Installation Notices Please clean the surface you want to paste. Make insulation materials and sheet metal firm fit and play best adhesive damping performance. Do not cover the chassis wiring or air holes when you installation. Appropriate use of 3 Meter adhesive tape will strengthen connections effect. Paste Aluminum Soundproof/Damping Plate you could heat with a hair dryer to make it soft then compacted by hand. If the room temperature is below 5 degrees Celsius first with sun lamp heating it until soft. Then remove the wax paper and paste it A successful installation process is best not to repeat tear paste paste effect won t be damaged. The extra insulation can be pasted in some hidden place. It is not possible that there is an effect on the hearing by only a door installation it requires completed construction Perfect for door roof floors hood firewall chassis trunk room trunk lid and so on.