The ocean environment is one of the most corrosive environments. SYNPO Research Institute, a. s., Pardubice, Department of Evaluation and Testing, has assessed the expected lifetime of the CREPEX® coating system in conditions of outdoor exposure and in the attached certificates confirmed the high durability of commonly available topcoats applied on CREPEX® coating, in the environment of corrosion aggressiveness C3 and C4 for 15 years and more. Using special paints designed for the shipping industry can significantly extend the period of effective protection.