Polyurethane coatings are protective layers made from a type of polymer that offers durability and resistance to wear. They are commonly used in various applications, including furniture, automotive finishes, and industrial equipment, due to their ability to withstand harsh conditions and chemicals. These coatings can be applied in liquid form and cure to form a hard, glossy surface. These coatings come in different types, such as water-based and solvent-based, each with its own advantages. Water-based polyurethane is often preferred for indoor use because it has lower levels of volatile organic compounds (VOCs), making it more environmentally friendly and safer for indoor air quality.