J-B Weld High Temperature RTV Silicone Gasket Maker - Red 3 oz.

J-B Weld's High Temperature RTV Silicone Gasket Maker is a room temperature vulcanized sealant engineered for demanding mechanical assemblies exposed to extreme heat. This red silicone formula withstands continuous temperatures up to 550 degreesF or intermittent exposure to 650 degreesF, making it ideal for engine gaskets, valve covers, oil pans and other high-heat applications. The sealant cures when exposed to moisture in the air, forming a durable, waterproof bond on most surfaces without requiring heat or special equipment. With over 40 years of proven performance, J-B Weld's silicone gasket maker delivers the reliable seal professionals and DIY enthusiasts trust for critical engine work and industrial repairs.