Wet Water Sticky Stuff (WWST), is not a silicon or a mastic. It is a one part, high modulus black polyether sealant, designed for its strength, adherence and elasticity in fixing leaks, tears or rips in garden pond liners. It is abrasion resistant, has high strength bonding qualities, a permanently flexible characteristic, is UV tolerant, environmentally friendly and can be used in water. It can be used for almost anything that needs a permanent, waterproof, anti shake, non-shrinking bond, seal or gasket. It will bond liner to rock or stone to help make a leakproof waterfall or stream. It will also bond steel, glass, wood, plastic to itself or most other materials. WWST is Non-hazardous, Non-flammable and is resistant to petrol, white sprit, mineral oils, dilute acids and alkalis also paraffin. WWST comes in a 290ml cartridge.