One, what are the differences between the primer and topcoat for water-based paints?
1、Different constituent materials
The components of the primer for water-based paints include resin, solvent, additives, and fillers, while the topcoat consists of resin, solvent, and additives.
2、Different functions/effects
During construction, the primer is the first layer applied, and its primary function is to create a smooth and even surface, providing support for the subsequent coat. This helps reduce costs and energy consumption during decoration. The topcoat is the final layer applied, and it plays a crucial role in showcasing the overall appearance, texture, and scratch resistance of the wall. Therefore, the quality of the topcoat directly determines the overall quality of the coating.
Two. Is it necessary to apply a primer before using water-based paints?
Water-based paints require a primer coat.
When applying water-based paint to walls without a primer or with a primer that is thinly applied and unevenly distributed, the wall may absorb the paint too quickly, making it impossible to achieve the desired coverage. After application, various problems such as discoloration, cracking, peeling, and mold growth may occur. Therefore, it is important not to skip the primer application to save money, as a properly primed surface will last longer and, in a sense, save money in the long run.