Stan's No Tubes Tyre Sealant is the product that started a tubeless revolution, changing the world of cycling. Today's tubeless systems rely on the lighter, more reliable, self-sealing performance of Stan's Tyre Sealant, the #1 Rated Tyre Sealant on the Market. Just 2 fl oz (59ml) of Stan's in a converted standard tyre or tubeless tyre can repair punctures up to 1/4" almost instantly to keep you rolling. Longer-lasting Stan's Tyre Sealant is formulated to stay liquid in tyres with even thin casings for up to seven months. Arid conditions require more frequent monitoring of sealant levels, but anti-freezing agents in their special formula allow Stan's Tyre Sealant to be used in temperatures as cold as -20° F. One quart will convert up to 16 tyres. It's the first choice of riders around the world for tubeless conversion and flat prevention. Key Features: Seals punctures up to 6.5mm, Remains liquid inside tyres for 2-7 months, Premium low-viscosity formula resists freezing, Natural materials, safe for the environment. Can be injected through valve stems with removable cores and is compatible with tubes and tubular tyres.