The JC/T 2041-2020 "Polyurethane Grouting Materials" standard was released in 2020. It mainly stipulates the terms and definitions, classification and marking, general requirements, technical requirements, test methods, inspection rules and signs, Encasement, transportation and storage of polyurethane grouting materials. The standard is applicable to polyurethane grouting materials used in projects such as water leakage treatment of concrete structures, foundation reinforcement and curtain anti-seepage in the fields of water conservancy and hydropower, construction, transportation, etc. The standard details the physical and chemical performance requirements of the product, including viscosity, percent solids, water resistance, heat resistance, weathering resistance and other indicators.