Finish Line FiberLink™ Tubeless Sealant is built with Kevlar™ to deliver faster and stronger seals. FiberLink™ represents a new standard for tubeless bicycle tire sealant. Developed with Finish Line's proprietary FiberLink™ Technology, this ground breaking pro latex formula seals quickly, ensures maximum seal integrity and delivers optimum longevity. Kevlar™ fibers work synergistically with fast-acting natural latex to seal punctures as they occur. Free-flowing latex cures rapidly to create an adhesive seal which is reinforced with interlinking Kevlar™ fibers.