-> High Density Closed Cell XPE (Heavy Duty Crossed Wove Polyethylene) Foam - OIL and Waterproof -> High quality self adhesive - very strong self adhesive backing (Designed for the Automotive Industry) -> Same characteristics and excellent noise insulator properties as rubber foam -> Thickness 118 mil / 0.118 inches / 3 mm / 1/8 INCH THICK) -> Waterproof and Weatherproof -> Sounds and Heat Insulation -> The operating temperature up to 230 degrees Fahrenheit. -> Easy to install/handle/cut flexible -> Keeps the heat in during the Winter -> Keeps the heat out in the Summer -> Total coverage - 40SQFT (4FT WIDE X 10FT LONG).