Create stunning, natural-looking waterfalls and streams with Half Off Ponds Waterfall Gun Foam 3 pack —the professional’s choice for sealing gaps and stabilizing rocks in koi ponds, pondless waterfalls, and water features. This black expanding polyurethane foam is specially formulated to fill voids between rocks, guiding water to flow over your stones rather than underneath them for a cleaner, more dramatic visual effect.
Designed for use with a spray foam gun (sold separately), this 24oz can delivers precise application, reduced waste, and better coverage—making it ideal for both detailed rockwork and large-scale outdoor projects. Once cured, the foam forms a waterproof, UV-resistant seal that blends seamlessly with dark landscape materials and resists cracking, shrinking, or breaking down in harsh weather.
Perfect for contractors and confident DIYers alike, Half Off Ponds 3 pack of gun foam provides the strength and flexibility you need to build long-lasting water features with confidence. Whether you’re sealing around a waterfall spillway or reinforcing stacked boulders, this pond foam sealant delivers reliable results that stand the test of time.
- Direct water exactly where you want it—over rocks, not under—by sealing gaps between stones with this professional-grade black expanding foam. Ideal for koi ponds, pondless waterfalls, and backyard streams.
- This 24oz can is designed for use with a foam gun (sold separately), offering precision application and reduced waste. Great for large-scale installations and detailed rockwork in landscaping projects.
- Acts as both a waterproof foam sealant and a stabilizing adhesive for rocks and boulders. Prevents erosion and shifting while supporting the structure of your pond or waterfall feature.
- Formulated with durable polyurethane spray foam, it cures to a weather-tough, flexible seal that holds up in wet, outdoor environments. Perfect for long-term use in any climate.
- Whether you're a homeowner or a landscape pro, this 3 pack black pond foam is easy to apply and delivers consistent, high-quality results. A go-to choice for anyone building or maintaining water features.
