Permatex Red Ultra High Temp RTV Silicone Red High-Temp RTV from Permatex performs in environments up to 650F (of intermittent exposure). When it comes to temperature, it's the heaviest hitter in the Permatex arsenal. The sensor-safe formula meets or exceeds OEM specifications and smokes most conventional silicones when the mercury climbs. Ideal for high-temperature applications such as exhaust manifolds, headers, turbochargers and slip-fit exhaust parts. Features: Red RTV silicone liquid gasket for ultra high temperature applications Temperature range up to 650F (343C) (intermittent exposure) Designed to withstand extreme heat cycling Multi-purpose sensor-safe, low-odor, non-corrosive Tested to OEM specifications and outperforms conventional silicones Will not contaminate oxygen sensors or corrode other electronic engine components Superior adhesion to oily surfaces with long term durability Eliminates the need for pre-formed, pre-cut, paper, rubber or cork gaskets Use on exhaust manifolds, headers, turbochargers and slip-fit exhaust parts