Donate Now   |   Print Page   |   Contact Us
Do-It-Yourself: Sealing Gaps Around Electrical Outlets and Switches
Share |

Difficulty: Beginner

Cost: 20 cents per outlet/switch

Time: Less than 5 minutes per outlet/switch


  • minimal expanding foam spray
  • screwdriver
  • utility knife
  • foam outlet gasket
  • caulk
  • caulk gun

Safety Equipment: Gloves

Before You Start:
Switch the breaker for the outlet/switch you plan to work before starting.

Once the outlet/switch is safe to work on, remove the cover if you haven’t done so already. The outlet/switch will be located inside a small box in the wall.

  • If the gap between the box and the wall is less than ¼ inches fill it in with caulk, wipe away any excess, and allow it to dry.
  • If the gap is greater than ¼ inches use a minimally expanding foam spray to fill in the gap.

Once the expanding foam spray has dried use a utility knife to cut off any excess.

Place a foam gasket behind the outlet/switch cover and put the cover back. 

Safety Precautions: Working around electricity can be very dangerous. Switch the breaker for the outlet/switch you plan to work on before starting. It is a good idea to check the outlet with a multimeter to make sure there is no power to it, wear gloves, and have someone observing in case an electrical shock occurs.