Ultimate Tubeless Sealant uses FiberFoam technology to harness the power of carbon fiber to seal up to 7mm punctures without losing pressure. SILCA Ultimate Tubeless Sealant uses the power of a foaming latex formula combined with chopped carbon fibers to boost sealing power even at higher pressures. Ultimate Tubeless Sealant contains 5% by volume, 6, 9, and 12mm chopped carbon fibers which have been reclaimed from recycled bicycles, carbon wheels, racecars, and aircraft components. A unique foaming latex formula allows for the very lightweight carbon fibers to be evenly dispersed within the sealant while riding, which allows for a higher fiber content than possible with Kevlar or fiberglass. Features Effective down to 10F/ -12C. Seals up to 7.5mm holes for up to 6mo. Must be poured into tire during install. Not injector compatible (It seals holes bigger than your valve). Use Replenisher every 90-120 days for best performance. 6, 9, and 12mm recycled carbon fibers are dispersed evenly by a foaming latex to create ultra strong seals.