Transform your backyard water feature into a showpiece with Half Off Ponds Black Waterfall Foam Sealant Spray. Specially designed for koi ponds, pondless waterfalls, and streambed rockwork, this black expanding foam fills voids and seals gaps between rocks, preventing water from escaping under your carefully placed stones. The result? A more dramatic, natural-looking cascade and improved water flow.
Formulated with polyurethane spray foam, this professional-grade pond foam sealant cures to a durable, UV-resistant finish that blends seamlessly with dark rocks and gravel. Whether you're building a tranquil pond or maintaining an existing waterfall, this landscape foam ensures water moves where you want it—over the rocks, not beneath them.
Ideal for both homeowners and contractors, the 16oz can includes a built-in straw for precise, no-mess application. Use it as a spray foam gap filler, waterproof foam sealant, or rock glue to stabilize and enhance any outdoor water feature. Trusted by professionals and DIYers alike, Half Off Ponds delivers long-lasting results that elevate the beauty and performance of your pond. Available in single, 3-pack, 6-pack, and 12-pack options to suit any project size.
- Direct the beauty of flowing water exactly where you want it! Half Off Ponds' black expanding foam helps seal gaps between waterfall rocks and streambeds, ensuring water flows over—not under—your landscape features. Ideal for dramatic visuals in koi ponds and pondless waterfalls.
- Designed to support heavy rocks and stones, this waterproof foam sealant provides reliable adhesion and structural reinforcement. Perfect for use in pond foam applications, waterfall foam sealant work, and rock glue setups outdoors.
- Whether you're a seasoned pro or weekend warrior, this spray foam gap filler is easy to apply with the attached straw nozzle. Preferred by contractors for large pond and commercial installations, and simple enough for home use.
- Formulated with high-performance black polyurethane spray foam, it resists UV damage and remains flexible once cured. Expanding foam sealant stays strong in wet environments, making it ideal for landscape foam and outdoor water features.
- Each can dispenses easily with a built-in straw, giving you precision control on the job — available in 1, 3, 6, and 12-pack options to fit any project size, from quick repairs to full pond builds.
