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Rail transit is the \"artery\" of China’s increasingly growing urban areas. To ensure the proper operation of rail vehicles, train depots across the country handle more than 4,000 train inspections and repairs as well as fixes for unexpected faults on a daily basis. The high volume of maintenance work places greater demands on the supporting facilities in EMU depots, such as the flatness, wear resistance, corrosion resistance, and waterproofing properties of the floors in the maintenance areas. The floor surface must withstand high-frequency, high-intensity use; it has to endure the pressure from various maintenance equipment such as flaw detection vehicles, as well as the corrosion caused by cleaning agents. Recently, the maintenance depot of the Qingdao EMU depot under the Jinan Railway Bureau has effectively addressed issues such as the poor scratch resistance of epoxy floors by adopting a new type of water-based polyurethane floor coating technology. This approach ensures the integrity and aesthetics of the floors in the EMU maintenance depot, while also extending the period between maintenance tasks. Water-based polyurethane floor coatings enhance the safety level of the working environment in maintenance warehouses, thanks to their advantages such as excellent wear resistance, strong resistance to scratches, and good anti-slip properties. The product cures quickly and allows for high construction efficiency, reducing the construction time and ensuring the normal use of the maintenance warehouse. Throughout the entire construction process, there are no solvents used, and emissions of odors and VOCs are low, resulting in a more environmentally friendly painting process. This environmentally friendly polyurethane floor solution is provided by Qingdao Marine New Materials Technology Co., Ltd. (abbreviated as Haimite). It features excellent and stable performance, an efficient installation process, a great appearance, and a long service life. This technological innovation not only supported the construction of projects related to the Belt and Road Initiative by solving the technical problem of stress cracking in epoxy floors in high-speed train maintenance facilities, but it also drove innovation in the application of this technology across various projects. The Qingdao EMU Depot of Jinan Railway Bureau gave it high praise in its user report. This Haimite eco-friendly floor product utilizes Covestro’s water-based polyurethane technology, enabling end-users including railway companies to carry out large-scale construction and renovation more easily, and achieving a solution with waterproofing, corrosion resistance, and wear resistance – the \"two protections and one resistance\" feature. Comprehensive technical advantages: The water-based polyurethane floor technology combines excellent environmental properties, outstanding mechanical strength, and attractive decorative effects. Water-based polyurethane technology features low VOC, low odor, and high environmental friendliness during application. The paint film cures quickly, which minimizes the time required for application and curing, simplifies the construction process, and improves efficiency. It also exhibits exceptional resistance to mechanical stress, dynamic stress, chemicals, and water. It can be used not only in industrial flooring applications where wear resistance, resistance to heavy loads, impact resistance, static electricity protection, and corrosion resistance are required, but also in areas such as exhibition halls, shopping malls, hospitals, and homes. Currently, “epoxy resin systems have many problems, such as cracking, discoloration, wear, and bulging.” Water-based polyurethane boasts comprehensive technical performance and has gained customer recognition. Provide customers with comprehensive, cost-effective and environmentally friendly solutions. ”