Great Stuff expanding foam is the go-to insulating sealant for gaps and cracks, expanding as it cures to fill voids and form an airtight, water-resistant seal. Dispensed through a straw, it fills holes, cracks, gaps, and voids around windows, doors, pipes, vents, and wiring, sealing out drafts, moisture, insects, and the energy loss that uncovered gaps cause. The cured foam is rigid, trimmable, paintable, and sandable so the seal can be finished flush. For everyday gap-sealing and insulating around a building, it is a dependable, versatile foam.
Key Features:
- Expands to Fill the Void -- The polyurethane foam grows as it cures, filling holes, cracks, gaps, and voids, including irregular spaces that a bead of caulk cannot reach.
- Airtight, Water-Resistant Seal -- Cures to a continuous seal that stops drafts, moisture, insects, and the energy loss that uncovered gaps cause.
- Straw Dispenser for Precise Placement -- The straw feeds the foam directly into the opening, so you can reach gaps around windows, doors, pipes, vents, and wiring without a separate tool.
- Finish-Ready -- The cured foam is rigid and can be trimmed flush, sanded, and painted to match the surrounding surface.
- Insulating Value -- Fills the gap with rigid foam that adds insulation, so you can seal and insulate in a single step.
Where to Use:
- Air sealing -- Filling gaps around windows, doors, and penetrations.
- Insulating -- Sealing voids to stop drafts and energy loss.
- Pest & moisture -- Closing openings against insects and water.