Permatex water pump and thermostat RTV silicone gasket is a non-corrosive, sensor-safe RTV silicone gasket material formulated specifically for water pumps and thermostat housings. This gasket maker has the highest water-glycol resistance available in an RTV silicone. With a temperature range of -65 degree Fahrenheit to 500 degree Fahrenheit intermittent, these gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Permatex always has the right gasket maker for your application.