The influence of weather conditions on the construction of exterior paint, you must know these!

The exterior wall architectural paint finish has the characteristics of low cost, convenient construction, rich colors and easy repair, and has been widely used in various buildings for many years

1.

Paint quality is the key to determining a good or bad finish

2.

The coating film of the emulsion type coating has certain air permeability and alkali resistance, and can be applied when the base layer is not dry, but the age of the concrete and mortar base layers should be more than 28 days and 7 days respectively, otherwise the base layer will be affected by the age of the base layer.

3.

The surface is not smooth, there are obvious stubble or there is a difference between the smooth surface and the pockmarked surface.

4.

If there is oil stain, rust, mold release agent and other substances on the surface of the base layer, after spraying and brushing paint, it will cause color reversion and yellowing

5.

Various coatings need to be under certain temperature conditions to form a continuous film.

6.
Consequences of misuse of putty

If the base layer has holes and uneven parts, it should be covered with suitable putty
.
When using solvent-based paint, the varnish of the paint can be added with talc or white powder to form a putty of appropriate consistency, and the varnish is used as the primer
.
When using emulsion-type coatings, putty with low strength and poor water resistance such as large white and cellulose should not be used, otherwise the coating will roll down together with the putty in large pieces.
107 glue, white latex cement or equivalent putty must be used
.

7.
Attention should be paid to adding water and color

The coating needs to have a suitable consistency during application
.
Some constructors add water at will when the consistency is large without stirring evenly, which often causes different shades of color after spraying, powder drop, and hollowing
.
Therefore, the paint must be fully stirred before use
.
If water must be added, it should be constructed according to the factory instructions, and water should not be added arbitrarily
.
Some operators blindly buy pigments on the market to add color to the paint in order to increase the color of the paint
.
Although the color meets the requirements during construction, the color is not correct and the color retention performance is poor due to the destruction of certain chemical components in the paint after privately adding color
.

8.
Improper brushing

During spraying construction, it should be sprayed evenly, and no leakage, false spray, or slurries are allowed
.
During construction, the lengths of the brushing and rolling directions should be the same
.
The spray coating should not be too thick.
For example, when spraying twice, the second time should be done after the first time is fully dry
.
The stubble of the paint must be at the division seam or the yin and yang corners, and no stubble can be left arbitrarily
.