The X-tra Seal 3-3/4" x 4" Glossy Finish Rubber Radial Tire Patch is designed to provide superior protection for your tires. This patch is constructed with tie-gum construction, which eliminates the potential for the delamination common in competitive products. Each reinforcing ply is separately end-wrapped to deflect tire flexing forces in a particular way. The patch features a gray vulcanizing gum and blue poly backing for a glossy finish. It is designed to vulcanize chemically or in low-temperature systems. FleetPride is your First Click in Heavy Duty®.