HOUSTON, July 20 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) will release its 2005 second quarter earnings prior to the market opening on Wednesday, August 3, 2005. The company will host a conference call at 11:00 a.m. Eastern Time (10:00 a.m. Central Time) on the same day to discuss the earnings release.

To access the conference call, dial (800) 260-8140, or (617) 614-3672 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 31164236.

The conference call will also be available via webcast at http://phx.corporate-ir.net/phoenix.zhtml?p=irol- eventDetails&c=180248&eventID=1104902 and the earnings release can be obtained via the company's Web page at, http://www.westlakechemical.com/investors.html .

This call will be available for replay beginning an hour after the call has ended, and may be accessed until 11:59 AM Eastern Time on August 10th. The replay can be accessed by calling the following numbers: Domestic callers should dial 1-888-286-8010 and international callers may access the replay at 617-801-6888. The access code at both numbers is 98735767.

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, styrene, vinyl intermediates, PVC and PVC pipe, windows and fence. For more information, visit the company's Web site at http://www.westlakechemical.com .

SOURCE Westlake Chemical Corporation
07/20/2005
CONTACT: investors, Ruth Dreessen, rdreessen@westlakechemical.com , or
media, David Hansen, dhansen@westlakechemical.com , both of Westlake Chemical
Corporation, +1-713-960-9111
/Web site: http://www.westlakechemical.com
http://www.westlakechemical.com/investors.html
(WLK)
CO: Westlake Chemical Corporation