Permatex 81878  Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz. Tube Most advanced, high temp RTV silicone gasket available Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets Sensor-safe, low odor, and non-corrosive with superior adhesion Temperature range -75F to 700F intermittent Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings