Why do I need to apply surface treatment before applying waterproofing paint?

Pre-coating surface treatment includes the following three aspects:

Remove all kinds of dirt on the surface of the object: such as rust, oxide scale, welding slag, fine sand, dust, scale, wood thorns, resin, release oil, alkaline, etc.

Chemical treatment: such as phosphating treatment before painting of steel parts, oxidation treatment before painting of aluminum parts, special chemical treatment before painting of plastic parts, bleaching and dyeing treatment before painting of wood products, etc.

Carry out polishing and rough treatment: such as smoothing the uneven defects of sheet metal parts by hammering the method, filing off burrs, and polishing with iron sandpaper; For wood products, the wood wool and planer marks should be smoothed. If the surface finish is excessive, it will affect the adhesion of the coating, so it is necessary to use sandpaper to make the surface rough to improve the adhesion of the paint film.

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There are base details that need to be worked on before applying the waterproof coating. Before making waterproof coatings, the base layer should be cleaned and no ash layer should be left. If there are holes, they need to be leveled by the plugging king, so before making the waterproof coating, the base layer needs to be cleaned up, otherwise the waterproof coating can not be completely attached to the base layer, and the waterproof coating will have the danger of falling off, thus affecting the waterproof effect.

For special joints such as yin and yang corners, floor slab leakage, corner joints, etc. Brush the waterproof paint first, then lay the mesh cloth, and then brush after drying to effectively protect the waterproof layer from damage.

1.When applying waterproofing coatings, the waterproofing base layer must be smooth and clean. There must be no cracks in the base.

If there are cracks or unevenness, we should deal with them in time. Until these small phenomena have been treated, we cannot apply waterproofing paint to the substrate. When applying waterproof coatings, if there is sediment in the paint, we must mix well before application.

If you go directly to the wall, there is a high chance that the bulge will crack in the future.

2.After the construction of indoor waterproof coating is completed, we must pay attention to the later protection work to ensure that the waterproof layer is not damaged, minimize the impact on the waterproof layer, and ensure the effect of the waterproof layer. When we apply waterproof paints, we have to buy green products.

Not all waterproofing coatings have high environmental performance. Better waterproof coatings are odorless and harmless to the human body. If there is still open water in the base layer, waterproofing application will dilute the waterproofing coating, resulting in an uneven emulsion.

After the ratio is changed, the surface of the film is easy to whiten.

3.Generally, carefully clean the surface of the base layer first, remove the floating dust, remove the cement agglomeration and loose base; Special treatment should be carried out on the root of the water pipe, the drainage hole, the yin and yang corners, and the cavities left by the wall after the hydropower transformation, and the yin and yang angles should be painted in an arc shape (or V shape). After the treatment, use a brush to sweep away the dust left on the base surface, take an appropriate amount of waterproof paint to dilute it into milk, use a roller to dip the diluted material to the bottom and top, and brush the waterproof surface on the wall first and then completely remove the dust.

The above is the answer to the question of what details need to be dealt with before applying the waterproof coating.

Need to do a good job of the details of the base layer, so that the wall is kept clean, if you find a hole in the wall, you need to fill it with paint, for special joints, you should first brush the waterproof coating, pay attention to the paint can not have sediment, if there is, must be shaken evenly, and then lay the mesh cloth.

Before brushing the waterproof coating, the wall should be trimmed and leveled in time, and then the gaps in the corners should also be connected, the waterproof material should be applied first, and then the mesh cloth should be laid, and then it can be repainted after drying, so as to protect the waterproof layer.

First of all, it is necessary to carry out grassroots cleanup. Many bricklayers do not pay attention to this item, but in fact, a good base layer is very important for waterproof construction. When cleaning the surface, the master not only removed the dust and impurities on the surface, but also leveled the depressions and unevenness.

Then focus on waterproofing the leaky parts. Water leaks in the bathroom tend to be found in walls, corners or drain edges. The master said that before doing formal waterproofing, it is necessary to use waterproof paint to waterproof these places.

This can make the areas that are prone to leakage more waterproof, and avoid hidden dangers in the future.

The gaps must be taken care of, and the ground should be smoother, all preparations should be done, the contact surface should be dried, and it must be kept clean.

<> construction instructions for new polymer cement-based waterproof coatings first emphasize that base surface treatment is the key to waterproof construction, and it is difficult to form a successful waterproof layer without treated base surface. Why is substrate treatment so important?

The requirements for the base surface of the waterproof slurry are as follows:

The substrate must be firm, flat and clean, free of dust, greasy, wax, release agent and other debris substances;

If there are pores, cracks and unequal defects on the base surface, it must be repaired and smoothed with cement mortar in advance, plastic strips are recommended to be pasted on the expansion joints, a layer of non-woven fabric must be added to the nodes, and the nozzle is recommended to be filled with Leibangshi nozzle grouting material;

The yin and yang corners should be wiped into an arc shape (or V-shaped);

Make sure the base surface is sufficiently wet, but there is no open water;

Freshly poured concrete surfaces (including plastered surfaces) should be allowed to dry and set completely before construction.

A good base surface can have the following functions:

Clause. 1. Easy to paint. The clean and flat base surface can greatly improve the construction efficiency, and it is easy to paint, saving man-hours and costs;

Clause. 2. Prevent missing brushes. The clean, flat and firm base surface is more uniform when brushed to prevent leakage caused by leakage or excessive cracking of the waterproof layer caused by uneven brushing;

Clause. Third, the waterproof layer is not easy to be punctured. The substrate with impurities is easy to be punctured after being coated with waterproof slurry, forming cracks and causing leakage crisis;

Clause. Fourth, save waterproof materials. The smooth and clean base surface is conducive to evenly brushing the waterproof slurry, which can greatly save materials and prevent waste;

Clause. Fifth, the solid base surface, the waterproof layer can be firmly bonded with the base surface, and it is not easy to fall off.

Where it is difficult to paint waterproof treatment, such as floor drains, yin and yang corners and other weak positions, it is recommended to do a good job in the construction treatment of waterproof attachment and additional layer, and then paint a large area, and then complete the construction in the later stage, carry out a 24-hour water storage test to observe whether there is water seepage and leakage, and if there is no problem, it is qualified construction.

In addition to standardizing construction, it is also very important to choose high-quality waterproof products, such as Meichaofang water-solid products, which have good coating flexibility and excellent waterproof performance, which can better adapt to the deformation of the base layer and maintain the long-lasting bonding and waterproof impermeability of Kamo.

And in terms of environmental protection, which I am very concerned about, Meisu has also passed the world's four major environmental protection certifications, so that the environmental performance and energy efficiency of its products are excellent, and it is more worthy of our purchase and trust.

First, check first:

1. Do a 24-hour closed water test, that is, after doing a good job of waterproofing, you should fill it with water to see if there is any leakage.

2. After doing the closed water test, see if there is any pumping, and be sure to drain the water.

3. See if the floor drain is blocked.

Second, if it is not for the above reasons, re-do waterproofing:

Clean the base layer, redo the waterproof coating again, and when the construction is painted, the method of rubbing and brushing must be adopted, so that the waterproof coating is best bonded to the base layer.

Because, the waterproof coating is directly done on the surface of the concrete base layer, the best effect, so that there will be no water everywhere, if there is leakage in the later stage, the maintenance can also be grouting repair from the back water surface. Otherwise, if it leaks, it will be troublesome, and it is often necessary to remove the entire decoration interface in order to re-do the waterproofing.

As long as it's not open water, don't care, let it dry naturally, if it's open water, you need to remove the water, and brush up a layer of waterproof paint.

Just let him do it himself. Leave him alone.

Waterproofing is a concealed project, mainly to protect the building from water erosion and keep the interior space from being harmed. The quality of its construction is closely related to the waterproof effect in the later stage, if the waterproofing is not done well, the cashback will be very troublesome in the future, so it is necessary to be particularly cautious when doing waterproof construction. So what problems should be paid attention to when brushing waterproof coatings?

Let's take a look.

Precautions for brushing waterproof paint.

First, do a good job of grassroots processing.

Before doing waterproof construction, it is necessary to carefully clean the base of the wall, pay attention to check whether the base layer is kept free of chalking, dust, peeling, drumming and other phenomena, if there is any, it should be dealt with in time. After the end, use a brush to sweep the dust on the base surface, select an appropriate amount of waterproof paint to debug in proportion, and then use a roller to dip the waterproof material to the bottom-up direction to paint the waterproof surface to do a good job of dust removal effect.

Second, the height of waterproof coating.

First determine the waterproof height, the height is determined according to the needs of the user, the common bathroom waterproof height is 180cm, and the waterproof coating for the non-shower area is 35cm-180cm high. If the lightweight wall is renovated from the bathroom, the waterproof height is the best for the whole wall, and the thickness should be reached to meet the national acceptance specifications.

3. Start painting.

Paint in the direction of the bottom-up, first wall and then the ground. The first time should be painted in the same direction, and the second time should be applied after 4-8 hours, and it is recommended to paint in the opposite direction for better results. When using, if there are bubbles in the slurry, be sure to brush the bubbles open, and pay attention to the presence of bubbles.

Fourth, do a good job of closed water test.

After the waterproof coating is brushed, it must be tested for closed water. Seal the door and drain first, and then wait patiently for 24 hours after the water reaches the height, if the water level does not drop significantly, it is certified. If the water level drops, it proves that there is a problem with the waterproof quality and needs to be re-waterproofed.

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We're glad to answer your questions! To make an interface agent, you don't need to wait for the waterproof coating to dry thoroughly, and the material is generally solid for 24 hours before it can dry, and the time for brushing the second time is not fixed. It depends on the materials you use and the building climate.

Some need to be spaced apart for a day or two, and some only need to be spaced out for a few hours. At the same time, the walls must be completely cleaned and dried after brushing. Only after the old age is penetrated can the putty be scraped off.

Normally, you need to wait for 2 to 3 days to dry, after the interface agent is brushed, you need to open the doors and windows of the house for ventilation, follow the natural maintenance, and wait until the outer layer of the slurry is completely dry and closed before you can scrape the putty in the next step, because if the interface agent is not dry, the putty can not be coated. Hope mine can help you! <>

Waterproof coating is an essential material in waterproof engineering, but in the construction process of waterproof coating, there are often some problems. Next, PCHOUSE will share with you what are the common problems in the construction of waterproof coatings.

1. Add other cement, putty, glue and other substances to the waterproof coating. Waterproof coatings are generally produced under strict scientific proportioning and testing, and if other substances are added to stir and use, the quality of the waterproof coating itself will be affected.

2. The waterproof coating is unevenly painted. The leakage and repeated brushing of the waterproof coating will affect the overall effect of the waterproof layer. Water leakage may occur in the location of the missing brush, and the waterproof layer may be thick enough in the place of thick brushing, bulging, cracking or delamination.

3. Paint in the presence of open water. Once the waterproof coating is in contact with open water, it is easy to destroy the original chemical composition of the waterproof coating, and then dilute the waterproof coating and change the performance of the waterproof coating.

4. The base surface of waterproof construction is not wetted in advance. For some substrates with strong water absorption capacity, if they are not wetted in advance before construction, the substrate may cause the substrate to absorb the moisture of the waterproof layer, resulting in excessive drying of the waterproof layer and drying and powdering.

5. One-time scraping of waterproof coating. The waterproof coating is recommended to be applied in multiple layers thinly, and the one-time coating is too thick, and the waterproof layer is not easy to dry and solidify, which is easy to cause cracking of the waterproof layer in the later stage.

6. There is no protective layer after waterproof construction. It is easy to damage the waterproof layer, and after the waterproof layer is done, it needs to be ventilated and dried in time to avoid stepping on it and avoiding scattering dust.

7. Do a closed water test before the waterproof layer is not dried and solidified. In the case that the waterproof layer is not dry and solid, the waterproof coating has not yet formed a good waterproof protective film, and in this case, the closed water test is easy to affect the waterproof layer to fall off, and the waterproof effect cannot be achieved.