Reduces Sound Transmission through Walls and Partitions Adhesive on One Side Improves Energy Efficiency by Reducing Heat Loss Closed Cell Develops Positive Seal at Only 30% Compression CRL Norseal Acoustical Sealant Tape is specially designed and formulated to effectively stop perimeter sound transmission through walls and partitions. It also helps control vibration in wall partition systems. Its low density aids in maintaining the desired STC rating of wall systems to irregular surfaces, which allows it to function as an effective seal against light and dust infiltration. V730 is compatible as a gasket to panel material and its low thermal conductivity improves energy efficiency of the structure by reducing heated or cooled air loss around wall perimeters. Color: Gray Thickness of Tape: 1/4 in (6 mm) Width of Tape: 1-1/2 in (38 mm) Feet per Roll: 50 ft (15 m) Important Note: Surfaces should be clean before applying.