【 Building materials network 】 Lacquer It's a realistic presentation Granite Textured exterior wall decoration materials can fully show the nature Stone The texture effect of. Normally, stone like paint has weather resistance and water resistance, and can be suitable for various climates. Generally, the service life is 10-15 years.

However, many stone like paints often fail to meet the actual standards, resulting in falling off, whitening, yellowing and other phenomena, 3 points coating Seven points construction, about Exterior wall coating The causes of various problems are complex, and not necessarily a symptom is a cause. Some time ago, the person in charge of a construction team came to consult, and the paint film of a project they were responsible for was torn off like paper. From the photos sent, it does not mean that the paint is bad, on the contrary, the wall that can form a film is connected together Topcoat On the contrary, the content of emulsion is relatively high, and the quality of paint is relatively good.

If there is no trauma on the wall and the paint and finish flake off, there are several possible reasons:

01 putty Poor quality and viscosity

The glue in putty is one of the important components of various putty, which mainly plays the role of connecting various substances. If the glue content of putty is not enough, the putty itself will lose powder. If the putty itself is not strong, even the best finish can be easily removed from the wall.

02 Primer No use or poor quality primer, it doesn't work

The role of primer: First, it is used to seal the alkali to prevent the alkali from penetrating into the surface and affecting the visual effect of the surface. The second is to fix the bottom, penetrate into the base course, tighten the putty layer, and play the role of connecting the putty and finish paint. If the primer cannot fasten the putty, it will lose the function of this code, and it will also make Latex paint It can be torn off the wall. Some coatings pin Merchants sell the finish paint as the primer, which confuses the public and will cause problems sooner or later, because the function of the primer is completely different from that of the finish paint.

03 Primer the putty before it dries, and apply the second coat of paint before it dries

The length of time for the putty to completely dry has a great relationship with the climatic conditions at that time. If the weather is good and the air humidity is not high, the time required for the putty layer to dry will be shorter, otherwise it will be longer. In good weather (when the temperature is about 25 °), putty can be applied once a day, and it usually takes three days to apply putty twice. In this process, there is no need to worry. You must wait until the putty layer is completely dry before polishing and painting.

The drying time of primer and finish shall be based on the actual weather conditions. When it is rainy and the air humidity is high, the interval time shall be appropriately extended. Generally, the first finishing coat can be brushed 3 to 4 hours after the primer is brushed. Generally, the second finishing coat can be brushed 2 to 3 hours after the surface of the first finishing coat is dry.

04 Too much ash on the wall

Too much ash will also affect the wall surface and putty layering. If you want to avoid some common paint problems, you should avoid some common mistakes during construction, such as basic cleaning of the wall, attention should also be paid to the humidity of the wall, the putty should be selected properly, the primer should be used, and do not paint directly.

In order to prevent the falling off of stone like paint in pieces, the construction personnel should have a clear understanding of the construction procedures and requirements of stone like paint products before construction, and have skilled construction skills to ensure that the paint can achieve a good decorative effect of zui.