Gorilla® Heavy Duty Expanding Foam is a multi-purpose, fast curing* expanding foam, that fills, seals and insulates. Great for a variety of applications, the straw allows expansion into gaps and cracks without excessive overflow for a neater finish – perfect for sealing out any air, moisture and even pests! Great for attics, ducts, doors, windows, skylights, crawlspaces, floors, masonry, plumbing, vents, ceilings, walls and more!  Bonds: PVC, Brick, Concrete, Insulation Materials, Plaster, Plastic, Wood, Metal and more.