The light ones are like tears, and the serious ones are like the sagging of the paint curtain, which will affect the beauty of the wall..
01.
Today, we have summarized these common problems and attached corresponding solutions, hoping to help you make a more perfect coating effect.
Causes of problems: ► interior wall coating is used outdoors ► bought fake and shoddy products ► excessively diluted, the paint film is too thin, and the resin can not effectively bond the pigments and fillers.
Wall pulverization wall pulverization phenomenon, that is, what we usually call “powder falling”.
Solution: ► remove all affected paint films that lose adhesion, clean the wall and wait for it to dry out ► if the substrate is seriously powdered, seal it with appropriate permeable primer ► follow the construction specifications and make a good waterproof layer of the substrate to ensure that the substrate conditions meet the construction requirements ► use appropriate primer ► follow the construction specifications, Do not dilute the wall excessively.
As the saying goes, “three coatings, seven construction”, it can be seen that the construction has a great impact on the coating effect.
There is a thin layer of powder on the surface of the coating film, which will fall off immediately after wiping.
Cause of the problem: ► poor weather resistance of organic pigments, discoloration under ultraviolet irradiation ► too high base alkalinity, which will destroy the pigments in the paint film after exudation ► salt and alkali will precipitate on the surface ► if the dark paint film is powdered, the color will also become lighter.
However, for some unskilled construction personnel, it is inevitable to encounter various problems in the construction process.
Solution: ► select the paint with darker color, which usually has better weather resistance and alkali resistance ► follow the construction specifications to ensure that the base alkalinity meets the construction requirements, Especially for the post repair part ► seal the base with appropriate primer ► select water paint with good weather resistance ► 04 ► wall alkali flashing is due to the precipitation of salt and alkali on the surface of the coating film, forming white sagging on the surface or damaging the adhesion of the paint film.
When the water vapor volatilizes, the salt and alkali will be brought out and precipitated on the bottom layer or surface of the paint film ► the substrate is seriously powdered or there is no dust removal after grinding ► the waterproof treatment during civil engineering is poor, resulting in rainwater entering the substrate on the other side of the wall through cracks or unpainted base surface, Bring out the saline alkali during diffusion ► the selected primer does not adapt to the substrate.
Common contractors and materials appear in order to save materials ► the substrate is too loose, the resin infiltrates into the substrate too much, and the pigments and fillers cannot be effectively bonded ► the substrate temperature is too low during construction, the film formation is poor ► the substrate and environmental humidity are too high, the recoating time is short, and the ventilation is poor, The film cannot be completely formed ► the base is too alkaline and the paint film is damaged ► the solution of incomplete film formation during painting: ► remove the powdered layer, clean the powdered matter, wash it with water, dry it or paint the building adhesive glue ► the wall temperature is lower than 8 ℃ and should not be constructed ► follow the construction specifications, adjust it according to the concentration of the coating, and do not dilute it too much ► if necessary, select a suitable primer to seal the base, Improve its adhesion ► it is recommended to apply two layers of interior wall paint with good weather resistance ► 02 ► uneven wall gloss refers to uneven gloss of the coating film, light and dark distribution, which often occurs in mercerized and semi gloss products.
Cause of the problem: ► uneven substrate porosity and different adsorption ► uneven construction thickness of primer and finish coat ► local dry spraying during spraying ► different construction tools are used for the same wall ► products of different batch numbers are used for the same wall ► ineffective “wet connection” and obvious joint mark ► excessive substrate temperature or poor putty quality, loose and rapid drying of coating solution: ► use primer, especially for local repair, The top coat must be applied after the same primer as the surrounding ► ensure that the thickness of each layer is consistent and there is no missing brush ► ensure that consistent tools are used, products of the same batch number are used on the same wall, and wet connection is ensured in the division area ► ensure that the construction conditions and construction process meet the requirements ► select appropriate diluent to adjust the drying time of the coating according to different climate ► 03 ► wall discoloration, discoloration, uniform or uneven change of film color, The overall hair is flowered, especially on the red or yellow wall.
Solid Lifting Socket Cross Pin
► the moisture content of the substrate is too high, and the alkali or salt content is too high.
Cause of the problem: ► the substrate is not clean, there are grease, release agent, etc.
If the wall hangs on the painted surface or the groove of the line corner, the paint will flow and form uneven thickness of the paint film.
► common problems and corresponding solutions in the construction of home decoration wall.
