GTMAT Automotive Sound Dampener 80mil Ultra Door Kit - Sound Deadening Installation Kit Includes: 12sqft Roll (4 Rolls - 12" x 36"), Instruction Sheet, Application Roller, Degreaser, GT MAT Decals Package Includes: 12sqft (4 sheets of 12"x36" - will arrive rolled into one) GTMAT Ultra 80 Mil Thick door kit and Easy to follow Installation Instruction Sheet, Application Roller, GTMAT Degreaser, GT MAT Decals Toll and Free Tech Support GTMAT Sound Deadener adheres to almost any surface instantly, and is pressure sensitive. The harder the pressure of application, the stickier the bond. Clean, grease-free surfaces provide the most durable applications. In general, the warmer the temperature, the tackier and more pliable the adhesive will be when handling and applying. Recommended application room temperature is between 50F to+120F (10C to 50C). GTMAT Sound Deadener has a superior temperature adhesion range that is much higher than the leading discount dampener or hardware store variety products. Consider this feature when using sound proofing in hot weather, or in heated automotive areas such as hood or firewall - You definitely do not want to use a mat that does not stick! GTMAT Sound Deadener is an extremely durable product. Rated at 20 years fail-free for exterior use, this product will deliver a lifetime of service in your automobile. GTMAT is water, oil, solvent, salt, rust, and heat resistant. Nominal 80 Mil Thick, 4 Mil Aluminum Shield, Sound AND Heat Insulation, Massive DB & SPL Gains, Overlap Layers for Additional Vibration Dampening, Flexible, Pliable, Malleable, Kill Unwanted Noise, Rattles, Vibrations, Impressive Bass Improvement. GTMAT Sound Deadener is a self-adhesive insulator coating that consists of a black elastomeric rubberized compound laminated to a protective layer of aluminum.