AquaForte 500ml Expanding Landscaping Pond FoamAquaForte 500ml Expanding Landscaping Pond Foam Fish Safe Sealant for Ponds & Waterfalls The AquaForte 500ml Expanding Landscaping Pond Foam is a professional grade foam sealant designed for securing rocks and filling gaps in ponds, waterfalls, and garden water features. It expands to form a strong, water resistant bond that blends seamlessly into natural surroundings. Key Features: Expands on application to fill cavities and secure rocks UV resistant