WTB TCS Tubeless Tire Sealant is the best choice for fast and reliable repair of punctures up to ¼" (6mm). The unique formulation cures the sealant particles in the puncture, creating a flexible and long-lasting puncture repair. Optimized for temperatures down to 15F° (-9.4°C) Sealant works best at most common driving temperatures. To ensure the sealant functions properly at extremely low temperatures, an undesirable amount of antifreeze is required. By adopting higher minimum temperatures, WTB was able to improve sealing performance by reducing the amount of antifreeze and replacing it with additional synthetic latex. Ammonia-free TCS Tubeless Tire Sealant uses the adhesive process to seal punctures instead of relying on the vaporizing effects of many ammonia-based formulas. As a result, the sealant performs better in wet, harsh conditions where other sealants have shrinkage problems due to reduced evaporation. Synthetic latex Synthetic latex keeps the sealant fresh for many months of driving. It also reduces the risk of an allergic reaction in individuals allergic to natural latex products. Complementing the TCS tubeless system, TCS Tubeless Tire Sealant is a reliable, thoroughly tested sealant that complements WTB's patented TCS system for tubeless tires, rims, wheels, valves, belts and sealant. TCS (Tubeless Compatible System) is our standardized tubeless rim/tire system designed to meet international ETRTO standards and provide unsurpassed reliability.