REDWOP PU-200 is a hydrophobic polyurethane based foam resin used for injection into concrete structures exhibiting water seepages. It is a single component hydrophobic resin that reacts to form a closed cell, semi-rigid, non-corrosive foam when it comes in contact with water. It provides an extended working time to ensure complete penetrability into the elements being injected without premature foaming. It is used to stop water seepages through concrete structures such as basement retaining walls, water supply facilities, tanks, cooling towers, sewage treatment plants, lift/elevator wells, slab/raft construction joints. It is injected using appropriate high pressure injection equipment from the “negative side”.