WHAT ARE PUTTY PADS?
Putty Pads are made from intumescent putty which is primarily used a firestopping product. Putty Pads are available as a 7" x 7" poly release faced pad for protection of recessed electrical boxes and as a through-penetration sealant. The pad is sized to fit a common 1-1/2" deep 4S electrical box.
HOW DO I INSTALL PUTTY PADS ON AN ELECTRICAL BOX?
Remove poly liner from one side of the putty pad
Align putty pad to the side of box partially overlapping the stud and adhere. Working to the opposite side of the box to the edges
If wall membrane is in place, pack putty into gaps between box and gypsum board slightly overlapping inner wallboard surface. If membrane is to be installed after pad installation, overlap front edge of box so that putty will be compressed around edges of box as wallboard is installed. Cut slits in pad to fit around conduits or cable.
Press pad to surface of top, bottom, and sides of box
Trim excess at corners and apply to conduit fittings connected to the box
Pack putty into the inside of conduit fittings to prevent the passage of smoke or sound.