TECH’s Uni-Seal Ultra one-piece repair units provide a simple, quick, and safe method to properly repair radial and bias tyres. grey cushion gum on the cap to permanently bond the repair to the tyre. Bonding layer on the rubber stem to permanently seal out moisture and contaminants. Lead wire for easy installation. Best used with TECH’s Vulcanizing Fluid, Security Coat, and Bead Sealer.