Masters who have been engaged in paint construction for 15 years, sum up their experience and skills!

Coating construction is a technical job, and there are many common problems in construction.

Can exterior wall coatings be used for interior walls?

The performance requirements of exterior wall coatings are higher than those of interior walls, and exterior wall coatings can be used for interior walls

Why can't interior wall coatings be used on exterior walls?

Water-based interior wall coatings are composed of water, emulsion, pigments and fillers, and additives.

Why are there requirements for wall humidity and wall maintenance period before painting?

The wall is wet.

There should be a curing period of at least 28 days after the cement wall is formed and the mortar is finished, so that the cement is completely solidified, the dimensions are stable, and the wall alkali seeps out and cleans it before painting

Why do we need surface treatment, and what are the surface treatment methods?

No matter how high-quality the paint is, if there is not enough and proper surface treatment beforehand, the resulting paint surface will not be perfect in terms of performance and benefits

The method of surface treatment: high-pressure water washing, grinding, temperature control, requires the maintenance of the substrate, off, pickling, degreasing solvent, sawing, sandblasting, repair and the like

Can water-based interior wall paint with high viscosity be sprayed directly?

High-viscosity water-based interior wall coatings can be directly sprayed with airless spray without dilution or a small amount of dilution, and the effect is better

How to choose painting tools? What problems should be paid attention to when using the new line pen and the new hard brush?

According to the size, nature and paint material of the surface to be painted, different bristles and brushes are selected

When using a new hard-bristle brush, before applying paint, place the hard-bristle brush on No.
1 sandpaper and sand the head of the bristles back and forth to make the bristles smooth and polished, and then dip a small amount of paint on the old surface.
Brush back and forth several times to make the floating bristles fall off to ensure that the bristles will not fall off easily when brushing
.

When using the new pen, in order to reduce lint, you should use your fingers to move it back and forth to make the unadhered wool fall out, and then soak the pen with hot water to soak it, flatten the pen tip, and wrap it in paper.
Let it dry
.

Why is it best to apply more than twice when applying water-based interior wall paint?

The main purpose of applying the water-based interior wall paint twice is to achieve its proper hiding power and coating surface performance
.
Because the hiding power of the paint and the surface performance of the paint have a certain relationship with the thickness of the paint surface, in order to achieve the best decoration and protection effect, it is best to apply the water-based interior wall paint twice
.
The premise is to carry out construction in accordance with the substrate treatment and dilution rate required by the instructions
.

How long does it take for the water-based interior wall paint to be repainted a second time after it has been painted?

The interval between two times of water-based interior wall paint should be determined according to the specific construction conditions
.
The main thing is to apply it a second time after the first time is completely dry
.
The slower surface drying of some paints will extend the recoating time
.

Can applying a thick one layer achieve the same effect as applying two thin layers?

Water-based interior wall paint is generally required to be applied twice (under normal dilution).
Too thick coating will cause cracks on the surface of the coating, and the appearance will not be leveled
.
Although the condition of the thicker paint surface is considered in the formulation design, it does not mean that the water-based interior wall paint can be applied multiple times when it is over-diluted, because the over-dilution of the water-based interior wall paint will cause the surface of the paint to chalk
.

How long does it take to paint after the putty is approved?

There are many putties suitable for building walls, mainly water-based putty and nitro putty.
If it is water-based putty, it should be painted after 24 hours.
If it is nitro putty, it should be painted after 5 hours.
The specific basis is mainly to wait.
Paint the paint after the putty is dry, otherwise the paint surface will bubbling and peeling
.

How to deal with base materials such as gypsum board and asbestos cement board?

Gypsum board and asbestos-cement board should be fully dried before painting.
Because they have a certain alkalinity, it is recommended to coat the top coat with a sealing primer on the first layer
.

Is there any effect if the primer is not applied when applying water-based interior wall paint on the old wall? How to deal with the wall?

If the old wall is relatively strong and the alkalinity of the wall is not serious, you can directly paint the surface after sweeping the wall
.
If the surface of the paint is loose and the surface is not flat after shoveling, you need to re-apply putty and use a primer to ensure the quality of the top coat
.