Description
Butyl Sound Deadener is a composite material composed of a damping layer and a constraint layer.Damping layer The core is butyl rubber, a highly viscoelastic and high-density polymer material. It is a 'consumer' of energy.Constraint layerusually made of aluminum or aluminum foil, attached to the surface of butyl rubber. It compresses the damping layer below by bending, converting mechanical vibration into thermal energy.StructureThere is a strong adhesive backing on the back, which is used to firmly adhere to clean metal surfaces.
Main Features Efficient damping Butyl rubber is widely recognized as an excellent damping material with high efficiency in consuming vibration energy. Environmental protection and safety High quality products do not contain asphalt (asphalt products can flow at high temperatures, have odors, and harmful substances), and are suitable for automotive use environments. Stable performance It has excellent high and low temperature resistance, aging resistance, and waterproof performance, with a long service life. Strong adhesion The adhesive backing has strong adhesion and can tightly bond with complex surfaces, making it difficult to detach. Flame retardancy Legitimate products usually have flame retardant properties, enhancing safety. Easy to process can be cut with a knife and installed by pressing with a roller.

SPECIFICATION 
Material: Aluminum Foil + Butyl Rubber + Wax Paper
Recommended Install Temperature: -15°C ~ +60°C
Resistance Temperature Range: -40°C ~ +149°C
Waterproof & Fire Resistant: Yes
Sheet Thickness Approx: 4.2mm-4.5mm
Dimension: 50cm x 30cm

Package include:
40PCS Butyl Sound Deadener (3-in-1)

ypical installation location
Interior and exterior sheet metal of car doors: improves sound quality and reduces wind and external noise input.
Chassis (floor): reduces vibration and noise from the road surface and tires (road noise, tire noise).
Rear trunk: including floor, side walls, and above the rear wheel arches. This is a huge cavity resonance box, which can significantly reduce low-frequency resonance and tire noise after processing.
Rear fender (inner side of rear wheel arc): directly hits the tire noise propagation path.
Roof: Suppresses roof vibration caused by raindrops hitting and high-speed wind noise.
Engine hood: mainly used for heat insulation, while also suppressing some high-frequency engine noise.
Firewall: a critical location that blocks engine vibration and noise from entering the cockpit, but it is difficult to construct.

Application purpose
Car audio modification (primary application): provides a solid foundation for upgraded speakers, eliminates the noise caused by door panel resonance, and makes the mid to low frequencies clean, powerful, and dive deeper. Without good vibration damping, no matter how good the sound system is, it will not be effective.
Vehicle NVH optimization: Enhance the quietness and driving experience of the vehicle, making it feel more "solid" and advanced, and reducing fatigue during long-distance driving.
Targeted noise reduction: Addressing specific noise issues such as trunk noise, abnormal door noises, and loose chassis.
Auxiliary insulation: Especially used in engine hood and firewall areas, the aluminum foil layer can reflect some heat.
Other field extensions: Theoretically applicable to any metal surface that requires vibration and noise reduction, such as household appliance casings, audio equipment cabinets, RVs, ship cabins, etc.

APPLICATION 
-Rear decks
-Doors
-Floors
-Any part of the trunk
-Trunk
-Roof
-Quarter panels
-Hoods

Installation Notices
Please clean the surface you want to paste.
Make insulation materials and sheet metal firm fit,and play best adhesive,damping performance.
Paste soundproof or 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 would be best to wear the gloves when working.