The EN 1062-1-2004 standard specifies the classification method for coating and varnish film materials and coating systems used for exterior masonry buildings and concrete surfaces. The standard classifies different types of coating systems according to the function, performance and scope of application of coatings, providing technical guidance for selecting suitable coatings. The standard describes the characteristics of coatings in detail, such as water resistance, crack resistance, vapor transmission rate, etc., and classifies products according to these characteristics. Through the implementation of this standard, it can help industry personnel to understand and distinguish the performance of different Coating systems, ensure that scientific and reasonable choices are made in the external protection of buildings, and improve the durability and aesthetics of buildings.