Why is it inappropriate for exterior wall putty powder to be used on interior walls?

1. Different alkali content
Generally speaking, the alkali content of exterior wall putty powder is higher than that of interior wall putty powder.

2. The difficulty of construction and the price are different
The construction difficulty of exterior wall putty is much more difficult than that of interior wall putty. Generally speaking, the price of exterior wall putty is more expensive than that of interior wall putty.

3. Different environmental protection
Because the exterior wall putty has to resist wind and sun, it has high viscosity and high strength, but the environmental protection index is slightly lower. On the contrary, putty for internal walls is more healthy and environmentally friendly, so internal walls are not used for external use, and external walls are not for internal use.

4. Different performance
The inner wall putty is relatively delicate, so it will hollow out and even fall off when it encounters water; while the outer wall putty is relatively rough, but it has good waterproof performance.

5. Different composition and water resistance
Due to the different formulations of the two putty powders, the exterior wall putty powder is mainly white cement, while the interior wall putty powder is mainly talc powder and old powder. Therefore, the former is relatively strong in water resistance and hardness, even if it encounters water, it will not be softened; while the latter is relatively poor in water resistance and strength compared to exterior wall putty powder, and it can be scratched with a light nail. , It will soften when it encounters water.