TECH’s Uni-Seal Ultra one-piece repair units provide a simple, quick, and safe method to properly repair redial and bias tires. Gray cushion gum on the cap to permanently bond the repair to the tire. Bonding layer on the rubber stem to permanently seal out moisture and contaminants. Lead wire for easy installation. Can be used in radial and bias tires. Best used with TECH’s Vulcanizing Fluid, Security Coat and Rub-O-Matic.