Question 1: Is it necessary to use primer?
1. Closed: Some walls have strong alkalinity, and efflorescence will be produced after soaking in moisture and water. This situation will cause crater-like protrusions on the surface of the paint film. Paint film damage. A latex paint primer can act as a sealer and alleviate this. However, if the walls of your house are relatively dry and the floors are high, there may be no problems if you don’t use it, but it is recommended that you use it for insurance.
2. Adhesion: The emulsion content in the primer is higher, and the adhesion is stronger. It can improve the bonding force between the latex paint film and the wall.
3. Filling and leveling: If your wall surface is not alkaline and relatively flat, you don't need to use primer, of course it is better to use it.
Question 2: What are the benefits of primer?
According to the "nail art principle", after using the primer, the wall surface can be made smoother, and it is easier to apply the paint in the later stage, and it is easier to spread. That is to say, the amount of topcoat can be saved, and the price of the topcoat is much cheaper than that of the primer.
1. Applying a layer of sealing primer before painting the topcoat can not only save decoration costs.
2. The good adhesion of the primer makes the wall smoother, makes it easier to paint the topcoat, and reduces the amount of topcoat used.
3. From the perspective of long-term and decorative effects, painting the primer can prevent the wall from paint disease, which is conducive to maintaining the painting effect for a longer period of time.
Question 3: What should I pay attention to when purchasing a primer?
1. It is better to use the same brand or matching paint for primer and topcoat to prevent chemical reaction between primer and topcoat.
2. When purchasing, first carefully read the type or model of the matching primer (or topcoat) indicated in the packaging instructions. If it is not used as a matching paint, it is necessary to do a compatibility test for the two.
Editor's reminder: Some decoration masters will say that you don't need to use primer to paint the wall, and you only need to apply the topcoat three times to achieve the effect. Hey, this is very deceptive, because without primer, the construction is easier and less troublesome.
Question 4: Does the wallpaper still need a primer?
First of all, if the wall is hard enough and smooth enough, you don't need to paint the primer for wallpapering. Then some students will ask, is it feasible to paint with varnish?
Varnish is okay, but the relative smell will be bigger. There is actually a special base film for wallpapering, which is now widely used in home decoration. The base film is sold in places that sell wallpaper.