Boom Mat Undercarpet(TM) (TM) is a second layer sound deadening and insulation mat that will help you maintain a quality ride experience by preventing unwanted noise from being transferred into the vehicle interior. In addition to its sound deadening properties this two layer acoustic material provides superior insulation keeping vehicles cool in the heat of summer, and warmer in cold temperature climates. UC is made up of a top layer of flexible one pound per square foot mass loaded barrier material, and a bottom layer of high quality industrial acoustical marine grade foam. These combined materials offer the most ideal way to maintain a new car driving experience by eliminating squeaks rattles vibration and unwanted engine noise and heat. UC can be added under carpet on fire walls or anywhere in the interior of a vehicle where additional sound deadening or insulation is needed. For the ultimate experience in a quiet ride and interior comfort Boom Mat recommends using UC over Boom Mat Vibration Dampening Material. UC can be mechanically fastened or tacked in place with Boom Mat Hi-Temp Spray Adhesive ( 010490) including vertical and overhead surfaces. Maximum noise control A quiet and comfortable interior No mold or mildew issues Perfect combination of noise and vibration control Use as a 2nd layer over Boom Mat Material to barrier out road and engine noise