Automotive self-adhesive insulation consists of butyl. KILMAT sound deadening has a total weight of 0.68 lbs. /1 sqft (3.2 kg/1 sqm). This weight ensures maximum efficiency and sound insulation that could be possibly gained from 100 mil (2.5 mm) thickness material Now the material is 1,5 times thicker that will get you 1,5 times more effective insulation. The thicker the material the more performance you get Very sticky self-adhesive 100 mil automotive butyl and foil sound deadening. Car Sound Deadening Mat 80 Mil 36 Sqft , Butyl Automotive Sound Deadener Audio Noise Insulation And Dampening 8e6d8028 57a8 4f3c Afb4 8d245b93efaa.6af9c0bcb41d29058a27d2fb7d858d32 Sound Deadening Foam Very sticky self-adhesive 100 mil automotive butyl and foil sound deadening. It is user-friendly viable material suitable for DIY installation. DYNOSKIN is really efficient and easy-to-install. DYNOSKIN weight ensures optimum efficiency and sound insulation that could be possibly gained from 100 mil thickness material DYNOSKIN has a special indicator as to if it is installed correctly. Dynoskin 100 mil Car Sound Deadening Mat, Butyl Automotive Sound Deadener, Audio Noise Insulation and dampening 26 SqFt EXTRA 100 mil 25 sqft Car Sound Deadening Mat The special embossing on the foil must be rolled out till it is plain smooth, then you'll be 100% sure that the soundproofing is set correctly and professionally.