Tested for industry leading performance, Weldtite Tubeless Sealant can be depended on for reliable self-sealing time and time again. Get all the benefits of running tubeless with this environmentally friendly formula. Maintenance and topping up is incredibly easy too as the sealant does not ‘clog’ up and can be injected into valve stems once the core is removed. Integrated valve core removal tool built into the cap. Presta and schrader compatible. Hypoallergenic & ammonia free.