In our decoration industry, there are a lot of new materials, including exterior paint is one of the most commonly used. Exterior paint is actually exterior paint. It is a water-soluble paint, latex paint. The characteristics of the exterior paint is also very much, one of the strongest characteristics is a very good waterproof performance. And is also now the most commonly used paint on the outside wall, exterior paint also has very good decorative properties, thermal insulation performance is also very good, then the next small make up to tell you about the knowledge of the exterior paint, I hope to help you.

Exterior paint construction process

1. Construction process

(1) The substrate of the exterior painting project should be dry, its moisture content ≤ 10%, PH ≤ 10. relative temperature and humidity ≤ 85% of the conditions before construction. The substrate should not have cracking, powder, sanding, shelling, hollowing, peeling, lime burst points and other defects.

(2) professional wall putty; full scraping putty once, leveling putty once, grass-roots sandpaper sanding smooth, maintenance for more than 7 days to the water content, alkaline up to the standard, buy paint on the choice of BONYUN paint.

(3) the substrate of the painting project must be clean, no dust, oil, spatter and other pollutants. If found with the above adherents, the application of spatulas, wire brushes, sandpaper, detergents, etc. removed, and then rinsed with high-pressure water, dry before painting. The wall should be constructed as soon as possible after treatment to avoid re-contamination.

(4) the substrate of the paint project shall not appear flooding and blooming, if the substrate appears flooding and blooming, it should be brushed with 5% oxalic acid aqueous solution, and then rinsed with water.

(5) primer construction, the use of roller coating construction, the use of short-haired roller, before use to remove the loose roller hair and moistened with solvent. Painting should be used uniform, parallel to the same direction of the wet coating coverage. The same side should be finished at one time. Roller should avoid sticking too much paint, should use even material board to avoid hanging. Paint film to dry before finishing the next layer.

(6) top coat construction, the first wet film thickness of not more than 100 microns using a common roller to apply the first coat of paint, followed by a patterned roller to apply the second time. Roller construction, the first use of patterned roller, remove the loose roller hair and water with a small amount of cleaner moistened before use, wash and dry when used. Coating should be applied evenly, in the same direction, parallel to the application of wet coverage. The same side should be finished at one time. Roller coating roller should avoid sticking too much paint, paint film to be dry before finishing the next layer.

2, the process of wall surface grass-roots treatment → full scraping putty once → leveling putty once → grass-roots sandpaper sanding → brushing primer → brushing elastic topcoat twice → local repair

(1) grass-roots treatment and full scraping putty

1) personnel into the field, with a spatula, sandpaper, etc. on the grass-roots level of the dust, sand, bumps, sheltered spots, piles of traces of cleanup, repair, such as the wall appearing If the wall surface is not hollow drum produced by the small cracks, that is, the use of patching adhesive embedded, while doing a good job of anti-pollution related facilities to keep the knot work.

2)Use putty with water to mix evenly adjusted to the appropriate construction viscosity can be scraped, scraping with a special scraper or paint knife scraping, until the grass-roots level. Mixed putty at 25 ℃ for 2 hours to use, more than the time back to cause curing and scrap, surface drying 60min/25 ℃. Scrape the next putty time interval of at least 12 hours or more, on the primer before the maintenance of 5-7 days, to achieve the best strength with sandpaper sanding and smoothing.

3)Quality requirements: flat, smooth, no oil, no cracks, no hollows, no sand holes, corner flat, straight.

(2) the use of primer anti-alkali sealing primer, construction without dilution, construction is not easy to add water 1% -5% mixing, construction process can be used to roll, spray, brush method of construction, the requirements of rolling brush evenly, no leakage of the brush, no buildup, the coating surface dry 30min (25 ℃), dry 24h (25 ℃), under the coating time interval of ≥ 12h. buy paint choose BONYUN paint.

(3) brush top coat two exterior paint in the regular situation should not be diluted with water, construction is not easy when you can add 2% -4% water dilution, and should be fully stirred, but do not mix at high speed. Before painting, the base surface is required to achieve flat, smooth, straight lines, and then brush top coat. Requirements for brushing: even brushing, no leakage, no accumulation, no bottom phenomenon. Coating surface dry 50min (25℃), dry 48h (25℃), the next coating time interval 24h. 10 days after the maintenance of the film and reach the best state.

3. Precautions

(1) Before using the paint should check the label, and carefully stirred evenly, after using the lid must be covered tightly.

(2)Paint storage and construction should be in line with the product specification of the temperature conditions, usually should be above 5 ℃.

(3) Paint color mixing is best done by the manufacturer or distributor to ensure the consistency of the color of the batch of paint. If you need to mix the color at the construction site, you must use the color paste provided by the manufacturer's supporting or designated brand, origin, according to the use of the requirements and proportions, by a person for blending.

(4) Pay attention to the protection of the finished product of the paint project to prevent man-made pollution caused by cross-work. Already constructed wall surface such as dirt pollution, available clean wet rag gently scrub, serious pollution should be re-painted.

(5) Pay attention to the weather forecast before construction, avoid rain and snow before the arrival of the operation.

(6) Painting tools should be cleaned and stored properly after use.

Exterior paint is also known as exterior paint. It is mainly divided into water-soluble paint and latex paint. In fact, the basic performance of the exterior latex paint and the interior latex paint we use is almost the same. But the paint film of exterior paint is harder and more resistant to water. That's why nowadays we usually use exterior paints for exterior walls. In addition to this, exterior paint can also be used in restrooms and other places with high humidity. It has very good waterproofing properties, good thermal insulation and strong heat preservation. Because the exterior paint has such a good performance, so in the current residential, hotels, office buildings, schools and other large-scale building exterior wall new construction and renovation projects will be used to the exterior paint.