2 Packs of 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.