Low Volitile/Hi-Temp Sil

The PERMATEX Low Volatile/High-Temp Silicone RTV sealant is a professional-grade gasket maker engineered for demanding high-temperature engine and equipment applications. This 3 oz tube delivers reliable, durable sealing where standard sealants fail, making it essential for automotive technicians, equipment maintenance specialists, and DIY enthusiasts working with engines, transmissions, and heat-exposed assemblies. The sensor-safe formulation ensures compatibility with modern oxygen sensors and catalytic converters, preventing damage to vehicle emissions systems while maintaining a secure seal.

This low-volatility silicone formulation cures to form a flexible, rubber-like gasket that withstands extreme thermal cycling and vibration stress. The RTV (Room Temperature Vulcanizing) technology allows application and assembly without oven curing, saving time on the job while the low volatile organic compound (VOC) composition reduces harmful emissions during application and curing. Once set, the sealant resists engine oil, coolant, and transmission fluid while maintaining flexibility and adhesion across temperature extremes, preventing leaks at critical assembly points where rigid gaskets may crack or shift.

Professionals and serious hobbyists rely on this sealant for oil pan gaskets, valve cover seals, timing cover applications, and exhaust manifold repairs on both modern and classic engines. The compact 3 oz tube delivers ample material for multiple seal applications, with a shelf life that ensures consistent performance across projects. Installation is straightforward: apply to clean, dry surfaces in a continuous bead, allow proper cure time per manufacturer specifications, and reassemble—no special tools or surface preparation equipment required beyond standard degreasing.