Air Sealing Properties: Spray foam insulation is a two-part liquid material that air seals and insulates when sprayed onto a surface. The two liquids – usually an isocyanate and a resin – combine to give a foam that expands to fill the cavity surface.
Its ability to fill every gap and crack on a surface helps air-seal your building, including in hard-to-reach spaces. What’s more, spray foam is adherent and self-flashing, meaning it conforms to the shape of the surface resulting in airtight spaces.
Its ability to form an air barrier makes it the perfect material to prevent air leakage and insulate building parts such as attics, wall cavities, crawl spaces, basement walls, and the underside of roof decks.