Declared quarterly distribution of $0.4714 per unit; 29 th consecutive quarterly distribution Westlake Chemical Partners LP (NYSE: WLKP) (the "Partnership") today reported net income attributable to the Partnership in the third quarter of 2021 of $12.8 million, or $0.36 per limited partner unit, a decrease of $5.7 million compared to third quarter 2020 net income attributable to the Partnership of $18.5 million. The decrease in net income was a result of reduced sales to Westlake attributable to a buyer deficiency fee from Westlake Chemical Corporation (“Westlake Chemical”) that was recognized in the third quarter of 2020 in connection with Hurricanes Laura and Delta as well as the commencement of the planned turnaround of Westlake Chemical OpCo LP's ("OpCo") Petro 2 facility and associated planned production outage for the turnaround of Petro 2. Cash flows from operating activities in the third quarter of 2021 were $99.5 million, a decrease of $17.7 million compared to third quarter

Record quarterly net sales of $3.1 billion Record quarterly net income of $607 million Record quarterly EBITDA of $1.1 billion Completed acquisitions of Boral’s North American building products businesses, Dimex LLC and LASCO Fittings, Inc. Westlake Chemical Corporation (NYSE: WLK) (the "Company" or "Westlake") today reported record net income, excluding one-time tax benefits in a prior quarter, attributable to Westlake for the three months ended September 30, 2021 of $607 million, or $4.69 per diluted share, on record net sales of $3,055 million. Net income in the third quarter of 2021 increased by $550 million, or $4.24 per share, from third quarter 2020 net income of $57 million on net sales of $1,898 million despite the negative impacts of Hurricane Ida. Income from operations for the third quarter of 2021 was a quarterly record of $861 million, and increased by $782 million from income from operations of $79 million for the third quarter of 2020. The increases in net income and

$0.4714 cents per unit distribution declared payable on November 29, 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 29th consecutive quarterly distribution announced by the Partnership since its initial public offering. The distribution will be payable on November 29, 2021, to unit holders of record on November 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 Chemical Partners (NYSE: WLKP) will release its third quarter earnings for 2021 prior to the market opening on Tuesday, November 2, 2021. The company will host a conference call at 12:00 p.m. Eastern Time (11:00 a.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 8285407. The conference call will also be available via webcast at https://edge.media-server.com/mmc/p/9ssoi6jp 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 8285407. About Westlake Chemical Partners: Westlake Chemical