There are many categories of paint on the market, but many people still do not understand the specific role of the primer, but for those who decorate the construction workers are familiar with it. When the traditional home medicine is used to paint the walls, it is usually done before the primer works. It is more conducive to the subsequent painting construction after the preparation of the traditional Chinese medicine. The following is a detailed explanation of the role of the primer and how to choose the bottom. Paint related content. 
What is the role of primer?
1. Firstly, the primer has brought us a lot of effects on the decoration wall. It can well seal the most basic level of the wall, so that the base layer of the wall can be more solid. Some of the walls are more basic and produce alkali after soaking with moisture and water. The scientific name is “alkaline.†This condition causes craters to form on the surface of the paint film. In severe cases, a layer of alkali cream forms on the surface of the paint film. Ultimately the paint film is destroyed. Latex primers can act as a sealer to ease this situation, but if your house has a relatively dry wall and the floors are high, it is safer to avoid problems and avoid problems. 
2, then the role of the primer is on the one hand is to effectively enhance the adhesion effect of the topcoat, so that it can also improve the adhesion of the latex paint film and the wall surface, you can avoid wall peeling off, The primer can make up for minor cracks and improve the flatness of the wall. If your wall is flat, you can not use primer, of course, the use of the effect will be better, the price of the primer is generally relatively cheaper than the topcoat, so brushing the primer before painting can save the decoration costs .
How to choose the primer
The first thing we need to do before we are ready to buy is to learn more about the choice of primer if it is for a porous base wall with loose texture. In general, the primer is preferably a transparent primer coating with a penetrating type, and can penetrate into the pores deeply so as to achieve a good sealing effect. The base layer with a small void ratio can be selected as a film-forming white primer. Form a dense paint film to close the base layer. Bases with high base strength and high hardness should be selected as white primers with relatively hard paint film. As a sealer primer, to achieve strength matching, strongly alkaline, and easy to pan-base walls, it is advisable to select solvents with excellent sealing properties. Primer. 
Under what circumstances choose the primer
The general purpose of choosing a primer for design purposes is to attach it to the base surface of the wall so that it forms a tie layer with the top coat. Primers are usually used for painting on porous bases, for example. Concrete, especially wood. If the base layer is not waterproof, it is necessary to apply the primer. Applying the primer to the gypsum board is also a standard process in the construction industry, because the application of the primer can fill the fine gaps on the surface of the material and help prevent mold. Sometimes the surface of the substrate to be treated is very dirty and cannot be cleaned. It is also necessary to apply a primer, to apply a light-colored coating on a dark surface, or to coat the original color with a primer. 
The above information on the role of the primer and how to select the relevant content of the primer are introduced here, I hope this helps everyone. If you still don't understand where you can pay attention to more news, if you want to learn more about this news, please continue to pay attention to our website.
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