An increased demand for new and improved coating systems, for both environmental & health & safety and performance reasons, have appeared during the recent decades. Currently, there is new interest in preparation of thin UV curable urethane acrylate (UA) composite coatings with short-term properties 1) . Different additives (nitrocellulose, cellulose acetate butyrate, sucrose benzoate, silica) were chosen and their influence on composite characteristics (elasticity, toughness, scratch resistance, polymerization, surface gloss, viscosity, solubility and stability) was evaluated 2) . The results showed that the cellulose based additives provide the possibility of rapid loss of adhesion of these composites after performing its function. Silica has great effect on the interaction between linear and hyperbranched urethane acrylates, which further has crucial influence on the stability of uncured pigmented mixture samples.