What is the reaction of not brushing the sealing primer before the wall is painted

The main purpose of brushing the primer is to prevent alkali return. The so-called alkali return refers to the alkaline substances in the cement through the coating, seeping out. The main manifestation is that there will be a layer of white powder on the surface of the paint.

How to paint the wall:

Sequence of operation: base grinding, putty scraping, grinding, primer brushing, sanding, topcoat.

I have to brush the paint several times, I saved a little in the front, generally speaking, two sides and one bottom (two topcoats and one primer) work best.

The function of putty is to flatten the wall, flatten the uneven or potholes on the wall, and then brush the primer, and the role of the primer is to resist alkali and moisture, in order to protect the topcoat, so that the topcoat can be durable.

The main aspects of brushing primer lie in several aspects, one is that brushing primer is to fill the role, you don't look carefully at the wall that has just been finished, it seems to be very smooth and smooth, but a closer look will find that there are many small uneven places and cracks, and the primer is to fill these uneven places.

Second, the primer has its own effects, such as anti-alkali and anti-mildew, which can increase the service life of the topcoat and reduce the possibility of barely getting wet.

Moreover, if the small bumps are filled, the amount of topcoat used at the end will also be reduced, so it is still necessary to use a primer

The wall primer that goes with the latex paint must be applied, followed by the topcoat. Both the primer and topcoat can be slightly thinner according to the product instructions to avoid brush marks. But it can't be too thin.

Generally 10% to 30%. Excessive dilution will lead to poor film formation, and its texture, scrub resistance, and durability will be damaged to varying degrees. Wait for each coat to dry before applying it a second time.

The fact that there is a market for the primer shows its value, and at present, consumers are paying more and more attention to the role of the primer.

The primer is applied between the putty and the topcoat to seal the erosion of the alkaline substance on the cement wall to the topcoat, and at the same time isolate the moisture in the cement, so that the topcoat is not easy to peel and blister.

When my house was renovated, the walls were blank, and the construction master told me not to move anything. Then use the diatom mud of the brand of Qindao Sea Source to paint directly on the wall. . . It saves time and effort, and the effect is particularly good.

As long as the wall is flat, no cracks, no blistering, it can be applied directly, it is best to spray citric acid monohydrate before construction, and then use shell powder biological wall paint. Yes.

In general, the resistance key function of brushing latex paint and primer is not the same, and its biggest feature is closure and alkali resistance, the sealing of the general primer can make the wall foundation not damp to keep it dry, the hardness of the primer of the general latex paint is stronger than the topcoat, and the elasticity is poor than the specific area, and the sealing primer of moisture is stronger than the topcoat, which is why the primer is used.

If you don't use a primer and paint it directly, it will look good at the time, but after a few months, you will use the bag and fall off! However, you can do without the topcoat and apply the primer directly, but the wall is not as beautiful as the top paint. If you have more questions, you can click on ID to consult.

The primer and topcoat are all latex paints, which are generally used together, and their functions are different.

Primer: The primer plays a role in sealing, isolating, moisture-proof and mildew-proof, and can also play a role in covering and increasing adhesion.

When painting the wall, you can brush the primer after the putty is dry, generally do the primer twice, the topcoat three times, and each time the paint must be dried before the next time.

When brushing the primer, the wall eats a large amount of paint, and the primer should add a little more water to ensure that it can be painted evenly.

When brushing the topcoat, do not add too much water, which will affect the thickness of the paint film, the feel and the hardness of the paint film.

The function of the primer is to seal the wall, resist the alkaline substance seeping out of the cement layer of the wall, the primer can also enhance the hardness of the wall batch ash layer, and can also improve the adhesion of the topcoat, because the primer closes the wall, prevents the absorption of the wall on the topcoat, and the topcoat is left on the surface, thus improving the fullness of the topcoat.

Only in the engineering decoration with very low requirements (such as wall whitewashing or underground engineering), the primer is not used for the sake of the environment and the use of the environment, the effect of home decoration is required by the advanced decoration, the service life is relatively long, the cost can also be afforded, it is recommended to use the primer.

The role of the primer:

Closure: Some walls are more alkaline, and alkaline flowers are produced after being soaked in moisture and water, the scientific name is "pan alkali", which causes the formation of crater-like protrusions on the surface of the paint film, and forms a layer of alkali cream on the surface of the paint film in serious cases, which eventually destroys the paint film. Latex paint primers can act as a sealant to alleviate this situation.

Adhesion: The emulsion content in the primer is higher and the adhesion is stronger. It can improve the adhesion between the latex paint film and the wall.

Filling: If the wall is not alkaline and relatively flat, you can do without primer, of course, it is better to use it.

Not all latex paints need to be brushed with primer, it is related to **, hiding power, etc.; Generally, if the 5L package is more than 200 yuan, most of them have a matching primer; Most of the latex paints that cost a hundred or dozens of dollars are used directly, without a primer. You can ask those who don't paint primer, how much is the ** of latex paint they buy. The hiding power is related to the formula of the latex paint variety.

If you have a primer that you can buy as a kit, then you must use a primer. The function of the primer is that it strengthens the wall putty layer and seals the surface of the putty layer to increase the adhesion of the latex paint. Generally, there is a latex paint with a matching primer, which is relatively thin; Latex paint without a matching primer is relatively thicker.

If you want to add water, the former can only add a small amount of water, and the latter can add a little more than the former. However, if you can't blindly add water, you should follow the amount on the package instructions.

The biggest role played by the primer is the sealing and alkali resistance. Due to the sealing performance of the primer, the primer can effectively prevent mildew and moisture, which can be said to be a must-use product for users who suffer from moisture during the rainy season in the south.

So the north is drier, do you still need to use a primer? This is another property of the primer, which is alkaline resistance. We all know that the surface of the wall is very alkaline, so the harm of the alkaline wall is that if the alkali is serious, it will cause the wall to bloom, which will seriously affect the beauty of the new house.

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I am glad to answer for you, the consequences of not brushing the primer of latex paint, not brushing the primer is easy to have problems, and the later stage will face a large rework of the potato cleaning situation. In particular, if the putty is not water-resistant, it cannot resist the water in the latex paint, which will lead to the cracking of the putty layer, and may be separated from the base layer, etc., if it encounters more humid weather, the wall skin will be rolled Extended InformationLatex paint is a kind of water-based paint prepared by adding pigments, fillers and various additives to synthetic resin emulsion as the base material, also known as synthetic resin emulsion coating, which is a kind of organic coating. All coatings that use water as a solvent or as a dispersion medium can be called water-based coatings, including water-soluble coatings, water-dilution coatings, and water-dispersible coatings (latex coatings).

According to the different production of raw materials, latex paint mainly includes polyvinyl acetate latex paint, ethylene propylene latex paint, pure acrylic latex paint and other varieties, according to the product applicable to different environments, can be divided into interior wall and exterior wall latex paint, according to the gloss effect of decoration can be divided into matte, matte, semi-gloss, mercerized and glossy types. Hope mine can help you! <>

If the wall is not water-resistant putty, it can not resist the infiltration of water in the latex paint topcoat, and the result is that the putty layer cracks, and even becomes inseparable from the base layer, and this is the most fatal, once the moisture, the wall skin will be rolled, and the only solution is to rework.

The function of the primer is to separate the topcoat from the putty layer, to prevent the alkali from being exposed to the bottom, and to prevent the water in the topcoat from infiltrating the putty layer.

The putty layer of the interior wall is afraid of water, I don't believe you can spray some water with a watering can, and look at it again every two days.

Without priming, cracking of latex paint is inevitable (caused by cracking of the putty layer), unless you approve water-resistant putty.

The primer is painted, and the topcoat is not only positive in color, but also very economical.

1. The primer is the first layer of the paint system, which is used to improve the adhesion of the topcoat, increase the fullness of the topcoat, provide alkali resistance, provide anti-corrosion function, etc., and at the same time ensure the uniform absorption of the topcoat and make the paint system play the best effect. Topcoat *** can do without primer, this statement is not correct, because the function of topcoat and primer is different, topcoat is more focused on the final decoration and apparent effect, while primer focuses on improving adhesion, anti-corrosion function, alkali resistance, etc.

Second, home decoration is necessary to use primer, which requires firm adhesion on the surface of the object to increase the adhesion of the upper layer of paint and improve the decoration of the topcoat. According to the coating requirements, it can be divided into the first primer, the second primer, etc. The more commonly used primers are:

1.Iron red cathode electrophoresis primer: This paint film has good adhesion and corrosion resistance, which is more superior than anode electrophoresis primer, suitable for primer of metal parts, especially suitable for primer of iron and steel products.

2.New metal anticorrosive primer: the paint dries quickly, has strong adhesion, good mechanical properties, and has good oil resistance, rust resistance and corrosion resistance. It is mainly used for the bottom coating of various automobile bodies, cabins and parts.

3.Phosphating primer: used as a primer for serum-based materials.

4.Aminoalkyd acid secondary primer: used for intermediate coatings. It is suitable for use on primed and sanded putty layers to fill the sand holes and lines of the putty layer.

5.New Wood Closure Primer: Suitable for Wood Closure Primer, Decorative and Architectural Coatings.

6.New metal primer: used as a primer for metal surfaces.

7.New zinc-rich primer: used in shipyard underwater metal surface coating and chemical anti-corrosion metal primer.

8.Iron red alkyd resin primer: used to coat the surface of steel with a more uniform rust layer.

9.Rubber alkyd primer: brushed or sprayed on treated metal surfaces.

10.Zinc yellow polyurethane primer: suitable for the base coating of railways, bridges and various metal equipment.

11.Acrylic epoxy resin primer: It has good salt spray resistance, damp heat resistance and good mechanical properties, has good adhesion to metal surfaces, and can be used as an excellent anti-rust primer.

12.New polyphenol oxygen pre-coat primer: used in machinery and vehicles, equipment, shipbuilding and other industries.

13.Epoxy primers in various colors: suitable for coating light metal surfaces.

14.New asphalt ship primer: suitable for the underwater part of the ship, can also be used as an isolation layer between aluminum powder asphalt ship primer and asphalt antifouling paint.

I'm specialized in decoration, I've never heard of latex paint Peiyu primer, you should be talking about paint! If the oil is covering the paint, I recommend that you use a primer, and the paint that does not need to be brushed out is not good-looking and can not withstand the use of Zhongzhou.

The primer of latex paint can play the role of mildew-proof, waterproof and alkali-resistant; Make the topcoat not easy to turn yellow and discolor.