To remove wet spray foam from your hands, apply acetone or nail polish remover to a cloth and rub gently. Wash with warm water and soap, then apply a moisturizer.
Closed cell foam consists of tightly packed cells that prevent air and moisture from entering, making it more rigid and stable than open cell foam.
For stapling insulation, 20-gauge staples are recommended, though 19-gauge and 23-gauge staples can also be used.