What are the causes of large-area peeling and falling off of real stone paint?

With the continuous development of society, the use of real stone paint has become increasingly popular. It is usually applied to exterior walls to present the texture of natural stone, adapt to various climates, and has a relatively long service life. However, sometimes largearea peeling of this coating can be observed. What causes this problem? Let the editor from Runli, a real stone paint manufacturer, explain the reasons:

I. Poor quality and insufficient adhesion of putty

If the resin content in the putty is inadequate, the putty itself will tend to powder. Once the putty layer lacks structural strength, even the best topcoat can be easily peeled off the wall.

II. Lowquality primer that fails to function properly

The primer for real stone paint serves two main purposes:

Alkali sealing: Prevents alkaline substances from penetrating to the surface and affecting the visual appearance.Bonding: Penetrates into the base layer, strengthens the putty layer, and acts as a bridge between the putty and the topcoat.If the primer cannot firmly bond the putty, it loses its function, and the paint film can still be peeled off the wall after application.

III. Primer applied before the putty is completely dry

The drying time of the putty layer largely depends on the prevailing weather conditions. It dries faster in good weather with low humidity, and slower under opposite conditions. The putty layer must be fully dry before sanding and applying real stone paint.

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IV. Excessive residual dust on the wall

Too much residual dust can also cause separation between the wall surface and the putty layer. To avoid common paint film problems, common mistakes should be prevented during construction, such as carrying out basic cleaning of the wall, paying attention to the wall moisture content, choosing suitable putty, applying primer instead of directly applying topcoat, and so on.

The above are the main reasons for largearea peeling of real stone paint: poor quality and insufficient adhesion of putty, lowquality primer that fails to function, applying primer before the putty is completely dry, and excessive residual dust on the wall. Therefore, after understanding these causes, we should pay attention to these aspects during construction.

Founded in 1999, Runli New Material is a modern group enterprise integrating coating production, R&D, sales and service. It was listed on the Shanghai Equity Exchange on October 13, 2014, becoming a listed coating enterprise in Guangdong. Runli Group has four major brands: Runli Intelligent Paint, Qiba Paint, Rundian Waterborne Paint, and Color Digital Paint.

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