Optimum Gray combines maximum rigidity and maximum torque load and vibration resistance with extreme temperature 65 to 700 deg F intermittent, expanding uses and applications Designed for max performance applications common in import and late model engines and component upgrades It is sensor safe, low odor and noncorrosive The maximum rigidity and maximum torque load feature combination joined with outstanding resistance to oils, coolant and shop fluids make Optimum Gray one of the most versatile gasket makers available