Webcast Alert: Westlake's President & CEO, Albert Chao, and Senior Vice President and CFO, Ruth Dreessen, to Address CSFB 2004 Chemical Conferences

HOUSTON, Sept. 23 /PRNewswire-FirstCall/ -- Albert Chao, President & CEO, and Ruth Dreessen, Senior Vice President and CFO, of Westlake Chemical Corporation (NYSE: WLK), will address investors at the following two events:

Investors Conference: CSFB 2004 Leveraged Finance Chemical Conference in New York, Monday, September 27, 2004 at 1:40 p.m. Eastern time. Presentation to be made by Ruth Dreessen.

Ms. Dreessen's presentation: This presentation may be accessed at http://www.westlakechemical.com/presentations/PRSEP272004.pdf shortly before the presentation begins.

Investors Conference: CSFB 2004 Chemical Conference in New York, Thursday, September 30, 2004 at 11:00 a.m. Eastern time. Presentation to be made by Albert Chao.

Access: Live audio-only webcasting (including replays) of Mr. Chao's presentation will be provided via CSFB's Web page and can be accessed at http://www.csfb.com/csfbtv/Americas/chemical2004/09_30_04/westlake_1100am/inde x.html

Mr. Chao's presentation: This presentation may be accessed at http://www.westlakechemical.com/presentations/PRSEP302004.pdf

Westlake 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, vinyl intermediates, PVC and PVC pipe, windows and fence. The Company's Web page may be accessed at http://www.westlakechemical.com .

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995: Statements in this press release regarding Westlake Chemical Corp.'s business which are not historical facts are "forward-looking statements" that involve risks and uncertainties. For a discussion of such risks and uncertainties, which could cause actual results to differ from those contained in the forward-looking statements, see "Risk Factors" in the Company's Annual Report or Form 10-K for the most recently ended fiscal year.

SOURCE Westlake Chemical Corporation
CONTACT: media, D. R. Hansen, or investors, Graham McArthur, both of Westlake Chemical Corporation, +1-713-960-9111