Epoxy PU grouting waterproofing is a highly effective method used to address water leakage issues in structures. This technique involves the injection of polyurethane (PU) or epoxy resins into cracks, joints, or voids in concrete or masonry surfaces. The injected material expands and hardens to form a watertight seal, preventing further water infiltration. Epoxy resins are known for their excellent adhesion and strength, making them ideal for structural repairs, while PU resins offer flexibility and are particularly effective in areas subject to movement. The process begins with the identification and preparation of the affected area, followed by the injection of the chosen resin under pressure to ensure thorough penetration and sealing. Once cured, the treated area becomes impervious to water, significantly enhancing the durability and lifespan of the structure. Epoxy PU grouting waterproofing is widely used in various applications, including basements, tunnels, retaining walls, and water tanks, offering a reliable solution to water leakage problems.