Challenge SMART Tubeless Tire Sealant

You've invested in high-performance tires for racing and training - protect and preserve them with a matching high-performance tire sealant. Challenge's SMART sealant seals up to 6mm cuts on-the-fly. Sealant works on all tubeless tires, including handmade tubeless and vulcanized tires  Challenge designed their SMART sealant to work across all varieties of tubeless tires - including their new handmade tubeless (HTLR) versions, plus traditional vulcanized rubber tubeless models from other manufacturers. Non-allergenic sealant with no ammonia The SMART sealant formula is non-allergenic, and contains no ammonia, so it doesn't damage tires or rims, even with extended use. Remains liquid inside tires for up to 6 months, can easily be topped off by adding more SMART sealant right through the valve. In the event you need to make an emergency repair using CO2, the SMART sealant doesn't coagulate as other brands do.