Polyurethane (PU) coating is a versatile protective layer applied to surfaces to enhance durability, performance, and aesthetics. This coating is composed of polyurethane resins, which are formed through the reaction of isocyanates with polyols. PU coatings offer a range of benefits, including excellent adhesion to various substrates such as metal, wood, concrete, and plastic, making them suitable for diverse applications including automotive, construction, furniture, and marine industries. PU coatings provide resistance to abrasion, chemicals, corrosion, and UV radiation, effectively prolonging the lifespan of coated surfaces and reducing maintenance costs. Additionally, PU coatings can be formulated to achieve specific properties such as flexibility, hardness, or elasticity, allowing for customization based on the intended application. With their versatility and performance characteristics, PU coatings are widely utilized to protect and enhance the appearance of surfaces in numerous industrial and commercial settings.