Record quarterly net income of $25.1 million, an increase of 68% compared to second quarter 2020 Declared quarterly distribution of $0.4714 per unit; 28th consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported record net income attributable to the Partnership in the second quarter of 2021 of $25.1 million, or $0.71 per limited partner unit, an increase of $10.2 million compared to second quarter 2020 net income attributable to the Partnership of $14.9 million. The increase in net income was a result of higher production, higher earnings on third-party sales as well as a buyer deficiency fee. The buyer deficiency fee of $8.7 million is a result of lower planned production in 2021 attributable to the impacts of the winter storm which occurred in the first quarter and an outage at Westlake Chemical OpCo LP ("OpCo") Petro 1 facility, which occurred on June 25, 2021. Cash flows from operating activities in the second quarter of 2021

Record quarterly net sales of $2.9 billion Record quarterly net income of $522 million, excluding one-time tax benefits in a prior quarter Record quarterly EBITDA of $932 million Announced pending acquisitions of Boral's North American building products businesses and of LASCO Fittings, Inc., which are expected to close in the second half of 2021 Westlake Chemical Corporation (NYSE: WLK) (the "Company" or "Westlake") today reported record net income, excluding one-time tax benefits, attributable to Westlake for the three months ended June 30, 2021 of $522 million, or $4.04 per diluted share, on record net sales of $2,859 million. Net income in the second quarter of 2021 increased by $507 million from second quarter 2020 net income of $15 million, or $0.11 per share, on net sales of $1,709 million. Income from operations for the second quarter of 2021 was a quarterly record of $720 million, and increased by $684 million from income from operations of $36 million for the second quarter

Westlake Chemical Corporation (NYSE: WLK), today announced plans for one of its subsidiaries to acquire the parent company of Dimex LLC, from Grey Mountain Partners, a private equity firm. Based in Marietta, Ohio, Dimex produces a variety of consumer products made from post-industrial-recycled (PIR) polyvinyl chloride (PVC), polyethylene (PE) and thermoplastic elastomer (TPE) materials, and has annualized sales of approximately $100 million. These consumer products include landscape edging; industrial, home and office matting; marine dock edging; and masonry joint controls. The proposed transaction is subject to customary closing conditions, including the expiration or termination of the applicable waiting period under the U.S. Hart-Scott-Rodino Antitrust Improvements Act of 1976, and is expected to close during the second half of 2021. “Westlake’s pending acquisition of Dimex underscores the company’s longstanding commitment to stewardship of the environment and recycling, and to

$0.4714 cents per unit distribution declared payable on August 26, 2021 The Board of Directors of Westlake Chemical Partners GP LLC, the general partner of Westlake Chemical Partners LP (the "Partnership") (NYSE:WLKP), has declared a distribution by the Partnership of $0.4714 per unit. This is the 28th consecutive quarterly distribution announced by the Partnership since its initial public offering. The distribution will be payable on August 26, 2021, to unit holders of record on August 12, 2021. This release is intended to be a qualified notice under Treasury Regulation Section 1.1446-4(b). Brokers and nominees should treat one hundred percent (100.0%) of the Partnership’s distributions to non-U.S. investors as being attributable to income that is effectively connected with a United States trade or business. Accordingly, the Partnership’s distributions to non-U.S. investors are subject to federal income tax withholding at the highest applicable effective tax rate. About Westlake

Westlake Chemical Corporation (NYSE: WLK) will release its second quarter earnings for 2021 prior to the market opening on Tuesday, August 3, 2021. 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 (855) 760-8160, or (704) 288-0624 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 4594733. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/ri2i4625 and the earnings release can be obtained via the company’s Web page at https://investors.westlake.com/news/default.aspx . A replay of the conference call will be available beginning two hours after its conclusion for seven days. To hear a replay, dial (855) 859-2056 or (404) 537-3406 for international callers. The replay passcode is 4594733. About Westlake: Westlake is a global manufacturer and supplier of

Westlake Chemical Partners (NYSE: WLKP) will release its second quarter earnings for 2021 prior to the market opening on Tuesday, August 3, 2021. The company will host a conference call at 1:00 p.m. Eastern Time (12:00 p.m. Central Time) on the same day to discuss the earnings release. To access the conference call, dial (855) 765-5686, or (234) 386-2848 for international callers, approximately 10 minutes prior to the scheduled start time and reference passcode 3216579. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/go9q47ya and the earnings release can be obtained via the company's Web page at, https://investors.wlkpartners.com/corporate-profile/default.aspx . A replay of the conference call will be available beginning two hours after its conclusion for seven days. To hear a replay, dial (855) 859-2056 or (404) 537-3406 for international callers. The replay passcode is 3216579. About Westlake Chemical Partners: Westlake Chemical Partners

July 06, 2021 07:00 AM Eastern Daylight Time North American Pipe Corporation (NAPCO), a subsidiary of Westlake Chemical Corporation (NYSE: WLK), today announced that it will acquire LASCO Fittings, Inc., a Brownsville, Tennessee-based, leading designer, engineer and manufacturer of injected-molded PVC fittings from Aalberts, NV. “We are pleased to announce this acquisition,” said Andre Battistin, vice president, NAPCO Pipe & Fittings. “By adding LASCO Fittings to our product mix, NAPCO will expand into additional markets, particularly as LASCO specializes in half-inch to four-inch fittings and serves the plumbing, pool and spa, industrial, irrigation and retail markets in the United States. LASCO’s product mix is very complementary to our existing range of pipe and fittings products primarily with diameters of four or more inches and will bring additional fittings products to NAPCO’s offerings. We look forward to welcoming LASCO’s approximately 560 employees to the Westlake family of

Westlake Chemical Corporation will acquire Boral Ltd.’s North American building products businesses for $2.15 billion Acquisition will nearly double Westlake’s building products business by adding leading brands in the premium roofing; siding, trim and shutters; decorative stone; and windows business in North America Additional product lines will broaden Westlake’s footprint into the fast-growing housing markets in North America Westlake Chemical Corporation (NYSE: WLK) today announced that it has entered into a definitive agreement with Boral Industries Inc., a wholly owned subsidiary of Boral Limited (ASX: BLD), under which Westlake will acquire Boral’s North American building products businesses in roofing; siding, trim and shutters; decorative stone; and windows for $2.15 billion in an all-cash transaction. The proposed transaction has been unanimously approved by the boards of directors of both companies and is expected to close in the second half of 2021, subject to the receipt