Product Details: Ensure your semi truck is Ready for the Road Ahead™ with ultra-strong and solid silicone seals, with the Permatex ULTRA GREY® RTV Silicone Gasket Maker. To efficiently seal exhaust systems, gearboxes, and engines, this replacement device uses a liquid solution to create custom-fit silicone gaskets. Fashioned with a sophisticated system that keeps parts at their best with a resistance to water, oil , and other fluids. FleetPride is your First Click in Heavy Duty®.