All surfaces to be coated shall be clean and dry. The surface shall be evaluated and treated according to ISO8504 standard.

Steel: Sanding to Sa2.5 (ISO8501-1:2007). It is acceptable to polish by power tools to meet at least St2.0 (ISO8501-1:2007).

Concrete substrate coating surface treatment:

a. Concrete grass-roots floor, first of all, must confirm whether the base surface concrete below whether there is a reliable moisture-proof facilities. New concrete or cement base at least 28 days of maintenance time, and its water content should not exceed 5%, using empirical methods to assess the water content of the base.  

b. The grass-roots floor surface should be clean, solid and free of contaminants, such as mortar and paint sputtering, maintenance agents, grease, etc. For too much floating pulp, it is best to use light roughing, grinding. Oily ground, using electric angle grinder grinding.

c. The surface of the ground cracks, empty drums and other defects should be repaired and flat.  

d. No matter what method is used to treat the surface, it must eventually be clean, solid and dry on the grass-roots surface. It is particularly important that the grass-roots level must not be in a state of rising moisture.

e. Grassroots clean-up, polished with a polishing machine.