Hign-concerned Chemical:None Material:Rubber Foam Type:Soundproof Cotton Placement:HOOD,Car door,Tail Cover,Trunk,Chassis,Fender,Indoor Wall,Roof Origin:Mainland China CN:Guangdong Specification Shape: Square Material: Rubber Grade: A Flexural strength: strong Compressive strength: strong Form: fibrous Size: 200cmx50cm Thickness: 3mm/6mm/10mm Temperature Range: 80-90 (Nofireproof) Features: 1. This product comes with a strong adhesive, at room temperature above 0 degrees without additional heating can be directly pasted. The higher the outdoor temperature paste the more solid construction can not be removed after the paste is extremely strong! 2. Noise experts recommend doing sound insulation at the same time do not forget the door of the vibration, in the paste before the sound of cotton can be posted before a few vibration excellent effect, the general needs of the entire three-car sedan about 10 meters. 3. Special Note: If the owners such as the engine noise, you want to completely reduce the engine noise alone on the hood on this point sound insulation cotton is not as simple as the engine noise cotton recommended to do the hood and U-slot noise effects need to use aluminum foil sound insulation Cotton + aluminum plate butyl rubber shock plate (18-25 or so), the engine noise is a very complex system of sound engineering, you need to do fenders, firewall, instrument panel U-shaped slot sound insulation engineering! Package Incleded 1 x absorbing cotton