Permatex Sensor-Safe Blue RTV Silicone Gasket Maker makes reliable 'formed-in-place' gaskets that resist ing, shrinking and migrating, effectively replacing almost any cut gasket. With a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit intermittent, this gasket maker resists auto and shop fluids, and coats pre-cut gaskets to increase reliability without fouling oxygen sensors. Permatex gasket makers offer significant performance advantages which include outstanding oil resistance, excellent torque retention and hi-temp, sensor-safe properties. First generation 1970-1980 gasket maker. Suggested applications include valve covers, oil pans, timing covers, water pumps, thermostat housings, and transmission pans. Permatex always has the right gasket maker for your application.