Permatex Ultra Blue. Developed to meet today’s technology changes. Sensor-safe, low odor, noncorrosive. Outstanding oil resistance and joint movement values. 8 times more flexible than cork/composite gaskets; 3 times more oil-resistant than conventional silicones. Temperature range -75 deg. F. to 500 deg. F. intermittent; resists auto and shop fluids and vibration. Suggested applications : Valve covers, oil pans, timing covers, transmission pans, differential covers. 3.35 oz. tube. Carded.