High-performance tire sealant and balancer with aramid fibers that can quickly plug punctures and prevent leaks. Formulated to hydro-dynamically balance high-speed tires, dampen road noise and vibrations that cause a rough ride. Prevents flats, bead leaks, wheel pin holes, and other slow leaks. If your tire is punctured, the centrifugal force of the rotating tire and the internal air pressure will force First Line Sealant into the hole, sealing it instantly (up to 1/2" in tubeless tires and 1/8" in tube tires). Non-flammable and non-corrosive - will not damage tire or wheel. Water washable for easy cleanup. Freeze protection to -35 degrees F.