Polyurethane varnishes and primers are widely used for the protection and finishing of various surfaces, such as wood, metal and concrete. They offer exceptional resistance to mechanical stress, weather conditions and chemicals, making them suitable for both indoor and outdoor applications. They create an ideal base for better application of subsequent coatings. They prevent the absorption of excessive moisture from the substrate (especially on wooden and concrete surfaces) and can fill micropores and irregularities, resulting in a smoother and more even surface.