The ease of removing expanded polyurethane spray foam depends on a few factors. Smaller stains are easier to remove than large ones and dry foam is harder to remove than wet foam. However, either form of the insulating foam is fairly easy to remove from the skin. Since polyurethane is a chemical, we need to use a solvent to dissolve it.
Dec 20, 2019 · Secure the sections of foam to the back of the outer skin with glue, to keep it still in preparation for air-sealing the rigid sheets to the door frame with expanding polyurethane foam. Inject spray foam into the gaps around pieces of foam, let it harden, then use a hacksaw blade (taken out of the frame) to remove the hardened squeeze out.