Is exterior wall putty waterproof? What should I pay attention to when using it?

Exterior wall putty powder has a certain waterproof function and is widely used in decoration. The following are some points you need to pay attention to when using exterior wall putty powder:

Exterior wall putty powder is relatively strong and the construction is relatively complicated. It is generally not mixed with interior wall putty powder.

Exterior wall putty powder contains a high cement content and is therefore highly alkaline.

Interior wall putty powder is relatively fine, more suitable for interior wall construction characteristics, and has better polishability than exterior wall putty powder.

The ingredients are different. The exterior wall putty powder is mainly white cement, while the interior wall putty powder is mainly made of old powder and talcum powder.

Water resistance is different. Exterior wall putty powder has good water resistance after drying, which mainly depends on the cement content or rubber powder content.

When using it, add water to the exterior wall putty powder and stir it into a paste, let it sit for a while, and then apply it to the wall. Generally, the thickness should not exceed 2-3mm. You can increase the thickness by wiping it in 1-3 passes as needed.

It should be noted that before construction, ensure that the construction environment temperature is not lower than 5℃, and avoid construction in rainy weather. In addition, since dry exterior wall putty powder has good water retention capacity, it can slow down solidification and prevent early drying and shrinkage cracks, so you must wait until it is completely dry before proceeding with the construction of the next layer.