In the bottom of my sink's cabinet, the piping comes in through generously sized holes. This area is a mouse hot-spot. They come into the cabinet through here, and so as part of my overall rodent control strategy, I am thinking about filling these holes with expanding spray foam.
Am I going to regret doing so? There are obviously other alternatives, but spray foam is quick and easy.
I've used spray foam multiple times for this task, and it has worked well for me.
It certainly is quick and easy.
Just note that spray foam expands, so you may need to spray less than you think.
Some foams give off an odor as you spray it out, so I ventilate appropriately when using them. I don't know about toxicity of the fumes.
Many spray foams are sandable, and if you use one of these foams, you can improve the appearance. Plus, as you sand down, you can see if there are any air gaps.
I would try these:
I know this doesn't answer your question but you can't put pictures in comments and it would be hard to describe with words.
