The original tyre sealant and favourite brand among mountain bikers, roadies and everyone in-between. This is the best-selling sealant on the market. Just two ounces of Stans Tyre Sealant can repair punctures up to 1/4" almost instantly to keep you rolling. Stans 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 our special formula allow Stan's Tyre Sealant to be used in temperatures as cold as -20° F. First choice of riders around the world for tubeless conversion and flat prevention Seals punctures up to 1/4" (6.5mm) quickly Remains liquid inside tyres for 2-7 months for long-lasting protection Premium low-viscosity formula resists freezing to work in environments as cold as -20° F (-28° C) Natural materials, safe for the environment Can be injected through valve stems with removable cores compatible with tubes and tubular tyres. "Editors Choice - Single Track Magazine"