What should I do if the latex paint is cracked, peeled, or peeled?

-Solutions to construction problems of latex paint-

01/Causes and solutions for cracking?

■ Reason:

1.

2.
Cracks caused by improper construction methods are abnormal cracks.
For reasons such as the poor quality of the glue used when making the substrate, it is easy to separate the putty from the wall .
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On the other hand, if the putty is too thick, more than 5 cm, as the water in the wall evaporates in the future, the wall painted with latex paint will also crack in a large area.

■ Solution:

Shovel off the paint and base material, repaint it, and stick kraft paper or patching tape to avoid unnecessary trouble and waste.

02/How to solve the discoloration and fading?

■ Reason:

There are many reasons for the discoloration and fading of the paint surface, such as long sunshine time, water-soluble salt crystals on the surface of the wall, some walls with too high alkali value, and some improper construction.

■ Solution:

Consider solutions for different reasons.

03/Solution for peeling and peeling?

■ Reason:

The phenomenon of peeling and peeling caused by the moisture in the wall to separate the paint film from the wall surface should be resolved before construction.

■ Solution:

1.

2.
If it is a new house, the phenomenon of water evaporating from the wall is inevitable.
It is recommended to pretreat the wall with durable and waterproof elastic putty, and then paint it as usual to avoid peeling and falling off.

04/The solution to powdering?

■ Reason:

The wall is untreated or constructed under low temperature.

■ Solution:

If you thoroughly treat the wall before painting, paint the wall with a special wall putty and smooth it; then first apply a water-based or oil-based back cover primer, and then apply the topcoat twice.

05/Why are the walls blooming after applying latex paint?

1.

2.
Efflorescence and blooming: The putty used in the basic treatment process is too alkaline, which destroys the composition of the latex paint and causes blooming;

3.
Water marks and blooms: The base layer has too high water content and different degrees of dryness, resulting in blooming on the painted surface;

4.
Roller fading: use inferior rollers for construction.

06/The reason for the yellowing of the wall after applying latex paint?

Under poor ventilation conditions, the xylene component in the thinner reacts with the component in the latex paint to cause yellowing of the wall.

07/The reason for the poor flow/leveling?

■ Reason:

Inferior paint was used.

■ Solution:

Use high-quality latex paint, usually containing ingredients that can improve leveling.

08/The reason why the dry paint film cannot cover or "cover" the painted surface?

■ Reason:

1.

2.
Use inferior tools or incorrect rollers;

3.
Inappropriate tinting base paint and color paste are used;

4.
Poor liquidity and leveling;

5.
The color of the paint used is much lighter than that of the substrate, or it mainly contains organic pigments with low hiding power;

6.
The application rate of paint is higher than the specified value.

■ Solution:

1.

2.
For roller coating, use the recommended roller fluff.
Follow the coating rate recommended by the manufacturer;

3.
If you use tinting paint, choose the correct base paint.
Where organic colors with low hiding power must be used, a primer should be applied first.

09/The reason for the mildew on the wall after applying latex paint? How to tell if it is mildew?

1.
Mold on the surface: The main reason is poor ventilation and high humidity.
The organic matter on the surface of latex paint is easy to breed mildew;

2.
Mildew on the grassroots: due to improper treatment of the putty on the grassroots, organic matter remains, and construction without drying is completed, resulting in mildew on the grassroots and breeding on the surface of the latex paint.

10/The reason for the lump peeling on the wall after applying latex paint?

1.
The putty at the base level is too loose;

2.
Too thick latex paint will cause the paint film to block and peel off (mostly appearing at the corners)

11/The reason why the wall can tear after applying latex paint?

1.
The putty of the base layer is too loose and the strength and hardness are not enough, resulting in insufficient adhesion and easy to cause the paint film to tear;

2.
Excessive addition of water to the embedded putty can cause the surface of the putty to chalk, and the surface latex paint is easy to peel off;

3.
You can use 801 construction glue with 50% water to paint the wall to strengthen the wall.

12/What causes the visual color difference on the wall after applying latex paint and how to express it?

1.
The different gloss of latex paint may cause visual color difference;

2.
The degree of dryness of the wall is different, and the degree of dryness and humidity is likely to cause visual color difference;

3.
Different light intensity and surrounding colors can easily cause visual chromatic aberration;

4.
The base layer is not flat enough, which may easily cause visual aberrations.

13/How to apply latex paint on the old wall?

1.
The old wall must be cleaned up before applying latex paint.
Clean the old paint film on the wall, sand the wall with sandpaper, and clean the grease, dust and dirt on the wall;

2.
It is not allowed to insert putty on the surface of the latex paint on the old wall;

3.
How to deal with the old wall: After polishing and cleaning, paint it directly, no primer is needed; after thoroughly treating the old wall, re-construction.

14/Which method is better to brush, roll or spray latex paint?

1.
Brushing: rough hand feeling, obvious texture effect, less materials, traditional construction technology, very simple, easy to repair, slow construction progress;

2.
Roll coating: smooth hand feeling, certain texture, material saving, traditional construction technology, relatively simple, easy to repair, and the construction progress is fast;

3.
Spraying: The hand feel is very smooth, waste of materials, modern construction technology, professional construction is required, repair is difficult, and it is difficult to construct a variety of colors, and it is difficult to protect non-painted parts.
The construction progress is very fast.

15/Methods to improve the adhesion of putty 

1.
Water spray maintenance method to improve the adhesion of putty

The main component of exterior wall putty is cement, which will increase its strength when exposed to water.
Therefore, after the exterior wall putty construction is completed, the putty can be cured by rolling or spraying water to improve the adhesion of the putty.

2.
Transparent penetrating primer improves the adhesion of putty

Once you find that the adhesion of external wall putty is poor, you must not use colored alkali-resistant sealing primer.
Use transparent sealing primer.
Compared with colored primer, transparent sealing primer has better permeability, which can strengthen external wall putty and improve Putty adhesion.

3.
Properly add water to the sealing primer to improve the adhesion of the putty

During the construction of many projects, the primer is used directly after opening the barrel, which will affect the permeability of the primer; a reasonable approach is to properly dilute the primer with water so that the primer can penetrate into the putty base layer, thereby improving the exterior wall putty Adhesion.

4.
The primer construction avoids direct sunlight on the wall to improve the adhesion of putty

Especially in summer, the temperature of the wall exposed to direct sunlight is very high.
The primer will quickly form a film after rolling and cannot penetrate into the base layer of the external wall, which will cause poor adhesion.
On the contrary, avoid the wall exposed to direct sunlight.
Add more water to the primer to allow the primer to fully penetrate into the putty base layer, which will improve the adhesion of the putty.