Bitumen board, Heavy foil
Bitumen board is manufactured of impregnated wool felt board. It is permanently elastic, odourless and represents no health hazard. Suitable as sound deadining and additional rigidity of metal parts at plant engineering and construction, computer insulation, metal parts in cars, sound insulation booster of foams and lots more. If this bitumen board is put between two foam absorbers, the noise insulation effect is going to be intensified.