Does the anti-crack mortar need cement?
You can't. Anti-crack mortar is a kind of dry powder mortar, which has certain functions. It is made through the best ratio test in the laboratory and mechanized production. If some cement and sand are added at will, the performance of anti-crack mortar will be reduced. Therefore, the special dry powder mortar must be used according to the instructions, and additives such as cement and sand cannot be added.
What are the precautions for using anti-crack mortar?
1, when using anti-crack mortar, the bottom impurities must be cleaned first. For some uneven places, it is necessary to repair them. After the wall surface is treated, you can spray water to keep the wall surface moist.
2, need to put this interface agent evenly on the wall, but also along this gap with anti-crack mortar, generally with about 3mm, remember, in the construction process, be sure to join the grid cloth, and then smooth with mortar.
3. To clean up the wall, at the same time to ensure that the insulation layer and the base are firm, there can be no empty drum, cracks and other problems.
4. Finally, after painting the wall, we should clean up the construction site and recycle some fallen mortar for reuse. In addition, keep the surrounding environment ventilated and dry, and do not water it for maintenance, usually after 7 days.
Summary: Cement can't be added, because there is polymer emulsion in the anti-crack mortar, which is made according to the prepared proportion. If cement is added, it is easy to destroy the specific gravity and change the hardness, so cement cannot be added to the anti-crack mortar.