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yep... bitumen is for high frequency.. superlon is for low frequency... so u need to have both to have a better soundproofing.... B)wel.. of cos de thicker de better... but i like to use 6mm wan.. cos easier to work with... more flexible... :P :lol:
yep... bitumen is for high frequency.. superlon is for low frequency... so u need to have both to have a better soundproofing.... B)
wel.. of cos de thicker de better... but i like to use 6mm wan.. cos easier to work with... more flexible... :P :lol: