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I was wondering where to get the black foam. I have used the Black Can for 1" or greater holes, the red can for medium holes and the window/door where I don't want it to expand so much it creates a new hole (i.e. where the corrugated black board on the underbelly meets up with the frame). I have also heard that if you mix in bits of steel wool it keeps them from chewing it. I have heard people tell me the mice won't chew it and other people tell me that mice do chew it but NOT when it has steel wool mixed into it.
I have also used the foam, with a piece of metal screen in the middle on areas (like the rear cap) where it needs to have air/drainage but that has a huge hole. Some people have had squirrels get in there. I want to foam EVERYTHING (except slide outs) but I don't know if that is a good idea. If we drive through a rain I want to make sure there is drainage for the water that may get into the underbelly.
Good luck!
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