Slime Tubeless Tire Sealant prevents and repairs flats in tubeless tires caused by punctures up to a quarter-inch. Non-flammable, non-toxic and non-aerosol, this sealant installs easily through the valve, and for bikes, between the rim and the tire bead. Slime works repeatedly -- when a puncture occurs, the escaping air forces Slime with FibroSeal technology in the puncture wound to seal the puncture. This product is virtually mess-free, cleans up with water, and lasts for up to two years.