Buyuneed 15mm Closed Foam Sound Deadener Material Specification: Nominal thickness 590 mil/15 mm(5/8 inch); Total coverage area of 18 sqft;Nominal sheet size 65 x 40 inches.Working temperature range: -30°F~300°F；ROLL PACKAGING;15mm closed cell foam sound deadening road noise dampening Car Heat Insulation Roll and Reduce Vibration: 590 mil insulation sound deadening foam and 1/16" thick aluminium layer; it effectively reduces 98% of heat transfer block the heat from the sun and engine from being transferred into the car,and significantly reduce engine and wind noise Stick Firmly, Easy to Install and Use : BuyUneed automotive sound deadening material is convenient in installation,you can cut exactly the amount you need and operation and only three steps can be completed: disassemble where you want to install -clean and then cut down the right size of mat for the panel -peel off backing paper and paste Wide Application Material: Car Boat Marine Sound Insulation performance; with the installation of heat shield insulation pad slow down the rate of wear and tear on pipes/circuits/paint; suitable for the boat car rv door, hood, trunk, floor, firewall and other parts of the vehicle Warm reminder: If you buy multiple quantities and receive only one package, don't worry, measure the size of the item you received first; Due to transportation reasons, the product was shipped as one continuous uncut piece When installing this product, it is not necessary to spray dirty paint or adhesive on the product Buyuneed 590 mil sound deadening offers stick firmly, easy to install and use thermal sound deadening insulation ! Adding insulation to your vehicle makes your interior quiet, comfortable, and road noise dampening. It is a car thermal insulation , sound deadening, and a protective heat insulation. It is extremely easy to handle, cut, shape, flex, and install.Suitable for the boat car RV door, hood, trunk, floor, firewall and other parts of the vehicle.