Fluorocarbon spray: fluorocarbon spray coating made of polyvinylidene fluoride resin nCH2CF2 baking (CH2CF2)n (PVDF) or metal aluminum powder as coloring material is coated with aluminum by electrostatic liquid phase spraying method. The surface of the alloy. Fluorocarbon coating is widely used in aluminum (plastic) panels/curtain walls. Due to its excellent characteristics, it is more and more favored and favored by the construction industry and users. The surface of fluorocarbon coating is fine and smooth, and the common colors are flash silver. Gray, dark gray. The fluorocarbon sprayed aluminum alloy profile is basically subjected to primer pretreatment, and the silicone structural sealant can form a good bond with it. Therefore, powder coating and fluorocarbon sprayed aluminum alloy profiles are used for glass curtain walls. Under normal circumstances, the adhesive surface will not be sprayed (especially fluorocarbon spray) and only the previous chromium treatment, after chromization Common colors are golden yellow, silver white, and blue white. The bonding of the silicone structural sealant to the chromed aluminum alloy profile is also preferred. In practical applications, even if the surface characteristics of the aluminum alloy profiles produced by the same surface treatment method and different manufacturers are not the same, the silicone structural sealant may have a completely different bonding effect, and must be carried out before the glue is used. The adhesion test was pre-judgmented.