GREAT STUFF Gaps and Cracks Insulating Foam Sealant GREAT STUFF Gaps and Cracks Insulating Foam Sealant with Quick Stop Straw Technology is a polyurethane-based insulating foam sealant that fills, air-seals and insulates small gaps (up to 1 in.) inside or out. What's amazing is how easy it is to use, thanks to the Quick Stop Straw Technology ...

Dow GREAT STUFF Big Gap Filler 12-oz Spray Foam Insulation at Lowe's. When you find a gap or crack that’s a real monster — up to 3 in. — GREAT STUFF™ Big Gap Filler is the stuff. 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.