Westlake Chemical to Expand Chlor-Alkali, PVC and VCM Capacities at Facilities in Germany and Louisiana

2018 Capital Expenditures will lead to Expanded Capacities in 2019, 2020
and 2021

HOUSTON–(BUSINESS WIRE)–Westlake Chemical Corporation (NYSE: WLK) today announced that it will
expand capacities for the production of polyvinyl chloride (PVC) and
vinyl chloride monomer (VCM) at three of its chemical facilities. Two of
the plants are located in Germany (Burghausen, Gendorf) and one is
located in Geismar, Louisiana. The expansions in Burghausen and Geismar
are expected to be completed in 2019. The Gendorf expansions are
expected to be completed in 2020 and 2021.

The expansion projects are expected to add approximately 750 million
pounds annually of additional PVC and approximately 200 million pounds
annually of additional VCM to the company’s production. Specialty PVC
will be expanded at Burghausen and suspension PVC will be expanded at
Geismar. VCM production will be expanded at Geismar and Gendorf. In
addition, chlor-alkali production will be expanded at the Gendorf
facility, adding approximately 55 million pounds annually of chlorine
capacity and the associated 60 million pounds annually of membrane
caustic soda capacity.

“The chlor-alkali, PVC and VCM capacity expansions in Germany will be
our first since we completed the acquisition of our Vinnolit subsidiary
in 2014,” said Westlake Chemical President and CEO Albert Chao. “These
PVC and VCM expansions support our integrated vinyl products chain and
demonstrate Westlake’s commitment to provide our global customers with
additional production to meet their growing needs.”

About Westlake Chemical Corporation

Westlake Chemical Corporation is an international manufacturer and
supplier of petrochemicals, polymers and building products with
headquarters in Houston, Texas. The company's range of products
includes: ethylene, polyethylene, styrene, propylene, chlor-alkali and
derivative products, PVC suspension and specialty resins, PVC Compounds,
and PVC building products including siding, pipe, fittings and specialty
components, windows, fence, deck and film. For more information, visit
the company's Web site at www.westlake.com.

Contacts

Westlake Chemical Corp.
Media Inquiries:
Ben
Ederington, 713-960-9111
or
Investor
Inquiries:
Steve Bender, 713-960-9111