kilmat 80 mil 18 sqft car sound deadening mat, butyl automotive sound deadener, audio noise insulation and dampening kilmat - light weight, only 0.47 lbs/sqft <br> - the thicker the material the more performance you get! <br> - material effectively deadens the background noise <br> - easy, hassle free installation <br> pay attention! <br> - please use the gloves for your hands protection when working with material. <br> - correct installation of material is 50 % of success in the process of soundproofing your car. carefully pre-roll a material to the surface that was priorly degreased. special embossing on the foil is made for convenience of installation so you can see the areas that are rolled properly and those one that need more thorough rolling.