OEM specified, the Right Stuff seals instantly, forming a reliable long lasting rubber gasket. Sensor-safe, it resists powertrain fluids and outperforms pre-cut gaskets. Makes gasket of any size or shape. Operating range: up to 450F continuous (232C), 500F intermittent (260C). Proven leakproof in over 5 million miles of fleet testing.This cartridge produces 8 to 10, 4 cylinder valve cover gaskets. Meets OE specifications of: GM/Ford/Chrysler.