Interior/exterior multipurpose black foam sealant is a ready-to-use, minimal expansion polyurethane insulating sealant.Seals and insulates gaps up to 3/4 In. creating a long-lasting, air-tight and water resistant seal. Adheres well to stone, rock, wood, metal, masonry, glass, and most plastics. Use on insulation board joints, stud penetrations, plumbing penetrations, foundation/sill junctions, chimney bases and eves, small gaps and cracks, air conditioning lines, refrigerant lines, gas lines, RV applications, marine applications, and more.