In the modern world the need for products, made from renewable resources, is growing. Liquefied wood (LW) is a rather new, renewable raw material, which could also be used in the production of polyurethane coatings. Poplar wood was liquefied in a solvolytic reagent diethylene glycol (DEG) in the mass ratio of 1:5, between wood and the reagent, respectively. To catalyse the reaction (95 min, 150 °C - 180 °C) a 3 % of H2SO4 was added, based on the amount of DEG. The product, from which we have removed the major part of the unreacted DEG, was then diluted with distilled water in the 1:3 ratio. The most adequate formulation was determined by testing various combinations of the LW-water dispersion, isocyanate hardener YCM402 and various types of catalysts, commonly used in classical PU coatings. The combination, which best suited our criteria, was then applied on the wooden surface by the air-spraying technique, and the properties of the novel coating system were compared to the properties of a commercially available water-borne 2- component PU coating. FT-IR analysis confirmed the formation of urethane structure and hydrogen bonds in the cured LW-water dispersion systems. During curing, the pendulum dumping test (SIST ISO 1522) has been performed, and after 21 days of curing the chip test for coatings, according to Peters (DIN 53 155:1971), and the pull-off test for adhesion (SIST EN ISO 4624) were performed. Gloss (SIST EN ISO 2813) and colour (calculation of colour differences by CIE-L*a*b*) were also investigated. It was stated that the resistance of the chosen system UL-IZ (1:1) is comparable to that of the commercially available coating YOM750 in the case of exposition to some cold liquids (SIST EN 12720) and dry heat (SIST EN 12722). It showed worse resistance towards water and wet heat (SIST EN 12721). However, the coating system obtained considerably better resistance when exposed to acetone, and scratching (SIST EN ISO 1518).