New premium version of the classic No even large punctures.Tube's Stan's sealant with added XL particles to seal Faster and better sealing capabilities to keep you rollingTwice the sealing crystals compared to the standard sealantSeals larger punctures to get you home or to the finish lineXL crystals and standard crystals combine to seal larger puncturesRide the widest range of conditions and temperaturesPremium low-viscosity latex coats the tires sidewalls for quicker sealingSafe for the environmentComprised of natural materialsMust be poured directly into tireWill clog all valves and injectors instantly1 US Quart, 946ml