Meets OEM Specifications. Permatex Ultra silicones were developed to meet today's technology changes. Sensor-safe, low odor, non-corrosive. Outstanding oil resistance and joint movement tolerance. Eight times more flexible than cork/composite gaskets; three times more oil resistant than conventional silicones. Temperature range -65F to 500F (-54C to 260C) intermittent; resists auto and shop fluids and vibration. Product Features:Meets OEM SpecificationsSensor-safe & non-corrosiveWill not contaminate oxygen sensors or corrode other electronic engine componentsSuperior adhesion to oily surfaces with long term durabilitySuperior resistance to powertrain fluids including engine oil, transmission fluid, gear lube and coolantsEliminates the need for pre-formed, pre-cut, paper, rubber or cork gasketsTemperature range -54C to 260C (-65F to 500F) intermittentApplications: Valve covers, oil pans, timing covers, transmission pans, differential covers.