Winter is coming. I plan to stick soft polyethelene foam on window glass for thermal insulation. Last time I use Styrofoam glue, and it is a disaster. It is hard to remove it. It take hours with alcohol and box cuter. Is there any proper material for the job? The house is rented. In future I will have to remove it. I am looking for a glue strong enough to keep polyethelene foam and glass together, removable in future, and leave no gap. I tried gap before, if foam and glass has a gap between, moisture condenses and molds. I wonder is 3M 77 spray adhesive will do the job? It sticks like a 3M post-it. Or is there any alternative? Thank you!
Best Answer
Small dabs of clear silicone caulk. You'll have to secure the foam while the silicone cures (maybe 4 hours), but it'll hold very well and will be a breeze to remove and clean up. You could use masking tape or lean a broom against it. Start with pea-sized dabs, and leave them round until the foam presses into them. Keep them away from the window frame for easier removal.
Double-sided foam tape. This would be fast and easy, but it would leave a small gap against the glass. This just means that you'll need to seal the foam well at the edges. Rope caulk could help with that. A few squares around the perimeter should do nicely, or you could seal the entire edge.