SoundAway Barrier MLV 1#, 1/8" x 4' x 5', is a dense, 1 pound per square foot, (1#) flexible, soundproofing mass loaded vinyl (MLV) noise barrier designed to block and reflect sound. Install a layer of SoundAway Barrier to soundproof walls, floors, and ceiling surfaces reducing noise transmission.  Apply SoundAway Seam Tape over the seams of the mass loaded vinyl and apply Acoustical Caulk around perimeter and all gaps to create an air-tight seal.   Save over 20% on a full roll.