Car Builders Mass Noise Liner is a 12mm thick, heavy weight barrier as used in high end luxury vehicles. It is the most effective sound proofing material on the market. Premium carpet underlay and removable sound deadener suitable for boots, firewalls and behind rear seats.
Note: due to the weight of our Mass Noise Liner it is not recommended for use on the underside of horizontal surfaces. For these applications you should use our light weight foam such as Acoustic Liner, Water proof carpet underlay, Under bonnet insulation or our 6mm Insul-layer.