Is it possible to paint with alkyd after acrylic enamel? The right combination of materials. Basic rules for working with varnish

Repairing painted surfaces is an inevitable process. Even if the previous finishing was done correctly and quality materials.

Before repainting the walls, you need to make sure that the new and old coating will be compatible.

At the moment, there are many ways to remove old paint.

• mechanical methods. Acrylic enamel and acrylic paint or other coating peel off sharp objects or a power tool, such as a drill with a nozzle.
• thermal methods. In this case, the paint softens, for example, building hair dryer and then removed.
• Chemical methods. The finish is removed with a variety of washes.

However, the process of removing the old coating is long and labor-intensive. Yes, and the price of the issue is quite high, especially if you need to remove paint from large area or complex surfaces. Based on this, many of us prefer to apply new finish directly on the old one. In this case, the question of the compatibility of coatings often arises.

In this article we will talk about whether acrylic paint can be applied to enamel and vice versa. But first, let's look at the basic concepts.

Varieties of paints and varnishes

Part paintwork materials includes binder, fillers, pigments, solvents/thinners and additives. In order to correctly apply paintwork materials during repairs, you need to know exactly their composition.

Main Components

Oil paints based on drying oil.

All paints are divided according to the type of binder used and the type of solvent.

1. The binder determines the main qualities of the paint, the service life of the coating and the speed of its drying.. There are 4 types of binders used for paintwork materials: alkyd and epoxy resins, oil (on drying oil), latex, acrylic polymers.
2. Solvent components are divided into actual solvents and diluents.. The former reduce the fluidity and viscosity of the material. Thinners only reduce the viscosity of the paint.
3. To improve the characteristics of paintwork materials, additives are added to their composition.: stabilizers, emulsifiers, fungicides, antiseptics, etc.
4. A separate category includes special paints . it anti-corrosion coatings, for example, electrically conductive paint Zinga. Analogs with antiseptic properties protecting the base from mold and decay. Compositions for removing small defects (irregularities, scratches, cracks), etc.

Oil and enamel formulations

On the picture acrylic enamel.

To materials based on alkyd and acrylic resins include oil and enamel paints. They are suitable for painting metal, wood and plastered surfaces.

After drying, it is non-toxic, light and moisture resistant.

1. Oil paints are produced on the basis of drying oil. As thinners for them are White Spirit, gasoline, turpentine or solvent naphtha. The price of the compositions is low, but they dry for a long time (up to several days). The main disadvantage is that over time the coating turns yellow.
2. AT enamel compounds, as a binder, varnish is added. It gives the coating gloss and aesthetics. The instruction recommends using such paints for external and internal finishing works for metal, wood, concrete, plaster. Enamels are moisture and light resistant. They also have anti-corrosion resistance.

Emulsion and dispersion materials

Water-dispersion composition.

Such paints are diluted, but do not dissolve with water. In them, the binder and pigment particles are distributed in a liquid medium, thus creating a stable emulsion.

When the coating dries, it does not wash out with water.

1. Emulsion compositions are economical, have environmental friendliness and fire safety.
2. They fit well on almost any substrate.
3. Dries quickly, does not have a strong smell.

Many people think that water-based and water-dispersion formulations are the same.

However, they are different.

1. Matte emulsions are washed off over time. The dispersions are water-resistant and suitable for use in wet rooms.
2. Water-dispersion compositions are usually white, water-based analogues have a variety of color palettes.
3. Dispersions cannot be used at temperatures below +5 degrees. However, when modifiers are added, they are thermally stable. Such, for example, fire-retardant paints for metal Polistil.

Note!
The best analogues from paints diluted with water - based on acrylic resins and polymers.
They have high elasticity and strength.

1. Such compositions are frost-resistant after their complete drying.
2. Possess vapor permeability.
3. Suitable for alkaline substrates (concrete, plaster).
4. These paints are well tinted.
5. Resistant to ultraviolet, retain the original color for a long time.
6. They have the ability to repel water.
7. They have high mechanical stability.

About paint compatibility

First, an epoxy putty must be applied to the old coating.

Based on everything written above, we will answer main question articles - is it possible to paint on enamel with acrylic paint and vice versa.

1. Based on their composition, acrylic coatings fall only on the same old coating. They cannot be applied over alkyd enamels due to thinner/solvent incompatibility. The new coating will simply fold (raise) the enamel.
2. In addition, it is undesirable to apply emulsion and dispersion compositions on old glossy and adhesive paints. The same applies to lacquered bases.
3. But, after emulsion and dispersion materials, any enamels and paints can be used.

Now about how, without removing the enamel, apply a do-it-yourself coating of acrylic paint.

Note!
To do this, you need to create an intermediate layer, in a stable state, resistant to both acrylic and organic solvents.
It should consist of polyesters, (for example, epoxy resin, polyurethane) on amine hardeners.
Such compounds are dissolved with acetone.

After putty is applied acrylic primer.

Now many liquid putties and primers are sold that have the described composition.

One of the best materials is "Inter Troton Spray".

1. First, apply liquid putty over the enamel.
2. Next, cover the surface with acrylic primer.
   
3. Then you can paint the base.

Conclusion

If you are unable to withdraw old paint, then a new coating can be applied to it. However, there are nuances here. Some types of coatings are incompatible, so between them you need to create an intermediate layer of neutral compositions. By watching the video in this article, you will expand your knowledge base.

Correct combinations materials. The difference between acrylic and alkyd enamels and general recommendations by application.

Properties of one-component acrylic enamels

Unlike acrylic emulsions in jars, aerosol acrylic enamels are not water-based, but organic.

Advantages (compared to alkyd spray enamels):

• high drying speed;
• saturated colors;
• high elasticity and high adhesion to plastics (due to these properties, acrylic enamels are preferable for application to plastic surfaces).

Disadvantages (compared to alkyd spray enamels):

• moderate weather resistance;
• moderate adhesion to metals (preliminary priming is required);
• moderate solvent resistance.

Properties of one-component alkyd enamels

The peculiarity of alkyd enamels compared to acrylic ones is that after drying, the chemical processes in them do not end. After the solvent has evaporated, alkyd enamel under the influence of atmospheric oxygen, the polymerization process continues. The molecules “crosslink” with each other and, figuratively speaking, form one large molecule, making the coating more durable and resistant to various influences, but at the same time less elastic and more brittle. However, alkyds have been discovered for a very long time and are very well studied. Modern KUDO formulations take this fact into account, and even after complete polymerization, the paint film remains quite elastic. The polymerization process can last from several days to two weeks. During polymerization, the coating must not be subjected to mechanical stress. For example, an element of an automobile body painted with alkyd enamel cannot be washed and polished for two weeks. Also, during polymerization, alkyd enamel cannot be topcoated with other paints and varnishes, even on an alkyd basis - the coating may be damaged. It is necessary to cover either “wet on wet”, that is, apply the next coating immediately after drying “to the touch”, or after waiting for complete polymerization.

Advantages (compared to acrylic spray enamels):

• high adhesion to metals;
• higher hardness;
• higher weather resistance;
• higher light resistance (less fade);
• higher solvent resistance.

Disadvantages (compared to acrylic spray enamels):

• more long time drying;
• long polymerization process.

Table of correct combinations

* Intermediate drying time between coats, dry-to-touch time, full dry time and time for the base to gain full mechanical strength indicated in the instructions for use of each specific product.

** We recommend using the color of the primer as close as possible to the color of the enamel.
If the acrylic base is brightly colored, then when a thick layer of alkyd coating is applied to it (especially light colors), the bright pigment of the base may “rise”. The same is possible when applying an alkyd coating on an alkyd base "wet on wet".
For example, if a brown-red acrylic primer is painted with white alkyd enamel, then there is a good chance of getting a pink finish.

How to apply an acrylic coating on an acrylic base.

Acrylic coating can be applied to the acrylic base, waiting for the base to dry “to the touch”.
You can also apply the coating after the base has completely dried.

How to apply an alkyd coating on an acrylic base.

An alkyd coating can be applied over an acrylic base, waiting for the base to dry to the touch.
You can also apply the coating after the base has completely dried.
Attention! Do not apply aclide-urethane coatings, in particular yacht varnish, to one-component acrylic primer - the base may swell.

How to apply an acrylic coating on an alkyd base.

The alkyd base must not be covered with paints and varnishes during its polymerization - the alkyd base may swell.
It is necessary to apply an acrylic coating on an alkyd base either “wet on wet”, that is, immediately after the base has dried “to touch” (no later than 1.5 hours after applying the base), or after waiting for complete polymerization, when the coating gains full strength.
When applied “wet on wet”, the adhesion of the applied layer will be higher than when applied after full cure.

How to apply an alkyd coating on an alkyd base.

The alkyd base must not be coated with paints and varnishes during its polymerization - the alkyd base can swell even if the same composition is applied as in the base.
It is necessary to apply an alkyd coating on an alkyd base either “wet on wet”, that is, immediately after the base has dried “to the touch” (no later than 1.5 hours after applying the base), or after waiting for complete polymerization, when the coating gains full strength.
When applied “wet on wet”, the adhesion of the applied layer will be higher than when applied after full cure.

Intermediate drying time between coats, dry-to-touch time, full dry time and time for the base to gain full mechanical strength are indicated in the instructions for use of each specific product.

When it comes to painting the surface in a renovation, the obvious question comes to mind: what paint to choose? Surely the color scheme has already been chosen in accordance with the design, so the essence of the question is what type of paintwork material to choose for application. Popular options are alkyd and acrylic paints. Despite their similar names, they differ significantly in both composition and characteristics. What are alkyd and acrylic paints and what advantages or disadvantages they have - this will be discussed in this text.

What are alkyd and acrylic paints made of, what are the differences

Let's get to the analysis of the composition of these two types of paint. The main component of alkyd formulations is alkyd varnish, which is mixed with different fillers, as well as a solvent. The most commonly used pentaphthalic alkyd varnish, which is a very thick resin, to which rosin, glycerin and vegetable oils are added.

The role of the solvent is most often assigned to purified kerosene or, in a simple way, white spirit. It perfectly copes with the splitting of fractions of fats, oils and various organic compounds therefore excellent for thinning alkyd paints. For fillers of alkyd enamels, marble or granite chips are used because of their high dispersion index.

Coloring pigments are added to this composition, giving the enamel a certain color shade. Quite often, some additional additives are included in the composition that can add functionality to the enamel, for example, an antiseptic to prevent the formation of fungus on a wooden surface.

The basis of acrylic paint is an acrylic polymer emulsion, with which the color pigment is mixed. This emulsion, also known as plexiglass, is the binder. The solvent, unlike alkyd enamels, is water. The composition also uses additives that change the properties of the material, for example, improving viscosity and application to the surface or increasing the drying rate.

Features of the use of alkyd paints

Despite the difference in composition, both types of compositions can be called universal. However, let us turn our attention to the use of alkyd-based paints. They can be used for any type of work - outdoor and indoor, due to their high mechanical properties, saturation and brightness.

These paints are classified into two main groups - directly enamels and oil paints. The latter are considered a separate type of paints and varnishes, but for the most part they contain alkyd resins, so they can be considered a type of alkyd paint.

Alkyd enamels are widely used in construction and decoration, because they are both glossy and matte. There are even semi-gloss compositions. The film formed by glossy enamels is resistant to abrasion and can be used both for application on wooden surfaces, and metal, in order to protect them. Glossy enamel lies more evenly on the surface and gets dirty a little worse than matte ones.

The choice of matte alkyd enamel is based more on the taste of the buyer, because according to operational properties they are not glossy. If you do not like the glare from the painted surface, then matte alkyd enamel will suit you better. These surfaces are slightly more prone to dirt, but this is not a problem, because any alkyd paint is resistant to strong detergents and cleans up well.

Comparison by basic properties

Drying paint. The film obtained after applying alkyd enamel dries quickly enough than acrylic film. After a few days, the alkyd film can properly perform its functions - both protective and decorative. For acrylic materials, the period of complete film formation takes a week or even more, and all this time the surface must be protected from mechanical stress.

Durability. Lifetime advantages on the acrylic side. Intense impact external environment leads to the fact that alkyd surfaces have to be renewed after a year. At the same time, if all the rules of preparation and application were followed, then the acrylic coating can last up to 8 years without the need for repainting.

More UV resistant acrylic materials. Unlike alkyd compounds, they do not fade and generally do not change the properties of the surface film.

Acrylic paints are also more resistant to mechanical stress, which in a way compensates for the longer preparation for the use of such coatings than alkyd enamels.

While acrylic is a more durable and resistant material, alkyd-based formulations have a wider range of colors and shades, and after application, the colors look much more vibrant.

Advantages and disadvantages of paints

Alkyd enamels are distinguished by these advantages:

• More low price and ease of application, which is especially important when choosing a material for large areas staining.
• Alkyd compounds have a large selection of shades, and the paint itself will not lose its color when dried.
• They dry quickly, and the protective characteristics appear within a couple of days.
• Alkyd enamels perfectly protect metal surfaces from rust and corrosion, and the film formed after application protects the surface well from aggressive cleaning agents such as bleach or whiteness.

Alkyd compounds also have the following disadvantages:

• In the long term, they do not have great reliability, the surface will turn yellow and crack over time, so that the paint will have to be renewed annually.
• Alkyd paints contain unsafe chemical components that cause bad smell that appear when dry.

At the same time, acrylic paints have their own competitive advantages.

• Long service life and increased resistance to external stimuli, which will retain excellent performance properties.
• A good option for indoor use, because there is no odor or harmful substances.
• A good opportunity for use even with the most high temperatures heating surfaces – e.g. for heating pipes.

Disadvantages of acrylic formulations:

• The cost of such paints will be higher, and the selection is really quality composition- harder. Its protective characteristics acrylic surfaces take longer - from several weeks to a month.

Compatibility of alkyd and acrylic materials

Sometimes you can meet the question, is it possible to use acrylic paints for repainting alkyd surfaces? Or vice versa, is it possible to apply alkyd-based compositions over acrylic? There is only one answer - it is not recommended. And there is no difference what kind of surface we are talking about, metal or wood.

The exact composition of any paintwork material cannot be fully known. The application of acrylic enamels over alkyd may result in the fact that the active components of the latter may come through upper layer in the form of dark spots and streaks, thereby spoiling the entire surface. Otherwise, alkyd paint simply may not adhere to the acrylic surface, as a result of which it will gradually peel off the surface.

However, if a significant period of operation of the painted surface has already passed and volatile elements have weathered from its surface, then there is the possibility of applying materials to each other. However, it’s still not worth doing on a “bare” surface, it is required Preliminary processing primer. Important point- The primer must be the same type as the paint you will be reapplying.

Production of alkyd and acrylic compounds

Even though the trend in manufacturing is to produce environmentally friendly clean materials, which are diluted with water, namely acrylic compositions, the main component produced by domestic factories are alkyd binders of paints and varnishes. To be precise, more than 65% of the entire paint and varnish production is occupied by alkyd materials.

It is worth noting that foreign companies are conducting much more active research polymer compounds, which are the basis for acrylic paints, as well as additives to these compounds. New technologies are being developed, the main focus of which is on environmental friendliness. In this regard, acrylic products are more attractive in terms of use. However, the price of such a product is much higher, which ultimately greatly affects the choice of the consumer.

In summary, alkyd-based paints are a very attractive choice - they are inexpensive, bright, dry quickly and have good durability. However, in the long run, acrylic enamels have the advantage of being less toxic and can last for decades.

Alkyd and acrylic paints are among the most common types of paint when it comes to serious painting works: wall painting, metal products etc. Perhaps due to the similarity of the name, they are often confused. Do these types of paints really have something in common?

In fact, the only similarity is that both are paints. Their composition is completely different.

Alkyd type can be called a more modernized version of oil paints. They are characterized by a similar mechanism of hardening and the formation of a surface film (which, by the way, is somewhat stronger, but less elastic). Alkyd paints consist of polyhydric alcohols (for example, glycerin) in combination with orthophthalic acid. Actually, the word "alkyd" comes from a combination of the words "alcohol" (alcohol) and "acid" (acid).

Unlike alkyd paints, acrylic paints are made on the basis of acrylic, a polymer better known as plexiglass. The composition of paints may include various additional components designed to improve certain properties (add elasticity, speed up drying).

• Life time. In acrylic paint, unlike alkyd, the surface retains its original appearance much longer. It is advisable to renew alkyd paint about once a year, since oxygen and ultraviolet intensely destroy surface layer paints. Acrylic coating, subject to the technology of surface preparation and paint application, can last from 8 (wood) to 20 (plaster) years.
• UV resistant. Acrylic practically does not change the properties of the surface film under the influence of sun rays, that is, it does not fade, does not turn yellow and does not take on a “matte” look. Alkyd compounds in this regard are not so reliable.
• Drying process. But the alkyd film dries relatively quickly, and after a couple of days it fully performs its protective and decorative functions. Acrylic film finishes its formation in about a month after application to the surface. In this case, the coating should be protected from mechanical influences until it is completely dry.
• Mechanical stability. The longer process of acrylic film formation is compensated by more high level resistance to mechanical influences(deformations, scratches).
• decorative properties. Alkyd compositions are distinguished by a more diverse range of shades and halftones, as well as, in general, more bright colors. On the other hand, acrylic paint lasts longer and does not require regular renewal.

Can alkyd compounds be applied to acrylic or vice versa? Neither is recommended, especially if the base has been painted relatively recently or if it is a metal surface. The fact is that the specific composition of the paints may not be completely clear to us. Alkyd compounds may contain components that will show through the layer of acrylic paint as dark spots. If alkyd paint is applied over acrylic, then it may not be fixed on it, that is, it may peel off.

The only option for applying such paints to each other: applying to the old coating, from which all volatile components have already disappeared. However, even in this case, the top coat of paint should be applied only after the surface has been treated with a primer of the same type (i.e. acrylic paint on acrylic primer and vice versa).

Alkyd and acrylic paints are among the most common types of paints when it comes to serious painting jobs: painting walls, metal work, etc. Perhaps due to the similarity of the name, they are often confused. Do these types of paints really have something in common?

Compound

In fact, the only similarity is that both are paints. Their composition is completely different.

Alkyd type can be called a more modernized version of oil paints. They are characterized by a similar mechanism of hardening and the formation of a surface film (which, by the way, is somewhat stronger, but less elastic). Alkyd paints consist of polyhydric alcohols (for example, glycerin) in combination with orthophthalic acid. Actually, the word "alkyd" comes from a combination of the words "alcohol" (alcohol) and "acid" (acid).

Unlike alkyd paints, acrylic paints are made on the basis of acrylic, a polymer better known as plexiglass. The composition of paints may include various additional components designed to improve certain properties (add elasticity, speed up drying).

Basic properties

• Life time. In acrylic paint, unlike alkyd, the surface retains its original appearance much longer. It is advisable to renew alkyd paint about once a year, since oxygen and ultraviolet intensely destroy the surface layer of paint. Acrylic coating, subject to the technology of surface preparation and paint application, can last from 8 (wood) to 20 (plaster) years.
• UV resistant. Acrylic practically does not change the properties of the surface film under the influence of sunlight, that is, it does not fade, does not turn yellow and does not acquire a “matte” appearance. Alkyd compounds in this regard are not so reliable.
• Drying process. But the alkyd film dries relatively quickly, and after a couple of days it fully performs its protective and decorative functions. Acrylic film finishes its formation in about a month after application to the surface. In this case, the coating should be protected from mechanical influences until it is completely dry.
• Mechanical stability. The longer process of forming an acrylic film is compensated by a higher level of resistance to mechanical stress (deformations, scratches).
• decorative properties.

  8. Can acrylic paint be applied to alkyd and vice versa?

  Alkyd compositions are distinguished by a more diverse range of shades and halftones, as well as generally brighter colors. On the other hand, acrylic paint lasts longer and does not require regular renewal.

Are acrylic and alkyd paints compatible?

Can alkyd compounds be applied to acrylic or vice versa? Neither is recommended, especially if the base has been painted relatively recently or if it is a metal surface. The fact is that the specific composition of the paints may not be completely clear to us. Alkyd compounds may contain components that will show through the layer of acrylic paint as dark spots. If alkyd paint is applied over acrylic, then it may not be fixed on it, that is, it may peel off.

The only option for applying such paints to each other: applying to the old coating, from which all volatile components have already disappeared. However, even in this case, the top coat of paint should be applied only after the surface has been treated with a primer of the same type (i.e. acrylic paint on acrylic primer and vice versa).

Acrylic paints and oily look used for finishing surfaces from the outside, as well as inside. In some cases, it is necessary to cover with acrylic a surface that has been painted with oil paint. To find out if one paint can be coated with another, it is necessary to consider the properties of each material.

Oil paint

Some time ago, oil paints were actively used to finish surfaces from the inside and outside. But they were replaced by a new, more versatile material, acrylic paints.
oil material made on the basis of drying oil or a similar agent, which is mixed with pigments mineral type. The paint is obtained by grinding all the components to a homogeneous composition. AT modern renovation oil paint is used very rarely. But in some cases it is advisable to use it as an economy for staining. large rooms, as its cost is lower than other materials. The main advantage of oil-based paints is their low cost. Such materials are resistant to moisture, oils have reliable protection wooden, and concrete materials. Oil-based paints also prevent rust on metal surfaces.
Such material has its drawbacks, which is why it is not very convenient to work with paint. There are not too many colors, almost a dozen, so it is difficult to make a certain design and give originality to the surface.
Also, the paint needs to be updated annually, that is, it wears out quickly, it takes additional expenses. If the surface is not updated in a timely manner, the material may peel off. big chunks. Appears during application strong smell Therefore, work is carried out in a well-ventilated area. When dry, the surface releases toxic elements, so it's best not to spend time in a painted room. The negative quality is long term drying of such material, almost two days.
Acrylic paint can be applied to an oily surface, it will not be difficult.

Acrylic type paints

Compared to oil formulations, acrylic paints have clear advantages. Acrylic compositions are environmentally friendly, do not emit toxic substances, since they do not contain solvents of organic origin.
The basis of this material is water, due to this, when applied, there is practically no smell. Also the material is different large quantity colors, and shades, this allows you to make the surface original. The desired color can be ordered from hardware store and it will be done on the spot. Acrylic composition has a high resistance to moisture, ultraviolet rays, and temperature changes, and also has good vapor permeability. Thus, acrylic paint is used for interior and exterior decoration. The painted surface dries quickly, in just a couple of hours. If we compare paints based on oil and acrylic, then the latter are considered more durable and resistant to wear. Such compositions are considered universal, and are used to create a different interior.

Can you paint with acrylic paint over oil paint?

Usually, experts do not recommend applying acrylic paint to an oil coating that is too old, as the materials do not adhere well to each other. But such work is allowed provided that the surface is thoroughly prepared. Work on surface preparation begins with grinding the previous coating, for this, sandpaper with fine grit is used.
After grinding, the surface is thoroughly cleaned of dirt, and the dust that has formed as a result of work, for this you can use a vacuum cleaner. Then the surface is degreased and left to dry. The dry surface is covered with 2 layers of acrylic-based mortar. But careful preparatory work don't talk about quality application acrylic paint on an oil surface. To get the result, it is necessary to use a thick acrylic composition, when diluted with water, the proportions should not exceed 1 to 1.
If a spray gun is used as the application tool, a suitable thinner must be added. The gloss or dullness of the surface depends on the type of this substance. Sometimes oil paint is very etched into the surface, especially if it is used for too long, then it cannot be removed. At the same time, special paints are used, which are distinguished by high adhesion, they are able to qualitatively paint even too oily surfaces.

The technology of applying acrylic paint by oil composition

1. First, the surface is polished, all dust is removed, for this a vacuum cleaner is used.
2. Then processing is performed primer composition. And leave it to dry completely.
3. The acrylic composition is applied with a brush or spray gun, in the latter case, special thinners are used.
4. Begin to apply paint from the corners of the surface to the middle or from top to bottom. After fully covering the walls or ceiling, leave time to dry, usually a couple of hours, there are paints that dry faster.

Basic rules for applying acrylic paint to an oil composition

1. To ensure a quality painted surface, it must be well prepared. The main oil layer of the paint is removed by grinding, and then the dust is removed.
2. All contaminants must be cleaned so that the acrylic composition lays down in an even layer.

   The difference between alkyd paint and acrylic

3. In too advanced cases. If the oil has eaten into a wooden or other surface, use special paints with a high adhesion rate.
4. Surface grinding can be done sandpaper with fine grain or special grinder. In some cases, a drill and a special nozzle are used, it is necessary to act carefully so as not to damage the surface.
5. Obligatory action is degreasing, otherwise new composition will not adhere well to the original surface.
6. To ensure high-quality adhesion of the paint to the previous surface, the acrylic composition must have a thick consistency.

When choosing a paint composition, it is necessary to study its properties, all positive and negative qualities, since the service life of the coating and its reliability depend on it. Before purchasing the material, it is necessary to consider what kind of coloring will be produced, primary or secondary. In the second option, the surface is covered, which has already been previously treated with other compositions.

It is especially taken into account when the walls are painted with oil paint, these are the consequences of old repairs. Usually oil paint used for kitchen facilities or bathrooms. When choosing modern paint based on acrylic, you need to figure out how to deal with the previous finish, namely oil composition. This article describes all the advantages and disadvantages of oil and acrylic paints.

Usually cover oil paint acrylic composition not recommended, but it is possible if you resort to careful preparation surfaces. The former material is partially scraped off by grinding with sandpaper, primed, and covered with acrylic paint.

Alkyd primer and acrylic paint

The primer is applied to the surface before it is painted in order to protect the surface and improve the adhesion of the paint to be applied over the primer. The deeper the primer penetrates into the surface to be treated, the better the paint will adhere to it later. A primer for metal, for example, is a prerequisite for high-quality painting of metal surfaces.

When applied, the primer fills the pores of the surface and binds small particles of foreign matter (such as dust), thereby preparing it for applying paint or other paints and varnishes.

What is the difference between alkyd paint and acrylic paint

Any soil, whether acrylic primer under wallpaper or primer composition for metal, can significantly reduce the consumption of expensive materials. Savings are especially noticeable when priming large areas.

Another advantage of using a primer is that the primer slows down the penetration of substances from the composition of the next layer, which helps to evenly dry the surface to be painted. Uniform drying, in turn, improves the quality of painting, eliminating cracks and warpage on the treated surface.

Currently, compositions of this type, whether it is a water-dispersion primer or a primer deep penetration, are indispensable materials for internal or external repairs of residential buildings and industrial premises. There are many types of primer coatings (acrylic primer for wood, alkyd primers, reinforcing and bonding compounds, metal primers) designed for different types surfaces and materials of subsequent layers.

Substances that make up the primer coat must not react with substances from paints and varnishes that will be applied over the primer. Therefore, before proceeding with the repair, it is necessary to find out what type of primer is suitable for a particular paint and surface. So, for example, a deep-penetrating universal acrylic primer fits perfectly on plaster, brick or concrete. Putty, plaster and other finishing materials will subsequently perfectly fall on compositions of this type.

Priming compositions will also come in handy if it is necessary to process a loose, crumbling surface. For repair work with such surfaces, deep penetrating compounds have been developed that can thicken the surface and prepare it for painting or finishing. The cost of a deep penetration primer is quite high, but for quality repair it is sometimes indispensable.

If you are going to carry out repairs in a room that differs high humidity, then pay attention to such material as the universal acrylic primer Bulls Eye 1-2-3 Primer Sealer Stain-Killer. The composition of this coating includes antiseptics that prevent the spread of mold and fungi. This acrylic primer is perfect for surface treatment of various materials- concrete, brick, drywall, chipboard, wood, metal and many others.