TECH Off-Road (TOR) repairs have specially designed plies that dissipate stress and provide maximum flexibility and strength. Advanced rubber compounding throughout the repair construction resists over cure and flex fatigue when the tire is returned to service. These repair units are produced on a special cloth backing material which provides optimum bonding surface texture. For best results, use with TECH Temvulc Black Cement and Vul-Gum cushion gum. Heat Cure option also available.