RDL Pond and Aqauarium Adhesive and Sealant. Ideal for fixing pond liners. Suitable for use on Butyl and EPDM pond liners, glass, stone, concrete, wood, ceramic, metal and vinyl<. Suitable for indoor and outdoor use. 290ml Cartridge (requires a skeleton gun to dispense - not included). Sets underwater - no need to empty pond prior to use. Safe for fish, aquatic life and plants. Fast curing, weather and age resitant. Provides a flexible and durable seal. Colour: Black.