Westlake Corporation has announced the permanent closure of multiple chlorovinyl and styrene production facilities in Mississippi and Louisiana, citing global overcapacity and deteriorating margins. The move, part of a broader profitability push, will remove over 3 billion pounds of combined capacity and incur $415 million in pre-tax charges. Overseas buyers of PVC, VCM, chlor-alkali, and styrene should monitor supply shifts as Westlake consolidates production to seven remaining North American sites.
Plant closures and capacity impact
Westlake will cease operations at four facilities: a 1-billion-pound-per-year suspension PVC plant in Aberdeen, Mississippi; a 910-million-pound VCM plant and an 825-million-pound chlorine/910-million-pound caustic soda diaphragm chlor-alkali unit in Lake Charles, Louisiana (North and South sites); and a 570-million-pound styrene plant in Lake Charles. The closures reduce global chloro-vinyl capacity by 11% to 15%, depending on the product. Post-shutdown, Westlake's North American capacity stands at 4.9 billion pounds of suspension PVC, 6.05 billion pounds of VCM, 6.1 billion pounds of caustic soda, and 5.41 billion pounds of chlorine.
Financial and operational costs
Pre-tax shutdown costs total approximately $415 million, comprising $357 million in non-cash accelerated depreciation and asset write-offs, $25 million in employee severance, and $33 million in other plant closure expenses. The company expects these actions to deliver $175 million in annual free cash flow improvement starting in 2026. Westlake's broader profitability plan targets a total EBITDA uplift of $600 million by 2026 across three strategic pillars.
Supply-chain and customer continuity
Westlake stated it will continue supplying PVC, VCM, and chlor-alkali products from its seven remaining North American chlorovinyl facilities. The company also noted it will serve export customers from these sites, addressing challenges in the global market. The closures will result in approximately 295 job losses, with affected employees receiving severance packages.
What buyers should watch
Overseas importers and distributors of PVC, VCM, chlor-alkali, and styrene should anticipate tighter North American supply for these products, potentially supporting prices in export markets. Westlake's reduced capacity may shift sourcing dynamics, particularly for styrene and chlorovinyl derivatives. Buyers should also note the company's parallel closure of its Pernis, Netherlands, facility for liquid epoxy resin and bisphenol A, further consolidating Westlake's global footprint.
China sourcing context
While Westlake's closures are North America-focused, the underlying driver—global overcapacity in chlorovinyl and styrene—is heavily influenced by China's massive production expansions. Chinese PVC and VCM exports have pressured margins worldwide, prompting rationalization in higher-cost regions. Overseas buyers sourcing from China should monitor whether this trend accelerates further plant shutdowns in other regions, potentially tightening global supply balances.
Source: Read the original report | Published: December 16, 2025