Why does the paint peel when applied with latex paint? How to apply latex paint

Latex paint has rich and varied colors, good environmental protection, and high cost performance, but its most prominent problem is that the wall is prone to cracking, even if the mesh is hung. What are the reasons for the cracking of latex paint walls? Why does the latex paint peel? How to reduce the possibility of cracking when applying latex paint? Let's take a look at the sharing of Encyclopedia Knowledge Network!

Contents of this article

1. What are the reasons for cracking of latex paint walls?

2. Why does the latex paint peel off?

3. How to apply latex paint

What are the reasons for cracking of latex paint walls?

1. There are cracks in the insulation layer of the house, which causes cracks to appear on the wall after latex paint is applied.

2. After the wall grooving is completed, due to improper repair, the wall shrinks and causes cracks in the wall.

3. During the plastering process, the cement ratio is incorrect, resulting in wall cracks.

4. The mixing ratio of latex paint and water is inappropriate, resulting in wall cracks.

Why does latex paint appear to peel?

1. The latex paint base layer becomes powdery and brittle due to material reasons.

2. During construction, dust or other stains adhere to the surface of the base layer, affecting the adhesion of latex paint.

3. The humidity and temperature of the environment are not suitable during construction, and latex paint is applied before the base layer is completely dry.

4. The original wall plaster layer had an inaccurate grade, which caused the wall cement plaster layer to crack and affected the latex paint.

5. Improper mixing ratio of the base putty and substandard puttying process will also lead to problems with latex paint in the later stage.

6. If the ratio of latex paint to water is not properly controlled, the latex paint will peel off during later use.

How to apply latex paint

1. Before applying latex paint, first apply putty to the base. Apply putty to a large area. Putty refers to a mixture of white cement and glue in a ratio of 10 to 4. After the base is dry, sand it once with sandpaper, and then apply putty to it. It should be noted that the proportion of this layer of putty is white cement and glue talcum powder in a ratio of 10 to 4 to 2. After the base panel is basically flat, finely grind it to ensure the smoothness of the base panel.

2. Pour the latex paint into a larger container and stir it evenly to avoid uneven color distribution. It should be noted that when the latex paint is too thick, it must be stirred into a fluid state before it can be used again. If the latex paint is too thick and cannot be stirred into a fluid state, no more than 8% of paint thinner can be added to it, but water cannot be added to avoid reducing the coating strength of the latex paint after brushing.

3. When applying latex paint, it is usually applied from left to right, from top to bottom, and from inside to outside. This is the only way to ensure the uniformity of latex paint application. It is best to keep the speed of latex paint application consistent and the force uniform, so as to ensure the uniformity of latex paint coating. It should be noted that the number of times of brushing back and forth latex paint should not be too many, so as to avoid scratches or bubbles.

4. When applying latex paint, you can put a small amount of oil on the brush and apply it quickly to avoid dripping. It should be noted that the latex paint used in the room decoration should be of the same batch number to avoid affecting the room decoration effect due to inconsistent color and consistency.