Whether you are directing water flow down a custom pond waterfall or crafting an intricate background for an indoor terrarium, SuperFish Scaping Foam provides the ultimate structural solution. The expanding black polyurethane foam is specifically formulated for aquatic and humid environments. Because it dries exceptionally dark, the scaping foam easily hides among natural stone, wood, and shadows, avoiding the unsightly yellowing common with standard DIY foams. Its high-tack formula ensures a watertight, permanent bond with a wide range of substrates, making it an indispensable tool for professional aquascapers and garden pond builders alike. Powerful Adhesion & Application Universal Bonding: Engineered to stick effectively to practically anything in your garden or tank, including natural stone, concrete, polyester, plastics, metals, and wood. Easy Application: Read safety instructions first. For the best results, ensure your surface is clean, grease-free, and lightly pre-moistened. Shake the can vigorously at least 20 times, attach the applicator, and spray upside down. Because the foam expands as it cures, you only need to fill joints to roughly 60% capacity.