I agree, it's amazing how much draft will come through a building and out or into the receptacle cutouts.I would say draft stopping is all that is necessary and most caulks will do the job.
Roger
I agree, it's amazing how much draft will come through a building and out or into the receptacle cutouts.
If not an airtight rated box (or to close a dialated foam perforation in one), acoustic sealant from the outside of the box. from the inside of the box after the fact or remodeling, a UL rated acoustic putty (QuietPutty, PuttyPads etc.) since the caulk makes a mess of the box. Avoid spray foam in a box or where cotiguous with the box’s openings as ignition temperature of the cheap brands (GreatStuff etc.) is 120 C and not UL listed. A lot of folks just seem to use latex caulk, which while not a listed method, seems just fine.Caulk around the perimeter of the box to seal between drywall and box....what is a good way to seal the knockouts inside a plastic box to keep air from passing through ?
If not an airtight rated box (or to close a dialated foam perforation in one), acoustic sealant from the outside of the box. from the inside of the box after the fact or remodeling, a UL rated acoustic putty (QuietPutty, PuttyPads etc.) since the caulk makes a mess of the box. Avoid spray foam in a box or where cotiguous with the box’s openings as ignition temperature of the cheap brands (GreatStuff etc.) is 120 C and not UL listed. A lot of folks just seem to use latex caulk, which while not a listed method, seems just fine.