Premium Carpet Underlay, MLV 1# and 1/4" closed cell foam, 3/8" x 4' x 30' roll, combines a layer of soundproofing barrier and a dense, sound-absorbing, and sound-blocking, closed cell foam. The Premium Carpet Underlay significantly reduces impact and airborne noise.

Install Premium Carpet Underlay under the carpet in your home, car, boat, RV, or any other vehicle to significantly reduce noise. The closed cell foam resists moisture, mold, and mildew.

Premium Carpet Underlay greatly reduces structure borne as well as airborne noise. For home applications, install the closed cell foam towards the floor. Leave no more than a 1/4" gap around the perimeter. Fill the gap with SoundAway Acoustical Caulk and tape the seams with Lead Seam Tape to create an air-tight seal.