Yellow real stone paint, which turns blue when it rains, is a black primer with a thickness of 5 kg per square meter.

There may be many problems in your situation. I'll look for some schemes and contents given by Puyuan Coatings Company to analyze for you:

First, the primer is not a sealing primer, but an alkali-resistant sealing primer. Real stone paint itself is acid-resistant but alkali-resistant. If your primer is not well treated or alkali-resistant primer, it is easy to cause frost on the surface.

Second, the uneven spraying of real stone paint in the construction process will lead to uneven thickness, but if you say that the film thickness is about 3mm, this problem must be ruled out.

Third, the quality of real stone paint is not good. The quality of real stone paint can be seen from the price, and the main factor determining the price is emulsion. Low-grade emulsion is generally styrene-acrylic emulsion. This kind of emulsion is not good, it will appear after construction, and it is easy to appear on the wall after rain. The price of this kind of real stone paint will not exceed one kilogram of 6 yuan money, while the price of a good real stone paint is generally between 8- 15 RMB, and the better the emulsion, the more expensive it is.

Fourthly, whether to use the same batch of real stone paint, because the main color matching component of real stone paint is colored stone sand, which is inevitable because there are differences in natural colors. The only way to effectively reduce this phenomenon is to buy the same batch and try to make the seams in the corner, so that it is not easy to see the color difference.