The coating shall not be too thick.
3.
2.
The humidity in the substrate is too high, and water-soluble salt crystals cause discoloration and discoloration on the surface of the wall.
Causes: 1.
Causes: 1.
2.
2.
The dilution ratio is too high.
The film is too thick and the surface shrinks.
Poor wall surface treatment.
If there is leakage, the problem of leakage shall be solved first.
Polish the old paint surface of the object to be brushed with sandpaper.
The interval between two coats of paint brushing must be sufficient to ensure that the second coat of paint can be applied after the first coat of paint is completely dry.
The paint film brushed is too thick.
3.
Paint directly on the old paint surface that has not been polished.
Low quality or low price emulsion In order to increase the stability of the emulsion, excessive surfactants are often added, which will greatly reduce the water resistance of the emulsion itself.
When the primer is dry, gas will be generated to jack up the top coat.
Solution: for slight blistering of the paint film, polish it with sand paper after the paint film is dry, and then make up the top coat; In case of serious blistering of the paint film, the paint film must be removed and treated according to the causes of blistering after the base course is dry, and then the stone like paint can be sprayed.
Poor weather resistance of paint resin.
08 wrinkling: the film forms undulating wrinkles.
2.
4.
06 delamination (also known as undercutting) the reason for the delamination is that the primer is not completely dry when brushing, and the diluent of the surface layer swells the primer, causing the paint film to shrink and peel.
09 serious cross pollution causes: the distribution of the surface layer on the grid was not noticed during the construction process, resulting in the appearance of rolling off.
The temperature is too high during drying.
Selecting high-quality lotion requires the manufacturer to select high molecular acrylic polymer with excellent water resistance as the film-forming material to improve the water resistance of stone paint from the source..
During spraying, there is water vapor in the compressed air, which is mixed with the paint.
If the paint film has been formed, but there is still sticky ester phenomenon, it is called the cause of back adhesion: 1.
The base course surface is not clean.
For slight slow drying and tackiness, ventilation can be strengthened and the temperature can be properly increased.
The base course is wet and the paint film bubbles due to water evaporation.
5.
Then peel off the fallen paint and loose substances, fill the defective surface with durable putty, and then seal the primer for priming.
Multiple coating, each time with a thin layer.
The paint film is too thick at one time.
The inferior real stone paint is not natural colored sand, and the base material is alkaline, which infringes on pigments or resins with weak alkaline resistance.
Improper use of desiccant.
Once a long rainy day is encountered, rainwater will permeate into the paint film, resulting in the whitening of the real stone paint.
4.
Treatment methods: 1.
04 Causes of peeling and peeling: The paint film will be separated from the base course surface due to the high humidity of the base material, unclean surface treatment, incorrect brushing method or use of inferior primer.
3.
Solution: In this case, the wall shall be checked for leakage.
These substances are water-soluble or hydrophilic, and remain in the coating after the coating is formed, greatly reducing the water resistance of the coating.
There will be various problems in the construction of exterior wall paint.
Solution: Carry out an average grid division treatment, and evenly match the mortar during the plastering process of the basement.
as thickeners when manufacturing Stone paints.
Solutions: 1.
3.
Solution: in the construction process, we must follow every construction step to avoid the damage of cross pollution as far as possible.
Solution: the coating construction shall be carried out according to the specified time interval.
Reduce the dilution ratio.
01 After slow drying and re bonding paint are applied, the paint film still remains dry beyond the specified time, which is called slow drying.
03 causes of discoloration and discoloration: 1.
The top coat shall be applied after the primer is completely dry.
Causes: 1.
07 On the construction site, it is often found that the paint is hanging or dripping from the wall, forming a tear like or wavy appearance, commonly known as a tear drop.
Solution: if you see this phenomenon during construction, you can wipe or shovel off the surface with problems first, let the cement dry completely, and then apply a layer of sealing primer and select good stone paint.
The water absorption of the paint film is relatively high, and the bonding strength is correspondingly reduced.
Solution: In order to prevent this situation, avoid coating too thick and brush evenly.
The primer is not dry enough, and the top coat is painted in case of rain.
The base course surface is not completely dry.
2.
The solution to chalking: first clean the chalking, then prime it with a sealing primer with good performance, and then re spray the real stone paint with good weather resistance.
The following section will share with you the common problems and solutions in the construction process of stone like paint.
3.
Apply the second coat of paint before the previous coat of paint is dry.
2.
1.
3.
3.
The amount of lotion is too low, and the price of high-quality lotion is relatively high.
The climate is harsh.
When applying the second layer of paint, the first layer is not dry.
Solution: 1.
3.
010 Causes for a large number of uneven plastering lines: large area of cement mortar causes slow drying time, which will lead to cracking and hollowing; MT-217 bentonite is used in stone like paint, which is smooth and easy to scrape.
At the same time, we can choose auxiliary coatings with anti-aging, high temperature resistance and strong radiation resistance to fill it, which can also ensure the reduction of cross pollution.
05 After the blistering paint film dries thoroughly, the surface appears bubble spots of different sizes, which are slightly elastic when pressed by hand.
Too much water is added to the coating during painting.
The coating temperature is too low, resulting in poor film formation.
2.
Thickener excess manufacturers often add a large amount of carboxymethyl cellulose, hydroxyethyl cellulose, etc.
011 Whitening in water, poor water resistance and main reasons: some stone like paints will turn white after being washed and soaked by rain, and return to the original state after sunny weather, which is a direct manifestation of poor water resistance of stone like paints.
2.
In order to save costs, the manufacturer only adds a small proportion of lotion, which makes the paint film loose and not dense enough after drying.
4.
Improper coating material selection.
2.
Slow drying or severely tacky paint film shall be cleaned with strong solvent, and then re sprayed with 02 powder: the main reasons for powdery paint film after coating are: 1.
