Putty powder is not only used indoors but also outdoors, so there are exterior wall putty powder and interior wall putty powder. So what is the difference between exterior wall putty powder and interior wall putty powder? The formula of exterior wall putty powder is how is it

Introduction of exterior wall putty powder and interior wall putty powder

External wall putty powder: it is made of inorganic gelling material as the base material, combined with bonding materials and other additives. Its outstanding features are high bonding strength, water resistance, alkali resistance and good construction performance. It can be used as a leveling material on the surface of outdoor buildings once and for all. Avoid the phenomenon of cracking, foaming, pulverization and shedding.

Interior wall putty powder: it is a kind of surface filling material for pretreatment of the construction surface before paint construction. The main purpose is to fill the pores of the construction surface and correct the curve deviation of the construction surface, so as to obtain a uniform and smooth paint surface Base. Putty powder is divided into oily putty and water-based putty, which are used in the construction of paint and latex paint respectively.

The difference between exterior wall putty powder and interior wall putty powder

1. The main difference between interior wall putty and exterior wall putty is the different ingredients. The inner wall putty uses Shuangfei powder (big white powder) as the main raw material, so its water resistance and hardness are relatively poor. The exterior wall putty uses white cement as the main raw material, so its water resistance and hardness are much stronger.

2. There is not much difference in the thickness (particles) of the putty on the inner wall and the putty on the outer wall, and it is difficult to distinguish it by hand and touch.

3. There is not much difference between the interior wall putty and the exterior wall putty in terms of environmental protection, because the environmental performance of the raw materials used is basically the same.

4. The outer wall putty is mainly high in strength. It is not as good as the inner wall putty when it is scratched on the wall, and it is not easy to polish after drying.

5. The main raw material of interior wall putty is white powder. No matter how it is formed, the strength of white powder is very low after drying. It can be scratched with nails, and it will soften again after being exposed to water.

6. The strength of white cement is very high after hydration and solidification, even with a small hammer, there is no trace, and it will not hydrate or soften again after being exposed to water.

7. The difference between the putty on the inner wall and the putty on the outer wall is that the putty on the outer wall has a certain degree of water resistance and is not afraid of rain. It is an oily putty and can be used on both inner and outer walls. The interior wall putty does not have waterproof performance and cannot be used for exterior walls.

Optimization of exterior wall putty powder formula (for reference only)
1. Cement 350KG, heavy calcium 500KG, quartz sand 150KG, latex powder 8-12KG, cellulose ether 3KG, starch ether 0.5KG, wood fiber 2KG

2.425# white cement (black cement) 200-300 kg, gray calcium powder 150 kg, double fly powder 45 kg, talcum powder 100-150 kg, rubber powder 10-15 kg

3. White cement 300 kg, gray calcium 150 kg, quartz sand 200 kg, double fly powder 350 kg, rubber powder 12-15 kg

4. Anti-crack and anti-seepage putty powder for external walls: 350 kg of white cement, 170 kg of gray calcium, 150-200 kg of quartz sand (100 mesh), 300 kg of quartz powder, 0.1 kg of wood fiber, 20-25 kg of rubber powder

5. External wall elastic putty powder: white cement (or portland cement) 400 kg, quartz sand (100 mesh) 300 kg, quartz powder 300 kg, rubber powder 18-25 kg