How Much Do You Know About Primer?

Primer is a coating that is directly applied to the surface of an object as the basis for topcoat. It can adhere firmly to the surface and increase the adhesion of the upper coating, thereby improving the decorativeness of the topcoat.

1. What is the role of primer?

Primer is a liquid that is usually off-white and has a certain viscosity. It can be applied directly to the surface of an object. It is the first layer of the paint system. It is used to improve the adhesion of the topcoat, increase the fullness of the topcoat, improve the decorativeness of the topcoat, provide alkali resistance, provide anti-corrosion functions, etc., and at the same time ensure the uniform absorption of the topcoat so that the paint system can achieve the best effect. Generally speaking, it can be divided into first-coat primer, second-coat primer, etc. according to the painting requirements.

2. What is the difference between primer and topcoat?

The primer and the topcoat have different functions: the primer is the first layer of the paint system, used to fill the paint surface, support the topcoat, provide fullness, reduce costs, and help save energy; the topcoat is the final coating of the painting, and is the last layer applied in the building wall decoration. The thickness of the paint film can be increased by increasing the number of coating layers of the topcoat and thickening the topcoat. The thickness of the coating is mainly provided by the primer, while the topcoat mainly plays a decorative and protective role.

3. How many times should the primer be applied?

The number of coats of primer and topcoat mainly depends on the condition of the wall. If the condition of the wall is very good, it is enough to apply primer once and topcoat twice. However, if the condition of the wall is not ideal, it is necessary to paint several more times as appropriate to achieve the best wall effect.