Ultimate 300 cools the tyre and maintains constant tyre pressure as it seals any O-ring, porosity, breather hole and bead leaks Unlike water-based tyre sealants, Ultimate 300 is an advanced chemical formula combining glycol, latex, adhesion agents, rust inhibitors, fibers and other components Not recommended for fast movers What's in the box 1x 100L Tyre Sealant Barrel