Great Stuff Pond & Stone Insulating Foam Sealant 12 oz. Black

Transform and secure stone, rock and concrete features around your yard with a durable, weather-resistant sealant. Great Stuff Pond & Stone Insulating Foam Sealant is a ready-to-use, closed-cell polyurethane foam that bonds seamlessly to both porous and nonporous surfaces—no mortar required. Its black coloration blends naturally into shaded crevices, water features and retaining walls, maintaining a clean, professional finish.

Whether you’re filling gaps around fountain basins or reinforcing landscape edging, this moisture-tolerant foam delivers superior adhesion and insulation. Simply attach the applicator straw, dispense the foam into voids and let it cure into a firm, long-lasting seal that stands up to wet environments and seasonal temperature swings.

Key Features

• Ready-to-use closed-cell polyurethane foam
• Bonds to natural stone, brick, concrete and more
• Ideal for ponds, water features, retaining walls and landscaping
• Moisture-tolerant formulation won’t degrade in damp conditions
• Blends in with dark crevices and shaded stonework