Repairing painted surfaces is an inevitable process. Even if the finishing was previously done competently and with high-quality materials.

On at the moment There are many ways to remove old paint.

• Mechanical methods. Acrylic enamel and acrylic paint or other coating are removed with sharp objects or power tools, such as a drill with an attachment.
• Thermal methods. In this case, the paint softens, for example, construction hairdryer, and then deleted.
• Chemical methods. The finish is removed using a variety of removers.

However, the process of removing the old coating is long and labor-intensive. 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 a new finish directly to the old one. In this case, the question of compatibility of coatings often arises.

In this article we will talk about whether acrylic paint can be applied to enamel and vice versa. However, first we will understand the basic concepts.

Types of paints and varnishes

Included paint and varnish materials includes binders, fillers, pigments, solvents/diluents and additives. In order to competently use paint and varnish materials during repairs, you need to know exactly their composition.

Main Components

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 common types of binders used for paints and varnishes: alkyd and epoxy resins, oil-based (on drying oil), latex, acrylic polymers.
2. Solvent components are divided into 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 paints and varnishes, additives are added to their composition: stabilizers, emulsifiers, fungicides, antiseptics, etc.
4. TO separate category include special paints. These are anti-corrosion coatings, for example, Zinga conductive paint. Analogs with antiseptic properties that protect the base from mold and rot. Removal compounds small defects(irregularities, scratches, cracks), etc.

Oil and enamel compositions

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

After drying, they are non-toxic, light and moisture resistant.

1. Oil paints are produced on the basis of drying oil. White Spirit, gasoline, turpentine or solvent naphtha are used as diluents. The compositions are not expensive, but they take a long time (up to several days) to dry. The main disadvantage is that over time the coating turns yellow.
2. In enamel compositions, like binder, varnish is added. It gives the coating gloss and aesthetics. The instructions recommend using such paints for exterior paints and on metal, wood, concrete, and plaster. Enamels are moisture and light resistant. They also have anti-corrosion resistance.

Emulsion and dispersion materials

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

When the coating dries, it is not washed away by water.

1. Emulsion compositions are economical, environmentally friendly and fire safe.
2. They fit well on almost any substrate.
3. They dry quickly and do not have a pungent odor.

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

However, they are different.

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

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

1. Such compositions are frost-resistant after they are completely dry.
2. They are vapor permeable.
3. Suitable for alkaline substrates (concrete, plaster).
4. These paints are tinted very well.
5. Resistant to ultraviolet radiation, retains its original color for a long time.
6. They have the ability to repel water.
7. They have high mechanical stability.

About paint compatibility

Based on everything written above, we will answer the main question of the article - is it possible acrylic paint paint over enamel and vice versa.

1. Based on their composition, acrylic paints and varnishes can only be applied to the same old coating. They cannot be applied over alkyd enamels due to incompatibility of thinners/solvents. The new coating will simply curl (raise) the enamel.
2. In addition, it is not advisable to apply emulsion and dispersion compositions to old ones. The same applies to varnished bases.
3. But after emulsion and dispersion materials, you can use any enamels and paints.

Now let’s talk about how to apply a coating of acrylic paint with your own hands without removing the enamel.

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

Nowadays many liquid compositions described are sold.

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 paints and varnishes are incompatible, so between them it is necessary to create an intermediate layer of neutral compounds. By watching the video in this article, you will expand your knowledge base.

At the moment when the stage of painting the surface begins in the 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 paint and varnish 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 do they have? This is what 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 compositions is alkyd varnish, which is mixed with various fillers, as well as a solvent. The most commonly used pentaphthalic alkyd varnish 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, simply put, white spirit. It copes excellently with the breakdown of fractions of fats, oils and various organic compounds, therefore excellent for diluting alkyd paints. For fillers of alkyd enamels, marble or granite chips are used due to 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 the 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 binding agent. 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 - external and internal, due to their high mechanical properties, saturation and brightness.

These paints are classified into two main groups - enamels and oil paints. The latter are considered a separate type of paint and varnish materials, but most of them contain alkyd resins, so they can be considered a type of alkyd paint.

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

The choice of matte alkyd enamel is based rather on the taste of the buyer, because in terms of performance properties they do not differ from glossy ones. If you don't like glare from a painted surface, then matte alkyd enamel will suit you better. These surfaces are slightly more susceptible to contamination, but this is a minor problem, because any alkyd paint resistant to strong detergents and cleans well.

Comparison by main properties

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

Durability. The service life advantage is on the acrylic side. Intense exposure to the external environment means that alkyd surfaces have to be renewed after just a year. Moreover, if all preparation and application rules have been followed, the acrylic coating can last up to 8 years without the need for repainting.

Acrylic materials are more resistant to ultraviolet radiation. 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 its way compensates for the longer preparation for the use of such coatings than for alkyd enamels.

While acrylic shows itself to be a more durable and stable material, alkyd-based compositions have a wider range of colors and shades, and after application the colors look much more vibrant.

Advantages and disadvantages of paints

Alkyd enamels have these advantages:

• Lower price and ease of application, which is especially important when choosing a material for large areas staining.
• Alkyd compositions 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 bleach.

Alkyd compositions also have the following disadvantages:

• In the long term, they are not very reliable; over time, the surface will turn yellow and become cracked, so the paint will have to be renewed annually.
• Alkyd paints contain unsafe chemical components that cause bad smell which appear upon drying.

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

• Long service life and increased resistance to external irritants, which will retain excellent performance properties.
• A good option for indoor use, because there is no odor or harmful substances.
• Good possibility for use even in the most high temperatures heating surfaces - for example for heating pipes.

Disadvantages of acrylic compositions:

• The cost of such paints will be higher, and the selection of a truly high-quality composition will be more difficult. Its protective characteristics acrylic surfaces purchases take longer – from several weeks to a month.

Compatibility of alkyd and acrylic materials

Sometimes you may come across the question: is it possible to use acrylic paints to repaint alkyd surfaces? Or vice versa, is it possible to apply alkyd-based compositions over acrylic? There is only one answer - it is not recommended. Moreover, it makes no difference what kind of surface we are talking about, metal or wood.

The exact composition of any paint and varnish material cannot be fully known. Applying acrylic enamels over alkyd may result in active ingredients the latter can appear through top layer in the form of darkened spots and stains, thereby spoiling the entire surface. Otherwise, the alkyd paint may simply not adhere to the acrylic surface, as a result of which it will gradually peel off from the surface.

However, if a significant period of use of the painted surface has already passed and volatile elements have eroded from its surface, then it is possible to apply materials on top of each other. However, this should not be done on a “bare” surface anyway; it requires pre-processing primer. Important point– the primer must be the same type as the paint you will be reapplying.

Production of alkyd and acrylic compositions

Although the trend in production is to produce environmentally pure 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 everything paint and varnish production It is alkyd materials that occupy.

It is worth noting that foreign companies conduct 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 emphasis of which is on environmental friendliness. In this regard, acrylic products are more attractive from the point of view of use. However, the price of such a product is much higher, which ultimately greatly influences the consumer’s choice.

To summarize, alkyd-based paints are a very attractive choice - they are inexpensive, bright, dry quickly and have good durability. However, in the long term, acrylic enamels have an advantage, given that they are less toxic and can retain their properties for decades.

Consumers are often interested in the question: which paint is better - alkyd or acrylic enamel and what is their difference. In order to get an answer to these questions, you need to familiarize yourself with the purpose of each option, their differences in composition, as well as positive and negative qualities.

About the composition

Acrylic paint largely consists of acrylic, which due to its chemical properties called a polymer emulsion. To give a substance color, color pigments are added. The main difference between enamel is the absence of the pungent odor characteristic of other substances, which is due to the use of water as a solvent. The composition also includes special additions that affect the material’s resistance to temperature changes and improve its viscosity.

Alkyd paint consists largely of alkyd varnish, color pigments and a kerosene-based solvent. Some paints contain additives that have fire-fighting, antifungal and antiseptic effects. That is why such enamels are often used for woodworking.

Details about acrylic paint and its use

First of all, let's consider positive qualities acrylic paints and enamels:

• Preservation of original properties even under high temperature influence. Thanks to this, the material can be applied to radiators and radiators of heating systems;
• Long service life. The paint used for wood can last up to 10 years, and for metal and plastered surfaces - up to 20 years;
• It is resistant to ultraviolet radiation, therefore suitable for external application;
• Protection against corrosion, which allows you to paint surfaces that have already appeared rust;
• Another good quality is that you can apply acrylic paint without fear of releasing harmful substances and an unpleasant odor.

But it is also worth considering the disadvantages:

• High cost compared to alkyd paints;
• Long drying time;
• Difficulty in acquiring the necessary and high-quality material.

In order to use acrylic paints well and efficiently, you must adhere to the following rules:

1. Remove the old coating and clean the surface very thoroughly sandpaper;
2. Apply a special primer to prevent rotting;
3. Add the required amount of water to the paint and mix the composition thoroughly;
4. Distribute the mixture over the surface using special brushes and rollers.

Before painting with acrylic red, the surface must be very well cleaned of dust and other contaminants, and also dried no less well.

About the features of alkyd paint

About the advantages of alkyds:

• Low cost, which allows the material to enjoy unprecedented popularity among consumers;
• It is applied very simply and does not require the use of special devices;
• Best choice color range, and an important difference is that all shades are very saturated and pronounced;
• Fast drying.

But alkyd materials also have disadvantages:

• Short service life, which can manifest itself in the form of characteristic yellowness and cracks just a year after painting;
• Instability to ultraviolet radiation and therefore the paint cannot be applied outdoors;
• When painting with alkyd paints, long-term ventilation of the room is necessary, since the composition contains toxic chemicals.

If there is an urgent need for external use of alkyd paint, you need to purchase a product with special improving additives. And if possible, place the painted surface in a shaded area.

It is also important to remember that applying alkyd-based varnish to alkyd paint is undesirable, but if absolutely necessary, you need to clean the surface with sandpaper and only then start working.

Use of enamels for cars

Now let's look at what enamel to use for cars: alkyd or acrylic? And what is the difference between alkyd paint and acrylic paint?

The place of primacy in this area is deservedly given to acrylic material. This is due to the fact that the product has good reflective characteristics and resistance to mechanical stress. In addition, the applied product dries quickly and gives minimal shrinkage.

Alkyd enamel for a car is not the best because it has a long drying period and does not provide such a uniform shine as an acrylic coating. The disadvantages of such auto enamel are compensated by its low cost. Also, here it is possible to apply one thick layer of alkyd, while acrylic auto enamel needs to be gradually painted thin layers, each of which must dry well.

Acrylic and alkyd paints: compatibility

Can acrylic paint or enamel be applied to an alkyd coating and vice versa? This question is very interesting and also requires careful analysis.

Experts, in general, do not recommend applying acrylic to alkyd bases. Without treatment with a special primer and stripping, the service life of the coating can be significantly reduced. There is also a chance of successful painting. This depends on the unpredictable behavior of the compounds, which can swell or provide an ideal, flat surface.

If you apply an alkyd composition to an acrylic base, the result will definitely not please you. After a short time, the coating will begin to peel off.

If there is an urgent need to paint an alkyd surface with acrylic paint, you should perform several simple preparatory steps:

1. Careful processing is carried out with fine-grained sandpaper;
2. Acrylic primer is applied;
3. The dried primer is coated with alkyd enamel (paint).

Thanks to the primer used and other preparatory activities adhesion between materials is significantly improved, which significantly reduces the likelihood of peeling.

When applying acrylic paint to alkyd, the wear resistance of the new coating is reduced by 2 times.

Conclusion

Acrylic or alkyd paints, which differ significantly in composition and characteristics, are a personal choice of the consumer. Which one to use depends not only on their pros or cons, but also on the difference in price and application technology. But, judging by the description of both compositions, we can conclude that acrylic paint is distinguished by its quality and a large number of positive properties. The alkyd composition has more low price, and for many this plays an important role.

Based on the above, we can conclude that in pursuit of quality and wear resistance, it is better to choose acrylic paint. But if we talk about beauty and budget savings, then it is better to give preference to alkyd paint. Which of the proposed options to choose is a personal decision for everyone.

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

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

Alkyd type can be called a more modernized option oil paints. They are characterized by a similar mechanism of hardening and 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. Paints may contain various additional components designed to improve certain properties (add elasticity, speed up drying).

• Service life. Unlike alkyd paint, the surface of acrylic paint retains its original appearance much longer. It is advisable to renew alkyd paint about once a year, since oxygen and ultraviolet radiation intensively 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 resistance. Acrylic practically does not change the properties of the surface film when exposed to sun rays, that is, it does not fade, does not turn yellow and does not acquire a “matte” appearance. Alkyd compounds are not so reliable in this regard.
• Drying process. But the alkyd film dries relatively quickly, and after just a couple of days it fully performs its protective and decorative functions. The acrylic film completes its formation approximately 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 the acrylic film is compensated by more high level resistance to mechanical stress (deformation, scratches).
• Decorative properties. Alkyd compositions are distinguished by a more diverse range of shades and undertones, as well as generally more bright colors. On the other hand, acrylic paint lasts longer and does not require regular updating.

Is it possible to apply alkyd compounds to acrylic or vice versa? Neither one nor the other is recommended, especially if the painting of the base occurred relatively recently or we are talking about metal surface. The fact is that the specific composition of the paints may not be completely clear to us. Alkyd compositions may contain components that will appear through the acrylic paint layer as dark spots. If alkyd paint is applied over acrylic, then it may not adhere to it, that is, it may peel off.

The only option for applying such paints to each other is to apply it to an old coating from which all the volatile components have already evaporated. However, even in this case, apply the top coat of paint only after treating the surface with a similar type of primer (that is, acrylic paint on acrylic primer and vice versa).

Alkyd and acrylic paints are some of the most common types of paints when it comes to serious painting projects: painting walls, metalwork, etc. Perhaps due to the similarity of the name, they are often confused. Do these types of paints really have anything in common?

Compound

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

The alkyd type can be called a more modernized version of oil paints. They are characterized by a similar mechanism of hardening and 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. Paints may contain various additional components designed to improve certain properties (add elasticity, speed up drying).

Basic properties

• Service life. Unlike alkyd paint, the surface of acrylic paint retains its original appearance much longer. It is advisable to renew alkyd paint about once a year, since oxygen and ultraviolet radiation intensively destroy the surface layer of paint. Acrylic coating, subject to surface preparation and paint application technology, can last from 8 (wood) to 20 (plaster) years.
• UV resistance. Acrylic practically does not change the properties of the surface film when exposed to sunlight, that is, it does not fade, does not turn yellow, and does not acquire a “matte” appearance. Alkyd compounds are not so reliable in this regard.
• Drying process. But the alkyd film dries relatively quickly, and after just a couple of days it fully performs its protective and decorative functions. The acrylic film completes its formation approximately 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 (deformation, scratches).
• Decorative properties. 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 updating.

Are acrylic and alkyd paints compatible?

Is it possible to apply alkyd compounds to acrylic or vice versa? Neither of these is recommended, especially if the substrate was painted relatively recently or if the surface is metal. The fact is that the specific composition of the paints may not be completely clear to us. Alkyd compositions may contain components that will appear through the acrylic paint layer as dark spots. If alkyd paint is applied over acrylic, then it may not adhere to it, that is, it may peel off.

The only option for applying such paints to each other is to apply it to an old coating from which all the volatile components have already evaporated. However, even in this case, apply the top coat of paint only after treating the surface with a similar type of primer (that is, acrylic paint on acrylic primer and vice versa).

There are several types of acrylic paints:
a) acrylic paints on water based(interior or facade paints);
b) two-component acrylic enamels (car acrylic paints in a can).
They contain two components: paint and hardener, and polymerize due to chemical reaction with a hardener, and this reaction is irreversible.
c) one-component acrylic enamels (used in aerosols). They dry in air due to the evaporation of solvents.

Acrylic two-component paints cannot be applied to alkyd and acrylic one-component paints, as they behave aggressively towards the latter. It is possible to apply alkyd and one-component acrylic paints to two-component paints, since the polymerization reaction is irreversible and the coating is durable.

Aerosol paints use a one-component base.

All aerosols dry in air due to the evaporation of solvents. Therefore, it is possible to combine the application of acrylic and alkyd aerosol paints. But you need to apply the paint no later than 30 minutes after applying the last layer of paint (acrylic or alkyd).

8. Is it possible to apply acrylic paint to alkyd paint and vice versa?

Also, the solvent plays an important role. If the solvent is aggressive, it can dissolve alkyd paint. Typically, more aggressive solvents are found in acrylic one-component paints. Therefore, when applying acrylic one-component paint over alkyd paint, you need to be careful and first make sure that the coating is not adversely affected.

In the case of applying alkyd one-component paint to acrylic, subject to temporary recommendations (no later than 30 minutes after applying the last layer of paint), there is no reason to be afraid, since solvents in alkyd one-component paints are less aggressive.

Repairing painted surfaces is an inevitable process. Even if the finishing was previously done competently and with high-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 are removed with sharp objects or power tools, such as a drill with an attachment.
• Thermal methods. In this case, the paint is softened, for example, with a hair dryer, and then removed.
• Chemical methods. The finish is removed using a variety of removers.

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

In this article we will talk about whether acrylic paint can be applied to enamel and vice versa. However, first we will understand the basic concepts.

Types of paints and varnishes

The composition of paints and varnishes includes binders, fillers, pigments, solvents/thinners and additives. In order to competently use paint and varnish 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 common types of binders used for paints and varnishes: alkyd and epoxy resins, oil-based (on drying oil), latex, acrylic polymers.
2. Solvent components are divided into 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 paints and varnishes, additives are added to their composition: stabilizers, emulsifiers, fungicides, antiseptics, etc.
4. Special paints belong to a separate category. These are anti-corrosion coatings, for example, Zinga conductive paint. Analogs with antiseptic properties that protect the base from mold and rot. Compositions for removing small defects (irregularities, scratches, cracks), etc.

Oil and enamel compositions

The photo shows acrylic enamel.

Materials based on alkyd and acrylic resins include oil and enamel paints.

They are suitable for painting metal, wood and plastered surfaces.

After drying, they are non-toxic, light and moisture resistant.

1. Oil paints are produced on the basis of drying oil. White Spirit, gasoline, turpentine or solvent naphtha are used as diluents. The compositions are not expensive, but they take a long time (up to several days) to dry. The main disadvantage is that the coating turns yellow over time.
2. Varnish is added to enamel compositions as a binder. It gives the coating gloss and aesthetics. The instructions recommend using such paints for external and internal finishing works for metal, wood, concrete, plaster.

   Differences between alkyd and acrylic paints

   Enamels are moisture and light resistant. They also have anti-corrosion resistance.

Emulsion and dispersion materials

Water-dispersed composition.

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

When the coating dries, it is not washed away by water.

1. Emulsion compositions are economical, environmentally friendly and fire safe.
2. They fit well on almost any substrate.
3. They dry quickly and do not have a pungent odor.

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

However, they are different.

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

Pay attention!
The best analogues of water-based paints are based on acrylic resins and polymers.
They have high elasticity and strength.

1. Such compositions are frost-resistant after they are completely dry.
2. They are vapor permeable.
3. Suitable for alkaline substrates (concrete, plaster).
4. These paints are tinted very well.
5. Resistant to ultraviolet radiation, retains its original color for a long time.
6. They have the ability to repel water.
7. They have high mechanical stability.

About paint compatibility

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

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

1. Based on their composition, acrylic paints and varnishes can only be applied to the same old coating. They cannot be applied over alkyd enamels due to incompatibility of thinners/solvents. The new coating will simply curl (raise) the enamel.
2. In addition, it is not advisable to apply emulsion and dispersion compositions to old glossy and adhesive paints. The same applies to varnished bases.
3. But after emulsion and dispersion materials, you can use any enamels and paints.

Now let’s talk about how to apply a coating of acrylic paint with your own hands without removing the enamel.

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

After puttying, acrylic primer is applied.

There are a lot on sale now liquid putties and primers having 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 do not have the opportunity to remove the old paint, then a new coating can be applied to it. However, there are nuances here. Some types of paints and varnishes are incompatible, so between them it is necessary to create an intermediate layer of neutral compounds. By watching the video in this article, you will expand your knowledge base.

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Alkyd or acrylic primer: which one to choose?

Surface preparation before finishing with any materials is extremely important. Priming helps save you money, significantly improve the quality of your repair and extend its service life. How to choose the right one building materials and get the work done?

The primer is used for all types of substrates: metal, wood, concrete, brick, plaster, drywall, putty. Its main purpose is to provide a strong “grip” finishing materials, be it wallpaper, paint, varnish or tile, with a base. Paint and varnish technologies do not stand still, now you can find a primer that will protect wood from rotting and fungus formation, metal from corrosion, give plaster or putty special strength due to deep penetration or even color.

The choice of primer should be based on the type of substrate and the properties you want to give it. Today, a large assortment of acrylic and alkyd materials is presented on store shelves.

What is the difference between alkyd paint and acrylic paint?

The former are used for almost any reason. Their main advantage is that they are odorless. When repairing in small spaces acrylic primer is indispensable. However, if you need to carry out work on metal, then only alkyd material will help. It reliably protects iron from rust. Experienced builders prefer alkyd primers to acrylic ones for outdoor work.

The most common alkyd primer is GF-021. Its anti-corrosion properties can significantly extend the service life of metal products. In addition, the primer is often and successfully used for other types of substrates, for example, wood, drywall, brick, plaster. Specifications, which manufacturers indicate on the labels, give the right to call the GF-021 primer universal. In particular, on the bank trademark“Yaroslavl flavor” is what this term means. If you are in doubt about which primer to buy, then you can safely choose GF-021 primer. Technical characteristics, including consumption per 1 m2 and drying time, vary across all product lines. Before purchasing, be sure to read the instructions for use.

Traditional colors for alkyd primer are brown, red-brown and gray. The palette of this material does not always play great value, since most often it is applied under finishing materials. As the primer absorbs and dries, it becomes dull, but can affect the color of the future coating. If you choose a primer for light-colored wallpaper, then alkyd will not suit you.

Among acrylic materials, deep penetration primers stand out. They are designed to strengthen loose and fragile foundations. These may include concrete, plaster, wood, cement, plaster, plasterboard, and previously painted surfaces. This type of primer penetrates as deeply as possible into the base and reduces its absorption capacity, allowing significant savings on subsequent painting work. You will find such soil in the “Yaroslavl Color” and “Norma” lines.

The Braska line also includes a deep penetration primer, but it has additional properties that are valuable for repairs. It contains a fungicide - chemical substance to combat fungal diseases. The primer is ideal for woodworking, protecting the base from the formation of mold and harmful bacteria.

Acrylic primers, unlike alkyd ones, are colorless, some of them are used as an independent coating. This is your option if you are looking for a primer for gluing light-colored wallpaper. This type of primer can be used both indoors and outdoors.

You don’t have to worry about the quality of the coating formed by the primer if you choose it taking into account the existing base and finishing materials. In this case, the soil will responsibly fulfill all the duties assigned to it.

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Alkyd primer is an excellent analogue of imported primer. It can be used in cases where the surface to be treated does not need to be pre-impregnated.

Advantages of alkyd primer.

— high soil strength;

- resistant to abrasion after drying;

— reliably covers resinous knots. They are not visible even after several years;

— any paints (acrylic, alkyd, enamel, latex and nitro paint), glue (wallpaper, universal, PVA) and putties (acrylate and acrylic) lie smoothly on it;

— in addition to metal surfaces, alkyd primer is suitable for priming wood, plastic, plaster, laminated surfaces, chipboard, fiberboard, concrete, as well as surfaces previously painted with any paint;

- can be used when negative temperature;

- low toxic chemical composition. Can work without using special means protection, it is enough that the room is simply well ventilated;

— you can dilute the alkyd primer or clean the surface from it using white spirit. Inexpensive and accessible chemical.

Disadvantages of alkyd primer.

- long drying period;

— if the alkyd primer has not completely dried, some paints may curl upon contact with it;

- processed only upper part surfaces. That is, the alkyd primer does not penetrate deep into the material and cannot be used as a fixative for crumbling and loose materials. For them it is necessary to use acrylic primers;

- construction bandage from synthetic material that are not completely bonded to the surface should not be wetted with an alkyd primer. Because the bandage will bubble and stretch;

— despite the fact that white spirit is not a highly toxic substance, it is still quite harmful.

Is it possible to apply alkyd paint over acrylic primer?

Therefore, until the alkyd primer dries completely, the room must be well ventilated;

— the tools used for priming (brush or roller) must be stored wrapped in a rag moistened with white spirit. To prevent air from entering, they are additionally wrapped in polyethylene. This way the tools can be stored for a week. Then they can only be cleaned with special means.