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The Syncros Eco Sealant Tubeless kit contains the next generation of sealants: it is latex free, ammonium free and protein free. This results in a more environmentally friendly product that won't harm you or the planet. It seals holes up to 6 mm and seals wall bleeding (air leak from the thin side walls). This Tubeless System is one of the most important upgrades available for any bike. Itﾒs so essential that it comes standard on the Tuned and SL models of SCOTT mountain bikes.