Permatex 81422 Sensor-Safe High-Temp RTV Silicone Gasket Maker, 3 oz. Specially formulated for engines equipped with oxygen sensors Temperature range: -65F to 650F intermittent First generation 1970-1980 gasket maker Suggested Applications: valve covers, oil pans, timing covers, water pumps, thermostat housings and transmission pans Resistant to auto and shop fluids