JM's Muffl-Jac® sound barrier jacketing is a sound barrier jacketing used with both fibrous and closed-cell insulation materials as a path control form of acoustic treatment. It is made from a special high density, composite film laminated to 0.020” aluminum, using a viscoelastic film adhesive. It simultaneously absorbs, dampens, blocks, and isolates sounds, reducing noise levels radiated by piping and equipment. Standard 1 lb Muffl-Jac sound barrier jacketing is available in 0.020” aluminum with a stucco embossed finish. Rolls are 36" wide and 36' length (108 sq. ft.).