Half Off Ponds Black Waterfall Gun Foam — Expanding Pond Sealant, 24 oz, 12 Pack

Control where water flows by sealing gaps between stones with this professional black expanding foam from Half Off Ponds. Engineered for koi ponds, pondless waterfalls and backyard streams, each 24 oz can is formulated for use with a foam gun (sold separately) to allow precise placement and minimize waste. Supplied as a 12 pack to support large installations and multiple landscaping projects. Functions as both a waterproof foam sealant and a stabilizing adhesive for rocks and boulders, helping prevent erosion and shifting while reinforcing the structure of ponds and waterfall features. Made from durable polyurethane spray foam that cures to a weather-tough, flexible seal designed to withstand wet outdoor conditions and long-term exposure in any climate. User-friendly for homeowners and reliable for landscape professionals, this black pond foam is easy to apply and delivers consistent, high-quality results for building and maintaining water features.