This product is applied before drywall, it is a light duty residential solution for blocking sound between rooms. Once mineral wool insulation is in place (purchase separately) - peel off protective film from tape at top of roll (make sure not to pull off the adhesive when removing the protective film) and press in place. It will hold in place while you add staples or self tapping screws (metal studs). This product works in commercial jobs only when metal studs are used. Quiet Wall is made from EVA Vinyl which is a safe plastic used in medical devices and food packaging. Laboratory test results show that Quiet Wall blocks airborne noise (voices and music) better than other equivalent mass loaded vinyl. Since 2010 more than 7 million square feet of EVA acoustic material has been installed in homes and businesses.