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[Construction] Flat coating construction process of elastic coating for exterior wall

[Construction] Flat coating construction process of elastic coating for exterior wall

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  • Time of issue:2020-12-29
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(Summary description)Let the new cement on the wall mature for at least one month to reduce the alkalinity of the wall appropriately and make the wall dry. The moisture content of the wall must be less than 10%; if the ambient temperature is low, the wall is ready to dry The time has been extended accordingly.

[Construction] Flat coating construction process of elastic coating for exterior wall

(Summary description)Let the new cement on the wall mature for at least one month to reduce the alkalinity of the wall appropriately and make the wall dry. The moisture content of the wall must be less than 10%; if the ambient temperature is low, the wall is ready to dry The time has been extended accordingly.

  • Categories:Company News
  • Author:
  • Origin:
  • Time of issue:2020-12-29
  • Views:0
Information

       Grassroots processing

       1. Let the new cement on the wall mature for at least one month to reduce the alkalinity of the wall appropriately and make the wall dry. The moisture content of the wall must be less than 10%; if the ambient temperature is low, the wall is ready to dry The time has been extended accordingly.

       2. Remove dust and other adherents on the surface of the base layer. Use zinc sulfate solution or dilute hydrochloric acid solution to scrub the wall surface efflorescence, oil stains with detergent, and finally clean with water.

       3. Check the substrate for signs of hollowing

       If the hollow drum is not treated, the coating film will eventually fall off with the hollow drum part of the substrate. Therefore, the empty drum should be removed immediately and repaired. After repairing the hollow part, it needs to be maintained in accordance with the regulations, and the construction can be carried out after reaching the requirements to avoid coating defects. Do not repair on the same day and paint on the next day.

       4. Check for cracks in the substrate

       Regarding the treatment method of cracks, putty is generally used after cleaning; elastic putty should be used for batch embedding cracks to ensure that when the external force further expands the cracks, the putty prevents the appearance of cracks to a certain extent.

Two, putty batch scraping

       If the wall is flat and can meet the construction requirements, there is no need to scrape putty. If you must use putty for leveling, when scraping the putty, you should scrape as little and thinly as possible. The interval between the two putties should not be too short. The first layer of putty film must be thoroughly dried and trimmed before scraping. A top layer putty. Finally, smooth it.

Three, brush the primer

       Apply the special anti-alkali sealing primer evenly with a roller on the cleaned base layer. Do not miss the application, and do not apply too much to cause flow or accumulation.

Before primer application, please confirm whether the substrate meets the coating requirements according to the following requirements:

       1. Flatness: Check with strong light from the side, and there should be no obvious unevenness.

       2. Dense and not loose: Use fingers to dig the wall. It should be hard and not loose. If the substrate is too loose, it will cause the coating film to bubble and fall off during airless spraying.

       3. Water resistance: wipe the wall with your finger in water, the putty should not swell.

       4. Check that the substrate has no defects such as hollow drums, cracks, sand holes, particles, etc.

       5. Cleaning The surface is clean and free of dirt.

Fourth, finish paint construction

        Check whether the type and specifications of the topcoat are consistent with the requirements, whether the quantity is consistent with the area to be painted, and try to increase it as much as possible. The paint should be thoroughly stirred before construction, and the paint should be diluted according to the construction instructions for use.

       1. After the putty is completely dry, (more than 24 hours/25°C), apply the top coat for the first time. Falling is not allowed.

       2. After the first coat of paint has dried (over 2 hours/25°C), apply the second coat of paint. Penetration and falling are not allowed.

Five, brush the varnish

       After passing the acceptance of the top coat, apply the overcoat as a whole to keep the paint without missing, hanging, and consistent.

6. Coating film quality inspection and finishing work

       After painting, all masking equipment should be removed in time, taking care not to damage the wet film. Check that the coating film has no sags, shrinkage holes, overspray, etc. The coating film should be smooth and uniform in color.

Precautions:

       1. The primer and topcoat generally do not need to be diluted. Excessive dilution will cause chalking on the wall. Stir the paint thoroughly before use.

       2. During exterior wall construction, the ambient temperature should not be lower than 5°C; similarly, the ambient temperature should not be too high. If the construction is in the summer high temperature season and the wall is exposed to direct sunlight, please moisten it with water or add 10% water to the paint to prevent the paint from drying too quickly and forming a perfect paint film.

       3. The PH value of the construction wall should be lower than 10, and the moisture content should be lower than 10%.

       4. Pay attention to weather conditions before and after construction, and avoid rain and snow. The paint must be protected from rain and dust when it is applied and before it is dried.

       5. After the construction is completed, there should be a maintenance period of at least 1 week. During this period, attention should be paid to the protection of the wall and avoid touching, cleaning and collision as much as possible.

       6. Avoid skin contamination. If the skin is contaminated, rinse it with soap and water; if it contaminates the eyes, immediately rinse with water or diluted boric acid for at least 10 minutes, and go to the hospital for treatment.

       7. Keep it out of reach of children.

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Time of issue:2020-12-29 13:52:21

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