The Finish Line Multi Seal Sealant 1L is a great tire sealent that creates a Kevlar reinforced Fiberlink seal. When a puncture happens, fibers rush into the wound and instantly stop air loss. As the tire flexes while it is ridden, the FiberLink™ mesh tightens and reinforces itself, creating a confidence-inspiring seal that will last ride after ride Finish Line Multi Seal Sealant 1L Features Utilizing Dupont™ Kevlar® fibers, FiberLink™ seals are extremely robust once they plug a hole Latex free, will not dry out inside the tire once installed Will last the entire usable life of the tire No refreshing required; no gradual weight gain CO2 compatible and unaffected by cold temperatures Naturally non-toxic and hypoallergenic Water soluble and cleans up easily with a wet rag