The first tubeless sealant in the world formulated by their founder Stan in 2001 and still the number one choice of riders today. Recommended for all-around use compatible with all tubeless road gravel and mountain bike tyres. The Original formula is the best choice for providing reliable puncture sealant performance over a 2-7 month period however arid conditions may require more frequent monitoring of liquid sealant levels. Anti-freezing agents allow for use in temperatures down to -20ºF. The world’s first tubeless sealant and the first choice of riders today Recommended for all-around use compatible with all tubeless road gravel and mountain bike tyres Seals punctures up to 6.5mm Compatible with valve installation using Stan’s Tubeless Sealant Injector Remains liquid inside tyres for 2-7 months for long-lasting protection I firmly believe Stan's is simply the most effective sealant available - 10/10 MBR 'You can stick as many screwdrivers into a tyre as you want and watch it seal but the proof is in the pudding in the real world where this is simply the most effective and consistent sealant I’ve used.The blend has sorted me out even in tyres that are pierced in awkward harder-to-seal places like right next to the bead or in the corner of a tread block rather than on the crown between knobs and also where changing temperatures and difficult-to-seal holes play havoc with many rival formulas. ' - MBR Magazine website August 2024.