Description: JOINSIL 688 is made of 100% silicone rubber. It is permanently flexible and does not crack or shrink. Thewater proof seal stops leaks and meanwhile, long-lasting bond is easy to apply. Applications: It can be used to manufacture new aquariums, non-toxic for use on fresh water and salt water aquarium and for shop window, unfurl cabinet, doors and windows. Color: Clear Packing: 300ml/cartridge