Noise generated by engine is mainly in low-frequency with great irritation, as well as heats. Underground Liner can contribute to a super barrier against all of these.
Underground Liner is composited of 5 different materials in high density. Basically, with closed and disclosed cell foam and a constrained layer of lead, noises will be block down or eliminated, preventing them get through into the interior of car, and keeping the driving environment quiet and comfortable. Moreover, the underground layer of Extended Polystyrene makes perfect performance in heat insulation.
1. Provides best solution to blocking low/mid frequency
2. Provides firm barrier to heat penetration
1. Multi-layer construction
2. Soft and flexible for installation
3. With constraint layer of lead
4. Adhesive free
Application Range: Carriage Floor, Trunk Enclosure, Fire Wall
Appearance: 5-layer gray-black acoustical foam Dimension: 812mmX1400mm
Dimension: 500mm. X 860mm .
Sound insulation measure (dB) :
Temperature range：-55°C to +105°C
Fire rating: Meets HF-1 Standard
Environmental protection standard: Meet the EU ROHS,REACH