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 elasticityr it is abrasion resistant has high strength bonding qualities a permanently flexible characteristic is uv tolerant environmentally friendly and can be used in waterr 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 he