KM-518 one-component water-soluble polyurethane grouting material is a kind of polymer fast plugging material prepared by chemical synthesis of isocyanate and polyhydroxy polyether. When the product meets water, it will react quickly to produce a water-tight milky white gel-like elastomer, which will provide instant water stoppage to the leaking water in the building. It is the latest type of waterproof plugging. material.