Product Description Application: Car roof floors, hood , firewall, chassis, trunk room, trunk lid and so on. Material: PE with aluminum and self-adhesive Covered with Alumium foil Thickness: 394 mil Package: 15.7 inches x 9.8 inches, 12 Packs Installation: 1, Remove the panels where you want to apply the insulation sheet. 2, Install the clips and screws brack in the original place to avoid the holes to be covered while paste the insulation sheet 3, Roller tools is a necessity to make the insulation sheet fit firmly and play best adhesive, damping performance. NOTES: 1, Please clean the surface before you apply the insulation sheet. 2, Use a roller tools to make insulation sheet firm fit and play best adhesive, damping performance. 3, Do not cover any holes or the chassis wiring when you installation. 4, Adhensive tape may be used to strengthen the connection among the pack.