SLIME Tire Sealant prevents and repairs flats in tubeless tires caused by puncturing objects up to 1/4" (6mm). SLIMEs non-toxic, non-flammable, non-aerosol and water soluble liquid installs into the tire by first removing the valve core and then applying through the valve stem.Or, for tubeless bike tires, SLIME installs between the rim and the tire bead. Hold the bead open with two tire levers, install, and re-inflate with a fast burst of air to seat the bead to the rim. Slime pump sold separately.