One Chase Manhattan Plaza, Floor 5B, New York, NY 10081 (telephone: 212-552-5164) or

Deutsche Bank Securities Inc, c/o Prospectus Department, 1251 Avenue of the Americas, 25th Floor, New York, NY 10020 (telephone 212-474-8372).

Westlake Chemical Corporation is an international manufacturer and supplier of petrochemicals, polymers and fabricated products with headquarters in Houston, Texas. The company's range of products includes ethylene, polyethylene, styrene, vinyl intermediates, PVC and PVC pipe, windows and fence.