GREAT STUFF Big Gap Filler Insulating Foam Sealant offers the same benefits as GREAT STUFF Gaps & Cracks but fills gaps larger than 1 inch. So it"s great for creating larger weather-tight seals to stop drafts and keep critters out. Plus, like all GREAT STUFF products, it"s airtight, paintable, stainable and sand-able. It"s polyurethane-based and perfect for all sorts of materials like wood, drywall, metal, masonry, glass and most plastics.