Silca's Ultimate Tubeless Sealant 473ML (16oz) uses a super advanced formula with recycled carbon fibres and foaming latex to seal holes up to 7.5mm, even at high road tyre pressures. Fibres are evenly dispersed within the sealant and when a puncture occurs they are carried to the hole, forming a high stiffness, high strength 'dam'. The resulting reinforced latex left over the hole reduces future punctures in the area. This sealant is highly resistant to extremes of temperature, ensuring effectiveness down to -12°C, and should be replenished every 3 - 6 months to optimise performance.