What makes SILCA Ultimate Tubeless Sealant different from other sealants?

SILCA Ultimate Tubeless Sealant uses a proprietary blend of natural and synthetic latex combined with optimized carbon fiber strands and advanced foaming agents that carry those strands directly to a puncture. The foaming action disperses the fibers evenly while riding, and when a puncture occurs, the foam collapses at the hole and deposits the carbon fiber strands across it — sealing punctures 6mm and larger without pressure loss. The result is a sealant that seals bigger holes faster than latex-only formulas, stays active for 6+ months in normal conditions, and works down to -15°C (5°F). Ammonia free. One-step process, no activation required.

Injectable through the valve (injector sold separately — see SILCA Ultimate Sealant Injector). Note: this sealant is NOT compatible with Reserve valves and NOT compatible with the SILCA Tubeless Replenisher Injector (which is for the FiberFoam sealant only). Compatible with all tubeless-ready and UST rims and tires for road, gravel, and mountain bike. Made in the USA.