During the cold days I noticed a little draft coming from the light switch next to my house door. Removing the switch revealed that the tunnel for the cables was widened to fit the cables for the electric strike control right next to it. The hole measures about 1/2" in diameter.
Is there a preferred way of closing this? By default I would either use the silicone caulk I have still around or get some expanding foam. As I am no electrician I do not know how accessible one should keep those wires. (Silicone caulk would be easier to remove as foam as far as my experience goes.)
Here's a picture
Best Answer
Sealing around wires and cables is usually a job for Duct Seal.
I'm not sure of the availability of this outside the United States, but I imagine it or a similar product is available in most places.
Duct seal never hardens, so it can be removed, move, reshaped, and reused. It also will not react with the wire/cable in any way, which often a requirement in building and electrical codes.