Product Details: The X-tra Seal 2-1/4" x 3" Rubber Radial Tire Patch Unit are designed to provide superior protection against tire flexing forces. Each reinforcing ply is separately end-wrapped to deflect tire flexing forces in a special way. The tie-gum construction eliminates the potential for the delamination common in competitive products. This patch unit are designed to vulcanize chemically or in low-temperature systems. The gray vulcanizing gum and blue poly backing make it easy to identify the Patch Unit. With this tire patch unit, you can be sure that your tires are protected against flexing forces. FleetPride is your First Click in Heavy Duty®.