I learned that One of the things to do to keep mice away is to seal openings of our home to the outside if they are bigger than a dime. I live in a big building. So I found a few openings in the utility closet.
1. In Pic 1,the tube has two drain pipes inside. So should I seal the gap between the wall and the tube? Or the gap between the tube and the pipe? All seem to be around the size of one dime.
2. Picture 2 is the electrical switch for the gas furnace. Is it safe to seal this area? There are quite a few pipes. Those are electrical cables?
3. Which brand expanding foam sealant?
非常感謝.