Abstract: As time goes by, some ageing phenomenon would occur in concrete structures, mainly concrete carbonization and steelbar corrosion. There are two methods for concrete anti- carbonization treatment, that is brushing rigid coat on the surface of concrete structure in good condition, otherwise, partial repair and total flexible closing protection should be adopted for carbonized concrete surface. The SK coat for carbonization prevention, introduced in this paper, is composed of bottom layer of BE14, middle layer of ES302 and surface layer of PU16. This coat is applicable in the protection for damp concrete surface, and can be used in moist environment and water fluctuation district. It is of the character such as good effect for carbonization prevention, high adhesive strength to concrete, alkali- resistant and impervious, perfect flexibility and et al. It has been successfully applied in damp concrete surface protection, and strongly recommended for use in other similar projects.