One. How long does putty powder take to set?
Applying putty powder typically requires 1-3 coats, with a normal drying time of 1-2 days between coats. Additionally, the drying time should be extended as much as possible based on actual weather conditions, generally aiming for 2-3 days.
Check if the putty powder is completely dry. You can observe its color: the putty powder will turn gray when wet, and will become whiter as it dries. You can also feel the putty powder with your hand: when it is still wet, it will feel slightly cool. once it is completely dry, it will feel normal. It is recommended to let the putty powder dry for a few more days before applying latex paint. Applying latex paint to wet putty powder can cause cracking and detachment of the paint.
Two. Is it possible to ventilate after applying putty powder?
After applying the putty powder, do not immediately open windows for ventilation, as the substrate is still relatively wet after application. This can lead to peeling and cracking due to uneven airflow.
Generally, after applying putty powder and allowing it to dry for 24 hours, open windows to ventilate and exchange air, which facilitates the oxidation and drying of the wall surface and the release of harmful gases.
Furthermore, if it rains or is foggy after applying putty powder, it is best to avoid opening windows for ventilation. Rainy and foggy days have high humidity, and ventilation at this time can negatively affect the adhesion of the putty powder, leading to detachment.