Gasket Sealers

Select a sealer based on the application and materials involved: RTV silicon for general engine and valve cover gaskets, anaerobic sealants for flange and metal-to-metal joints, and specialty formulations (e.g., high-temp or oil-resistant) where specified by the vehicle manufacturer

Many OEM gaskets are designed to be installed dry or with a manufacturer-specified sealer; check the vehicle service manual. Use a compatible sealer only where the manual recommends it to avoid chemical incompatibility or altered torque behavior

Clean mating surfaces of oil, old gasket material, and debris; dry thoroughly; apply sealer in a continuous bead as directed; assemble within the product's specified working time and allow the recommended cure time before pressurizing or starting the engine

Choose a sealer rated for the operating temperature range and chemical exposure (oil, coolant, fuel) of the application; high-temp formulations handle exhaust and engine heat, while oil- and fuel-resistant types prevent softening or breakdown

Some sealers can swell or deteriorate rubber, cork, or fiber gaskets; use a sealer labeled compatible with the gasket material and follow manufacturer guidance to prevent degradation or leaks

For occasional DIY jobs a small tube is usually sufficient; professionals may prefer larger cartridges. Prices vary by formulation and size, with many options clustered around the mid-range (the category average is about (price varies)), while budget tubes are typically under $50

Use gloves and eye protection, work in a well-ventilated area, and avoid skin contact; follow the product label for safe disposal and avoid pouring unused product down drains or into the environment