Great Stuff Insulation Pond & Stone Gap Filler 3 Pack
Black closed-cell polyurethane foam sealant for porous and nonporous rocks or stones. Expands to fill gaps and create an airtight, water-resistant seal for outdoor projects. Reusable Smart Dispenser seals for up to 30 days between uses
Highlights
- expands up to 1 inch
- airtight, water-resistant seal
- reusable dispenser for 30 days
Pros
- bonds to rocks and stones
- expands to fill gaps up to 1 inch
- airtight and water-resistant seal
- dispenser supports 30-day reuse
- easy, no-drip dispensing
Cons
- single color option
- foam could require surface compatibility check
- limited data on long-term durability
Best For
Features
- Bonds to porous and nonporous rocks or stones without mortar; expands up to 1"
- Creates an airtight and water-resistant seal for outdoor projects
- Reusable Smart Dispenser allows sealing projects for up to 30 days with no-drip, precise dispensing
