What are the reasons for exterior wall really stone paint pollution?

True stone lacquer is a cost-effective wall decorative paint products. However, often find many walls in 1 - really stone paint projects Obvious pollution problems two years later, the original facade dignified atmosphere suddenly becomes ugly. Due to the mechanism of the rough, compared with other coating product, it is relatively easy to be polluted, but it is not insurmountable. Pollution caused by wrong product formula: Low content of emulsion] After spraying really stone paint, need to complete the film. Single colour sand need with emulsion completely. Color formed by emulsion crosslinking between sand and color sand coating. In this way, timely formation of concave and convex surface, dust attached on the surface only, after the rain of dust will be washed away. Emulsion content is too low, if the color sand is not coated with film, not form a complete coating between colour sand, dust easily penetrate into the gap, accumulate over time, cause the pollution of outside wall really stone paint. ( Sand grading undeserved] Colour sand according to the particle size is divided into ( Coarse to fine) 10 - 20 and 40 - 80 mesh, 80 - 120 mesh, 120 - 180 mesh. Mixed really stone paint, the need to control and reasonable collocation color sand content of different mesh. A simple understanding is that the space between the sand texture with different mesh color sand filling. So, really stone paint film is relatively difficult to dust, can effectively avoid really stone paint the external walls of the phenomenon. ( Poor raw material weatherability] Really stone paint, especially when used in exterior wall decoration, need to have strong weatherability. Emulsion and colour sand need to be able to resist ultraviolet radiation, acid and alkali corrosion, otherwise easy to the pollution problem caused by coating aging. For example, the acid rain in the air is serious at present. Really stone paint color sand in high calcium content, prone to oxidation reaction, accelerating coating aging. For serious acid rain area, must consider the calcined sand coating to resist corrosion of acid rain. Improper construction pollution [ Insufficient flatness before] Poor flatness of surface rendering, forming obvious concave and convex surface, concave easy to accumulate dust over time. Improper spraying method [ Pollution] Spraying really stone paint, the calibre of the spray gun should be according to the color of sand composite particle size distribution is reasonable choice. At the same time, should control the air pressure and spray gun and the distance of metope, to ensure that the film is not too rough, and can be fully formed. ( Paint coating leakage pollution] Construction unit saves paint protection procedures, in order to solve the cost or worry about the problem of uneven paint coating. Transparent protection paint in really stone paint surface are the main functions of form a complete protective film, can effectively reduce the pollution. The summary of the above is really stone paint pollution reasons. I hope this will be helpful to your application.