The cost effective 80 mil automotive butyl and foil sound deadening! You are not just buying an excellent quality product but also saving more than 20% comparing to competitors as well! Now the material is 1,5 times thicker that will get you 1,5 times more effective insulation. Noico 80 mil is 1,5 times better in comparison to sound deadening material of 50 mil. The thicker the material the more performance you get!