DEI All-In-One Thermal & Acoustic Interior Kit - Full Size VehiclesTake the guesswork out of thermal and acoustic control with this all in one part number! Introducing a simple and cost effective, universal fit, sound deadening and thermal insulation kit. Each kit includes enough material for your application. A three step process for the best interior comfort from heat and noise. STEP 1: Apply Boom Mat vibration damping material to remove structure borne vibrations, squeaks & rattles. STEP 2: Apply Boom Mat Spray On