metal fluorocarbon paint construction method reference!

Construction requirements and construction technology

First of all, the requirements of metal fluorocarbon paint on the base of the exterior wall

① The new cement mortar and concrete surface shall be dried for a reasonable period of time to make the water content ≤ 8% and PH ≤ 10;

② The base should be firm, no powder, no sand, no hollowing, no cracking, no peeling; The surface should be clean, no dust, no floating slurry, no oil, no embroidery spots, no mildew points, no salt and other sundries;

③ The surface painting layer of the base layer must be solid and firm, and there should be no defects such as cracks and hollowing. The yin and yang angles of the painted base layer must be vertical and square, and there must be no missing edges and corners.

Secondly, the construction process of metal fluorocarbon paint:

① Basic treatment

dust removal: dust removal with a rag, the more seriously polluted parts of the use of high-pressure water gun for washing and cleaning. If the dust is not thorough, the paint will not be able to get a smooth coating after construction, there will be particles.

grinding: use 600~800 mesh fine sandpaper sanding. When sanding, the force should not be too heavy, so as not to wear the primer coating, but it must be carefully and thoroughly. Otherwise, after the topcoat is sprayed, a smooth coating film will not be obtained, and even uneven light and shade (flower) will appear.

② Putty layer construction

batch scraping elastic crack-resistant leveling putty: mix putty according to the product specification, batch scraping once to level the base layer, and local unleveled surfaces can be leveled twice.

putty layer surface has a layer thickness of about 50 ~ 80μm thick coating, no leakage phenomenon.

③ Special sealing primer construction

Spray the special sealing primer for metallic paint: spray the special sealing primer for elastic metallic paint after the putty layer has passed the acceptance. The paint film shall be uniform and continuous during spraying.

④ Construction of anti-rust middle layer paint

Spray elastic fluorocarbon intermediate layer paint. The paint film is required to be uniform during spraying. Each separating surface can be sprayed separately, or multiple separating surfaces can be sprayed continuously.

⑤ Metal fluorocarbon paint construction

intermediate paint. The paint film is required to be uniform during spraying. Each separating surface can be sprayed separately, or multiple separating surfaces can be sprayed continuously.

(Note: Different color metallic paint construction, at the junction of the need to focus on strengthening protection, and a color of the construction in another color after drying.)

⑥ Spraying finish coat

The matching topcoat shall be sprayed on the completely dried metal surface, with uniform thickness and no omission.

drying time: at least 15 hours.

Note:

Construction requirements:After spraying, the glitter powder is evenly distributed, the density is equivalent to that of the sample plate, there is no sagging phenomenon, no uneven light and shade and blooming phenomenon, the hand feeling is fine, and there are few particles on the coating film.

construction ratio:After mixing the main paint and curing agent in strict accordance with the manufacturer's instructions, add an appropriate amount of diluent (adjust the viscosity according to climate and temperature to apply -4 cups for 18-23 seconds), filter with a 100 mesh filter screen, and use it up within 4 hours, otherwise the mixture will gel and deteriorate, affecting its sealing effect and adhesion.