Great Stuff Black Polyurethane Foam All Purpose Insulating Sealant 12 oz. (Pack of 12)Major gaps are a thing of the past with this all purpose Insulating Foam Sealant from Great Stuff! Great Stuff multipurpose black insulating foam sealant is ready to use, minimal expansion polyurethane insulating foam sealant that fills, seals, and insulates gaps up to 3 4 inches. This insulating sealant expands to take the shape of gaps, creating a long lasting, airtight, and water resistant seal. It helps improve energy efficiency by forming an