Will putty stick to water-based paint?

Any finishing work involves surface preparation. This is especially important when it comes to repairs. It is then that a situation arises in which you have to remove the old coating from the walls. Most often this is wallpaper or various paints and varnishes. If everything is clear with the first option, then the second one causes a lot of difficulties. It is not always possible to completely remove a layer of paint, then a reasonable question arises: is it possible to putty over paint?

This question is not idle. The fact is that it is not always possible to remove the entire painted layer. There are always mistakes left. They can be removed, but then you will have to remove part of the coating. And this, in turn, leads to additional costs. And in general, will the putty layer stick then?

Preliminary surface study

Surfaces found in houses and apartments are usually coated with oil-based, water-based paints and enamels. Complete removal of such coating is not always necessary. The old layer can stick very well and not delaminate. Thus, before taking drastic measures, you need to check whether anything should be done. This can be understood if you resort to a simple test: run a well-wetted rag over the painted wall. What you can see:

The coating will begin to “wash off”. The marks will remain on the rag and the layers will begin to peel off. All these signs indicate one thing - water-based paint was used. It can be easily removed when exposed to water. If you put putty on it, the same thing will happen. Namely, the solution will simply fall off. The work will go down the drain. To put it simply, everything will have to be removed and redone. The worst thing is when this happens while wallpapering.
There may be another option. The surface will not react to exposure to water. This means that this is a paint based on drying oil or solvents. Such materials are not afraid of increased moisture. It's not scary to apply putty on them. Although here, not everything is so simple. The painted layer should adhere very well.

Removing paint

As already noted, water-based paint can be easily removed using water. After it is completely washed off, the surface needs to be thoroughly dried. The situation is different with oil solutions and enamels. There are several options that are used to remove such compounds. This:

Mechanical method To remove the coating, use special tools and electrical devices. This method requires a lot of physical strength. It leaves behind a lot of dust and dirt. For work, it is advisable to wear a respirator and safety glasses.
Chemical method Special chemical reagents are used. They are applied to the painted surface. Under their influence, the layer is destroyed. Work is performed in protective clothing, gloves and goggles.
Thermal method: A hair dryer is used. Under the jets of hot air, the paint begins to rise. It is easy to clean.

What do you need to get in the end? It's okay if some painted areas remain. The most important thing is to ensure that there is no peeling. The places where the old layer remains must be well cleaned and free of swelling and swelling. Then you can not be afraid and putty on the paint.

Ways to remove paint from a wall

Water-based paint can be easily removed from the wall by wetting it with water. And when the surface is completely cleared of paint, it requires time to dry completely. A completely different approach should be taken in the case of oil-based materials. This coating can be left if the composition holds tightly and does not threaten subsequent peeling.

However, when applying putty over oil-based paint is associated with certain risks, it is better to get rid of the old paint. There are several effective ways to do this.

There are several ways to remove old paint

Chemical

The chemical method of removing old paint coating involves the use of special reagents. They should be applied to problem areas. Under the influence of active substances, the layer of paint and varnish material is destroyed. After some time, the enamel softens and can be easily removed with a spatula. But since you have to deal with chemicals, the work must be done only in protective clothing. Also be sure to wear gloves and goggles.

Nothing bad will happen if painted areas remain on the wall. Even with their considerable size, the main thing is that the remaining areas do not peel off. That is, there should be no swelling or swelling in these places. Only in this case can you safely putty the painted walls.

The chemical method involves the use of removers and solvents

Thermal

The benefit of thermal exposure is due to the fact that the old enamel coating can soften during heating. For this purpose, a blowtorch or a hair dryer is used. The latter equipment is preferable and safer. Streams of hot air cause the paint to bubble and melt, after which it can be easily removed from the wall with a spatula.

The effectiveness of the thermal method is due to the property of the old paint layer to soften when heated

Mechanical

The coating is usually removed by hand with a spatula or iron brush. However, mechanical techniques, in turn, are varied due to the use of various special tools and electrical devices - grinders and other devices. It also requires a lot of physical strength. In addition, upon completion of work, a large amount of dirt and dust accumulates. Therefore, it is advisable to wear a respirator before the process, and also do not forget about safety glasses.

Mechanical cleaning is carried out using special tools

What to do if the paint cannot be removed

In cases where it is not possible to remove old paint, a special primer comes to the rescue. Such a means is concrete contact. The mixture contains microscopic particles, which ensure high adhesion of the putty to the wall surface. The filler is quartz sand. The liquid part of the primer penetrates deeply into the paint.

The main role of the concrete contact is to provide the treated surface with the required level of roughness in order to facilitate the application of putty.

Procedure for processing walls:

If there are cracks on the walls, they must be widened using a spatula. In other words, the layered coating, including the plaster layer underneath, is removed, revealing a solid base.
As work progresses, notches, even large ones, may appear. These defects must be smoothed out with a putty mixture, resting on the paint layer.
After preliminary application of concrete contact, the entire wall should be leveled.
It is also advisable to reinforce the surface with a plaster mesh, which makes further work easier. This is done after the wall has been primed and the composition has dried.

The presence of a special mesh is mandatory when the thickness of the plaster layer exceeds 10 mm.

It is necessary to choose a primer with the same base as the paintwork material

Surface preparation

Before you putty the walls and ceiling, they need to be prepared. Any surface requires thorough cleaning of paint, paint and dirt. If there are oil stains, they are removed using a soap solution. It is possible that when removing painted areas, the integrity of the coating was compromised. That is, potholes, cracks, and chips appeared. They need to be sealed.

It is important not to forget that there is always such an important stage as priming. Due to the fact that all surfaces that are coated with paint are very smooth, this process must not be forgotten. Only then can it be achieved that the adhesion of the putty mixture to the painted section of the wall will be as strong as possible. This will also give greater strength to the old coating. Any neglect will result in the solution peeling off. That is, the putty will not adhere to the paint.

Putty application and final finishing

Further work is no different from simply applying the solution to the walls and ceilings. The putty is easily applied to the paint. The resulting surface will hide traces of previous painting. If everything was done correctly, then there will be no problems.

The following nuances are taken into account:

Any major defects will be corrected after the base paint has been removed. Then the areas that were generated in this case are simultaneously closed.
The putty must be applied in thin layers. You cannot make them larger than those specified by the manufacturer. Especially when working on a painted surface.
If you notice that the mixture begins to lag behind areas of the wall on which paint remains, then most likely you need to reduce the thickness of the applied layer.
After the putty is applied to the paint, everything should dry thoroughly. Then it is coated with primer again.

In the photo - work with putty on a painted wall

Is it possible to putty on paint: water-based, oil-based?

Any finishing work involves surface preparation. This is especially important when it comes to repairs. It is then that a situation arises in which you have to remove the old coating from the walls.

Most often this is wallpaper or various paints and varnishes. If everything is clear with the first option, then the second one causes a lot of difficulties.

It is not always possible to completely remove a layer of paint, then a reasonable question arises: is it possible to putty over paint?

Preliminary surface study

Thus, before taking drastic measures, you need to check whether anything should be done. This can be understood if you resort to a simple test: run a well-wetted rag over the painted wall.

What you can see:

The coating will begin to “wash off”. The marks will remain on the rag and the layers will begin to peel off. All these signs indicate one thing - water-based paint was used. It can be easily removed when exposed to water. If you put putty on it, the same thing will happen. Namely, the solution will simply fall off. The work will go down the drain. To put it simply, everything will have to be removed and redone. The worst thing is when this happens while wallpapering.
There may be another option. The surface will not react to exposure to water. This means that this is a paint based on drying oil or solvents. Such materials are not afraid of increased moisture. It's not scary to apply putty on them. Although here, not everything is so simple. The painted layer should adhere very well.

To find out the type of paint that is applied to the surface, you need to run a well-wetted sponge over it

This was the simplest test option. But before starting work, you should also study the surfaces in other ways. To do this, you need to tap the ceiling and walls to achieve peeling of the poor-quality coating.

As an auxiliary tool, a special spatula is used, which was designed specifically for removing coloring materials. One of its sides is sharpened, which allows you to pry off bubbles and peeling edges.

Removing paint

Mechanical method To remove the coating, use special tools and electrical devices. This method requires a lot of physical strength. It leaves behind a lot of dust and dirt. For work, it is advisable to wear a respirator and safety glasses.
Chemical method Special chemical reagents are used. They are applied to the painted surface. Under their influence, the layer is destroyed. Work is performed in protective clothing, gloves and goggles.
Thermal method: A hair dryer is used. Under the jets of hot air, the paint begins to rise. It is easy to clean.

Putty application and final finishing

The following nuances are taken into account:

Any major defects will be corrected after the base paint has been removed. Then the areas that were generated in this case are simultaneously closed.
The putty must be applied in thin layers. You cannot make them larger than those specified by the manufacturer. Especially when working on a painted surface.
If you notice that the mixture begins to lag behind areas of the wall on which paint remains, then most likely you need to reduce the thickness of the applied layer.
After the putty is applied to the paint, everything should dry thoroughly. Then it is coated with primer again.

The putty should be applied in a thin layer and only after careful preparation of the painted wall.

There are a lot of people who are concerned about the question: is it possible to putty paint on walls? After all, sometimes it is quite difficult to clean a painted surface. The paint eats away so much that it can only be removed by destroying the structure itself. And many argue that this is the only way out. But in reality, it's not all that scary.

You can apply putty to paint, and you don’t have to be afraid of it. True, you should remove the old layer as much as possible. It is necessary to ensure that there are no peelings or swellings. For greater adhesion, non-removed areas are covered with scratches.

The only paint from which the surface needs to be completely cleaned is a water-based paint.

: the most practical way to prepare a painted wall for applying putty for tiling

Source: https://otdelkagid.ru/raboty/shpaklevka/mozhno-li-shpaklevat-po-kraske.html

How to putty

When working with a clean room, questions about old painting do not arise, but what to do when it comes to repairs, and we are faced with old painted walls? 10 out of 10 experts will answer that first you need to understand what kind of material is on the wall.

Putty on old paint is allowed in rare cases and if the surface is not painted with water-based emulsion. In addition, it is necessary to check how tightly the coating adheres to the base. To do this, it is enough to cause several mechanical damage to the painted wall and make sure how tightly the paint layer adheres to the base of the surface.

An old painted surface that falls apart due to mechanical damage

Regarding water emulsion

Naturally, the question immediately arises: is it possible to putty over water-based paint? We’ll answer right away – no! The fact is that the water emulsion will draw water out of the putty, and as soon as this process begins, everything will peel off from the wall, along with the layers of putty.

Important! It is necessary to immediately exclude the moment of filling with water emulsion. Regardless of the dry mixture, it will still flake off!

Paint with putty peels off very easily

One question always leads to another, because you need to understand what kind of paint is applied to the wall.

This is very easy to calculate:

Warm water is filled into the container.
A simple sponge is used to treat part of the painted wall.
You can rub a small space with a sponge, and if it foams, then it is a water emulsion.
After 15 minutes, using a spatula, the swollen part of the painted surface is calmly removed.

And in this case, the paint putty will simply be completely useless, since it will not be able to fulfill its functional duties and very soon it will simply fall off the walls.

Are all paints equally contraindicated for applying putty?

The next question, whether it is possible to put putty on paint, essentially stems from the fact that in addition to water-based emulsion, there are other types of paint and varnish materials.

And here there are some interesting points:

If the paint really shows excellent adhesion to the walls, then you can put putty on it.
The painted surface must be washed with soap or other detergent to prevent oil stains on the wall.
Notches are applied to the surface, they can be scratched directly with a spatula, or beaten with a hammer and chisel, this will be a kind of mesh.

Notches on the wall help with grip

After all, the wall is primed, this will give adhesion to the entire surface.

Important! This procedure is perfect for oil paint. But at the same time, the painted layer must be in good adhesion to the wall.

Work ban

Naturally, there are surfaces where paint putty is canceled in any case. There are several such conditions:

A loose base that falls off when pressed lightly.
Wet walls on which the paint has already swollen and started to “bubble”.
An easily removable layer of painted surface.

Is it possible to apply putty over old paint?

In old residential buildings, the walls and ceilings are painted. If it is necessary to carry out repair work, the question arises - what to do with the old coating? Should I leave it as is or completely clean all surfaces?

To answer the question whether it is possible to putty over old paint, you need to determine the type of paint coating. This will allow you to understand whether the putty mixture will stick to the wall or will soon fall off. To do this, the first step is to find out how firmly the old paint adheres to the surface. Each case has its own methodology.

Any professional painter will tell you that it's best not to put putty on old paint. At the same time, getting rid of such coating is sometimes extremely difficult, if not completely impossible.

Putty on old paint requires careful surface preparation

Water-based paint

Under no circumstances should you put putty on the walls if they are painted with water-based emulsion! This is explained by the fact that such paint is not considered waterproof. For this reason, the coloring composition will begin to draw out all the moisture from the putty. And as soon as the process begins, the old paint, in turn, begins to peel off from the walls. Moreover, it will disappear along with the putty.

Attention!
Experts recommend completely removing old water-based paint from the surface before starting puttying.

Oil paint

As for oil-based coloring materials, there are no direct contraindications. Putty can be applied to this paint. However, you must make sure that the coating adheres firmly to the wall. To do this, walk over the surface with a stiff metal brush or scratch it with a spatula. Anything that comes off must be removed.

Water-based paint

Oil paint

Conclusion

In conclusion, you can derive a simple formula for successful puttying and painting - everything needs to be done according to the rules, and the video in this article will clearly show how to accurately follow the basic principles of finishing and painting work (see also the article “Types of putties and features of their use”).

Almost any renovation begins with leveling the walls before their subsequent finishing. However, what to do if the surface has been painted? Is it possible to apply putty over paint or should I still clean the wall?

Study of surface properties

In order to find out whether putty can be applied to old paint, you should determine its type. There are several main varieties:

If, when the painted surface comes into contact with water, the paint begins to bubble and wash off, this means that the walls were covered with water-based paint. Can putty be applied to water-based paint? When exposed to moisture, the paint layer is destroyed and washed off, so the applied putty, which also contains water, simply will not stick.
If the surface is smooth and shiny, and does not react to contact with water, then this means that the walls are painted with drying oil or solvent-based paint. Can putty be applied to oil paint? There is no clear answer to this question. The fact is that putty can be applied to old paint that still holds, but if chips, cracks and blisters are visible on the coating, then the surface of the wall will have to be cleaned.

Putty for water-based paint

Questions related to plastering, priming and painting work. Issues related to the preparation of surfaces for finishing are also discussed.

Return to “Surface preparation. We plaster, prime, paint.”

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Vadim Messages: 730 Registered: 15 Feb 2012, 12:58

Post by Vadim » May 24, 2012, 06:11

We are making repairs in classrooms, the walls of which were built by the construction battalion; naturally, they are not level. The walls are covered with water-based paint, the question is whether it is possible to somehow treat them so that the paint is not removed, but putty is applied directly to the paint. super_stroitel Messages: 890 Registered: February 25, 2012, 21:41

Re: Putty for water-based paint

Post by super_stroitel » May 26, 2012, 8:22 pm

If the previous putty and paint hold up well, then you can treat it with any deeply penetrating primer. Places where paint or putty does not adhere must be knocked down, primed and puttied again. Alina Messages: 252 Registered: 20 Feb 2012, 18:24

Post by Alina » May 28, 2012, 10:58

I think this will be a lot of problems! You will at least need to peel off the paint - for this you will need a hair dryer and a spatula. In most cases, this paint comes off without problems. If the walls are not treated and primed before puttying, the starting or finishing putty will begin to crumble and mold.Candamar

Post byCandamar » Jun 05, 2012 12:34 pm

You don't have to remove the paint. The main thing is to remove it from those places where it peels off with a spatula or a metal brush. Then go through Betokontakt and dry well (at least 24 hours). This preparation will be sufficient for puttying. Nothing will definitely fall off.melnik7771Messages: 9 Registered: 03 Nov 2012, 11:21

Posted bymelnik7771 » Nov 22, 2012, 12:32 pm

It is necessary to reduce the gloss with a large tungsten mesh. The weak points identified at the same time should be torn off. Prime everything. We putty, and immediately, before the putty has dried, we embed the nylon mesh into it. The mesh is sold in construction stores and has a width of 1 meter. After this, you can apply any layer of putty. Semen_2012 Messages: 9 Registered: 03 Dec 2012, 22:18

Post by Semen_2012 » Dec 03, 2012, 10:29 pm

What is the gloss on water-based paint?! They tell you correctly: prime and you won’t have any troubles. If the paint holds up well, then after priming it will lay down normally and anything will go on top.natalishoklovaMessages: 15 Registered: November 14, 2012, 07:52 pm

Post bynatalishoklova » Jan 10, 2013, 4:11 pm

It’s possible, but you just need to prime it and go over it a little at least superficially with a spatula. but not necessarily, the main thing is the primer, and putty, but after puttingty, be sure to prime the wall. Tomasss Posts: 93 Registered: Nov 14, 2012, 11:36 am

Post by Tomasss » 09 Mar 2013, 07:09

I would advise you to first find out whether the paint is moisture resistant or not, if it is moisture resistant then you can putty and don’t be afraid, well, of course, in compliance with all technologies, you can check this by wetting the walls, if the paint does not bubble then everything is fine. serenada Messages: 109 Registered: 18 Feb 2012, 09 :54

Posted byserenada » April 25, 2013, 05:37

To ensure high-quality performance of new finishing work, it is recommended to remove the old layer of water-based paint. To do this, you need to wet the walls with a sponge or rag, wait for it to swell and remove it with a spatula. After removing the old paint, the wall should be primed.

Putty for acrylic paint

Acrylic is not as popular as the types of paints described above. However, it is also used for wall decoration. Can putty be applied to acrylic paint? Acrylic-based pigment is as durable as its oil-based counterparts.

To ensure good adhesion to the smooth surface of the painted wall, apply a layer of primer with fine abrasive particles. They will penetrate into the pores and irregularities in the paint, thereby creating an optimal rough surface for good adhesion to subsequent putty.

Acrylic paint

The most common option is a wall painted with acrylic paint. As a rule, such a cake consists of putty, cobwebs, another layer of putty mixture and two layers of acrylic. Please note that most putties have an acrylic base, hence many conclude that a fresh layer of the mixture can be applied to the wall immediately, without preparing the surface. This is mistake #1.

The problem is that the painted wall absorbs moisture well, so a fresh layer of the mixture will dry quickly and will not adhere to the surface. Our task is to reduce the absorption of the wall. For this, primer Condor, Ceresit and analogues are used. The operating algorithm is as follows:

Testing acrylic for strength
Apply 1-2 layers of primer,
Apply putty.

If the old paint does not adhere well, then the wall will have to be cleaned with a spatula or abrasive. It’s easy to check the quality of the paint - make a cut on the wall with the angle of a metal spatula, if the paint does not start to crumble, then feel free to prime the wall and putty. If the acrylic crumbles, then there is an extra step in the work:

Old acrylic is cleaned off,
The wall is primed
Apply a new layer of putty.

The optimal way to clean the wall is to use a metal spatula from 20 cm long - it removes the paint on all problem areas. In those places where the composition holds well, there is no point in removing it!

The primer is applied with a roller in 1-2 layers. The number of layers depends on the absorption of the wall. Apply the first layer, wait 4-6 hours and check the absorption of the wall; if it still absorbs moisture well, then prime twice.

The putty is applied 6-12 hours after applying the last coat of primer.

How to remove old paint

In most cases, the old coating must be removed. You can do this in several ways:

Water-based paint is thoroughly washed off with water, after which the wall surface must be thoroughly dried before applying putty or other finishing materials.
Oil paint is removed mechanically. It involves scraping the surface using special tools. This method takes a lot of time and leaves a lot of dust and dirt. It is recommended to use personal protective equipment - goggles and a respirator.
The chemical method is the use of special reagents that destroy the paint layer. Substances that can harm humans are often used, so it is recommended that all manipulations be carried out with gloves, goggles and a respirator.
The thermal method involves heating the paint surface with a hair dryer. As a result, the coating will begin to separate from the walls, and it will be quite easy to clean it off with a spatula and other tools.

Removing paint

Mechanical method To remove the coating, use special tools and electrical devices. This method requires a lot of physical strength. It leaves behind a lot of dust and dirt. For work, it is advisable to wear a respirator and safety glasses.
Chemical method Special chemical reagents are used. They are applied to the painted surface. Under their influence, the layer is destroyed. Work is performed in protective clothing, gloves and goggles.
Thermal method: A hair dryer is used. Under the jets of hot air, the paint begins to rise. It is easy to clean.

Materials and tools

Can putty be applied to paint? It’s possible, but it’s important to choose the right building materials and tools:

Finishing paint work is carried out with finishing putty, which has a fine fraction and is applied in a thin layer. This is necessary in order to obtain a perfectly flat and smooth wall surface.
It is recommended to use gypsum or acrylic putty. It meets all the necessary requirements.
To mix the composition, you may need a plastic bucket and a drill with a mixer attachment.
Coarse sandpaper is used to sand the wall surface.
A small spatula is needed to scrape off paint that is unstable on the wall surface.
A large spatula will be needed to apply layers of putty.

Surface preparation

The surface, cleared of old paint, must be prepared for applying putty. To do this, you should inspect the wall for dirty stains that need to be washed off. Then the surface must be primed to ensure good adhesion of the putty to the wall.

If you cannot get rid of the paint, you should use the following methods:

A smooth painted surface does not adhere well to putty, so you should make notches on the wall using a knife or other sharp tool.
In some cases, builders recommend cleaning the surface with a wire brush or sandpaper to create roughness.

Any of the chosen methods guarantees a good result.

Preparing painted walls

Walls coated with oil paint do not breathe and adhere poorly to the putty. In this regard, they are being prepared for finishing.

If part of the paint layer has been removed, and the surface of the wall is covered with potholes and deep scratches, then they are puttied before priming, and when dry, they are sanded with sandpaper.

A mesh of notches is also applied to the surface - scratched with a spatula or chisel to achieve a rough surface.

But to avoid unnecessary problems, it is better to get rid of the paint as much as possible.

3 removal methods: thermal, chemical or mechanical. The first involves the use of removers and solvents. They soften the enamel layer, making it easy to remove with a spatula. This method ensures reliable ventilation.

Thermal speaks for itself: heating the paint with a hair dryer or blowtorch. The method is effective. The paint is quickly removed with light movements of the spatula.

Removing paint mechanically

The mechanical method is based on working with a grinding machine, a drill with an attachment, sandpaper and a spatula.

After the surface is ready, primer and putty are performed.

Application of primer

Using a primer to obtain a high-quality result is simply necessary. It must be applied to the wall surface before starting puttying. It can also secure a layer of putty.

Experienced builders recommend using a quartz primer, which has large fractions of mineral inclusions in order to create an ideal surface for attaching putty to the wall. The finishing primer, which is applied to the putty before subsequent finishing, is used with smaller fractions so as not to stand out too much against the background of a smooth wall.

Puttying on paint

Can finishing putty be applied to paint? This type of finishing work is acceptable, but you should adhere to these recommendations:

When preparing the surface for puttying, it is necessary to clean the wall from dirt and dust, as well as sand the surface that could not be cleared of paint.
The thickness of the layers of putty applied should be minimal. This is also indicated by the manufacturer on the label.
It is recommended to apply a layer of primer before applying putty.
If in some place it begins to lag behind the paint, this means either a poorly prepared surface or a too thick layer of the applied material.
It is important to pay sufficient attention to drying the mixture before continuing finishing work.
After finishing the puttying, you need to coat the surface again with a primer.

Auto putty

Putty is also used in car repairs. Of course, this is far from the same material that is used to putty on walls, but the same question still arises: is it possible to apply putty to the paint of a car? This is absolutely not worth doing; such a structure will not hold up and will fall off immediately after drying. It is important to remove the paint layer from the car and strip the area down to bare metal. Only after this is the car ready to apply putty.