I noticed that rodent repellent gap-filling spray foam is now available... How long the effect lasts I don’t know.
Older houses can be really hard to totally keep sealed up... Young mice can get in amazingly small cracks, gaps, etc.
“”””I noticed that rodent repellent gap-filling spray foam is now available...””””
That sounds very interesting for those who need it and that filler foam is easy to use, sort of fun.