The SYNCROS Eco Tubeless Sealant Kit contains the next generation of sealant: it's latex-free, ammonium-free, and protein-free. This makes it a more environmentally friendly product that won't harm you or the planet. It seals punctures up to 6mm and sidewall leaks (air leaks from the thin sides of tires). This Tubeless System is one of the most important upgrades available for any bike. It's so essential, it's standard equipment on SCOTT Tuned and SL mountain bike models. Valve tape is included, along with valve stems and 2 bottles of sealant.