When encountering the projects that have been constructed, it is found that the adhesion of putty on the exterior wall is poor, the following methods can be adopted to improve the adhesion of putty:

1. Watering maintenance method to improve the adhesion of putty

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.

2. Transparent penetrating primer improves the adhesion of putty

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.

3. Adding water properly to sealing primer to improve the adhesion of putty

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.

4. The adhesion of putty can be improved by avoiding direct sunlight on the wall during primer construction

Especially in summer, the temperature of the wall in direct sunlight 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 wall in direct sunlight, and add more water to the primer properly, so that the primer can fully penetrate into the base layer of putty, which will improve the adhesion of putty.

Hebei HaoShuo Chemical Co., Ltd. Hydroxypropyl methyl cellulose