Permatex 3.5 oz. Ultra Gray Rigid High Torque RTV Silicone Gasket Maker. This sensor-safe, low-odor, non-corrosive formula provides outstanding oil resistance and joint movement tolerance. It is 8 times more flexible than cork/composite gaskets and 3 times more oil resistant than conventional silicones. Ideal for valve covers, oil pans, transmission pans, intake manifold end seals, timing covers, water pumps, and thermostat housings.