The adhesion of putty will directly affect the construction quality of coating
The poor adhesion of putty was found in many projects during construction
But the putty construction has been completed in a large area
Consideration of construction period cost and other factors
Putty can no longer be replaced
In this case, is there any way to improve the adhesion of putty?
Watering maintenance
The main component of putty for exterior wall is cement, which will increase the strength when encountering water. Therefore, after the construction of putty for exterior wall is completed, the putty can be cured by rolling or spraying water to improve the adhesion of putty.
Transparent penetrating primer
Once it is found that the external wall putty has poor adhesion, colored alkali resistant sealing primer shall not be used. Transparent sealing primer shall be used. Compared with colored primer, transparent sealing primer has better permeability, which can strengthen the external wall putty and improve the putty adhesion.
Sealing primer with proper water
During the construction of many projects, the primer is directly used after the barrel is opened, which will affect the permeability of the primer; the reasonable way is to add water to dilute the sealing primer properly, so that the primer can penetrate into the putty base, so as to improve the adhesion of the putty on the exterior wall.
Keep away from sunshine during primer construction
Especially in summer, the temperature of direct sunlight on the wall is very high, and the primer will form a film soon after roll coating, which can not penetrate into the base layer of the outer wall, resulting in poor adhesion. On the contrary, avoid the direct sunlight on the wall, add more water to the primer properly, and let the primer fully penetrate into the putty base, which will improve the putty adhesion.
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