The primer used in epoxy self-leveling floor coatings is usually a varnish without pigments and fillers. It has low viscosity and good permeability, and can penetrate into the interior of concrete. Its main functions are as follows: 1. to close the capillary of concrete, to prevent water in the soil under concrete from affecting the coating layer above through the capillary of concrete; 2. Reinforcing concrete, primer penetrates into the concrete interior, which can enhance the bonding strength of the permeable layer. Third, it can improve the adhesion between the coating and the concrete. Primer deeply roots the coating into the concrete interior and combines with the solid foundation of the concrete. Because of the strong alkalinity of concrete, primer is required to have better alkali resistance.
The main components of epoxy self-leveling floor paint intermediate paint are film-forming materials and aggregates to improve mechanical properties, such as quartz sand. The role of the intermediate paint is to fill the voids in the concrete base, provide enough strength for the coating system, and provide a smooth surface for the top coat. The thickness of intermediate paint is relatively large, generally between 0.5 and 3 mm, usually using scraping construction method.
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