Installing NetLag
NetLag is simply wrapped around pipes or ductwork as a sound jacket. A utility knife can slice through the material. Use duct tape or belt clamps to secure the installation before walling up over the fixtures. If the material is to be exposed, get our matching FSK aluminized mylar tape for a more cosmetic finish.
Note also that this material works great to wedge up above cannister cutout locations prior to finishing off a ceiling. The installation is mechanical, anchor it with staples or brackets braced between exposed joists before the ceiling is finished.