Half Off Ponds Black Waterfall Gun Foam — Expanding Pond Sealant, 24 oz, 6 Pack

Control water flow in your feature by sealing stone joints so water travels over rocks instead of under them with this professional-grade black expanding foam. Formulated as a polyurethane spray foam, each 24 oz can is intended for use with a foam gun (sold separately) to allow precise placement and minimize waste. Ideal for koi ponds, pondless waterfalls, and backyard streams, it works for both large-scale installations and intricate rockwork. The product functions as a waterproof foam sealant and a stabilizing adhesive for rocks and boulders, helping to prevent erosion and shifting while supporting your pond or waterfall structure. Once cured it forms a weather-tough, flexible seal built to withstand wet outdoor conditions and long-term use in any climate. Easy to apply for homeowners or landscape professionals, this 6 Pack black pond foam delivers consistent, high-quality results and is a reliable choice for building or maintaining water features.