TECH’s complete line of Uni-seal stems use gray cushion gum on the stem which forms a permanent bond that lasts the life of the tire as it seals out moisture and contaminants. Uni-seal stems provide a fast, permanent repair of bias and radial motorcycle, passenger, light truck, truck and tractor tires. Uni-seal stems feature a lead wire inserted into each stem which makes for easy insertion of the repair unit into the injury. Uni-seal stems must be used in conjunction with the appropriate TECH patch repair unit on the inside of the tire and with TECH vulcanizing fluid.