"I used this to fix and seal insulation boards to joists. I battened the joists, squirted the top of the battens with the foam and then pushed the installation board down between the joists to rest on top of the battens. It worked extremely well and there are no drafts coming through the floor at all. The only criticism I would make is the price, it is expensive and didn’t appear to go very far in the hands of a novice like me. The attached picture shows the seal that the foam made below the floor."
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Review 2 for Dow Insta Stik Expanding Foam Grab Adhesive Hand Held
"I've used Insta Stik to very successfully fit skirting boards, where old skirting and wooded battons in the wall had been removed and there were big gaps and holes in the wall.
It sticks really well, fills gaps and the skirting is fixed rocks solid now, without the need for screws or nails and having to conseal those afterwards.
Note: it doesn't expand as much as expanding PU foam, but it does expand a bit, so wedge the skirting tight to the wall with something heavy or with blocks of wood temporarily screwed to the floor while the foam sets."