EXPANDAFOAM is a unique one-part urethane foam which expands as it dries and solidifies. It fills cracks and holes that caulk cannot! EXPANDAFOAM sprays as a liquid, then expands and cures to a durable semi-rigid closed cell foam insulation. Each can dispenses over 200 linear feet of product when sprayed in a 3/8 inch cured bead. It forms a water impervious, weather resistant and airtight bond on masonry, wood, metal, glass, tile and most plastics. Each application dries tack free in 15-30 minutes and cures completely in 8 to 24 hours, depending on humidity. EXPANDAFOAM fills cracks and plugs holes, eliminating energy escape or the entrance of insects or rodents. It seals out Radon Gas and deadens sound when applied to sheet metal.