The Permatex RTV Gasket Maker Gear Oil Sealant is a specially formulated sealant designed to withstand the harsh environment found in differentials and transfer cases. This sealant is sensor safe, non-toxic and non-flammable and has been tested to OEM standards to guarantee full sealing power. This 3-ounce tube is perfect for sealing small areas and is easy to apply. With its superior sealing power, it is the perfect choice for a sealing job. FleetPride is your First Click in Heavy Duty®.