Gold Label 80ml Underwater Pond Sealant in Black bonds all materials even under water: Butyl Rubber, Vinyl, Glass, Plastic, Ceramic, Stone, Concrete and even wood - Solvent free so fine to use in ponds with fish still in place provided they do not ingest it. This 80ml tube tube is a ideal for smaller job and uses a "Squeezer key" push the sealant from the tube.