This 5mm thin, 10kg/m2 soundproofing mat from Advanced Acoustics is designed to block and reduce airborne noise. It is as effective as lead of the same mass and acts as a thin de-coupling sound blocker. Dimensions are 1.2m by 2m by 5mm thick. One layer of this soundproofing mat provides an insulation value of 28dB. It can be glued directly to an existing stud before adding more acoustic plasterboard. For optimal results, it should be sandwiched between two layers of high-density Acoustic Plasterboard. Manufacturer: Advanced Acoustics.