Second Quarter 2006 Westlake Chemical Corporation Earnings Conference Call

HOUSTON, July 18 /PRNewswire-FirstCall/ -- Westlake Chemical Corporation (NYSE: WLK) will release its 2006 second quarter earnings prior to the market opening on Thursday, August 3, 2006. 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) 510-9834, or (617) 614-3669 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 77946714.

The conference call will also be available via webcast at eventDetails&c=180248&eventID=1353908 and the earnings release can be obtained via the company's Web page at .

This call will be available for replay beginning an hour after the call has ended, and may be accessed until 1:00 p.m. Eastern Time on August 10, 2006. 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 95712404.

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 .

Investor Contact
Steve Bender, 713-960-9111

Media Contact
David Hansen, 713-960-9111

Westlake Chemical Corporation

Web site: