Silca Ultimate Tubeless Sealant Making tubeless better. Silca's tubeless sealant has been a rider favorite for years for its impressive sealing capability, this newly-redesigned Silca Ultimate Tubeless Sealant uses rider feedback to make the best-sealing tubeless sealant on the market even better. This sealant uses a reimagined Fiber Foam design, with shorter, isolated carbon fiber strands to minimize clumping and allow the sealant to be injected through the valve. This makes those sealant top-ups and new tire installs easier than ever, all without compromising the 6+mm puncture sealing capability of the original. The advanced foaming agent in the Ultimate Tubeless Sealant helps to quickly deliver the carbon fibers to the source of the puncture, forming an airtight seal. The new Silca Ultimate Tubeless Sealant now also lasts 6+ months, even in the driest climates, for fewer top-ups and more time spent riding. Features Redesigned Fiber Foam formula with shorter, isolated carbon fiber strands and a foaming design, quickly delivering the fiber strands to the source of the puncture for a fast, airtight seal Now compatible with sealant injectors with reduced clumping Lasts 6+ months even in the driest climates Seals punctures up to 6+mm just like the original, in a more user-friendly formula | Silca | Ultimate Tubeless Sealant 1 Liter