The choice of a particular type of paint should be approached as responsibly as possible, since the durability of the coating, its aesthetic characteristics, as well as the ability to provide conditions for a comfortable stay of a person in the room depend on the solution of this issue. When choosing a paint composition, you should also consider whether this painting will be the first or whether it will be a repair of a previously painted surface.
Many property owners who have decided to make redecoration in the premises of their apartments or houses are interested in the answer to the question: “Is it possible to paint with acrylic paint surfaces that were previously painted with oil paint?”
It should be noted right away that one should not try to find an answer to this question among sellers of building materials stores or specialists who have worked all their labor activity with only one of the indicated compositions. Most of these people may not even know from which source components the LKM data is made, so they cannot draw a conclusion about compatibility. Having received an answer from them, the home master runs the risk of hearing a purely individual opinion and, as a result, making the wrong choice.
Oil paint
Even in the very last years of the previous century, oil paints occupied a leading position in the paintwork market. These coloring compounds were in demand everywhere, they were applied on any both internal and external surfaces of the premises of any economic purpose. The positions of oil paints were somewhat shaken after the appearance of nitro enamels on store shelves. And after the widespread production of water-dispersible coloring compounds was established, oil paints became less in demand in comparison with other coatings.
Currently, oil paints are used very rarely. However, many home masters of the “old school” still strive to use only them, explaining their choice with the following reasons:
- Oil paints have a low cost. As long as the oil compositions differ from their counterparts in more favorable prices, they will be in demand. Oil coatings are available to any buyer, regardless of the thickness of their wallet, which allows them to save a very decent amount of money during the painting of large areas.
- Oil paints are resistant to moisture. They perfectly protect wooden, concrete and metal surfaces from the harmful effects of water. They can be used for painting both indoor rooms and any external surfaces: house facades, roof structures, poles, fences, etc.
- Ease of use. In order to paint any internal or external surface, absolutely no instructions are required. All that is needed is a can of paint and a brush. Sometimes you need to add a certain amount of solvent and mix the composition.
By the way, many home masters who do not know whether it is possible to apply acrylic paint over oil paint, opt for oil coatings. They explain their actions by the fact that previously the surface has already been treated with paint, which is based on drying oil, which means that there is no need for additional surface preparation. Simply put, if such paint has already been used, then, in order to avoid problems, experimenting and, as a result, it’s not worth the risk.
Despite the many indisputable advantages, oil paints and varnishes are not without certain drawbacks, the main of which are the following indicators:
- A small selection of colors. As a rule, in construction stores you can find oil paint, presented in only a dozen shades, which negatively affects the possibility of developing a variety of design solutions.
- The coating has low strength. Often cracks and chips appear on a surface painted with oil paint. The elimination of these defects is possible as a result of repeated staining, which takes a certain time and requires cash investment.
- Vapors of oil paint are toxic. The room in which the painting is performed using oil coatings is filled with a smell that is not safe for human health, therefore, when performing this type of work, it is necessary to organize effective ventilation. Until the painted surface is completely dry, it is forbidden for a person to be indoors.
Oil paints and varnishes are made on the basis of drying oil. In turn, drying oil can be either natural or 45% consisting of synthetic additives. To give the paint a particular color shade, mineral pigments are added to the drying oil, after which the composition is mixed to a consistency of a homogeneous viscous mass.
Acrylic paint
Consider the advantages and disadvantages of acrylic paint. Among the advantages of using acrylic coloring compounds are the following characteristics:
- Ecological cleanliness. In the composition of paints and varnishes of this variety there are completely no components harmful to the human body, which in our time is considered a very important characteristic. Even during direct work with paint, when painting a particular surface, the painter does not smell.
- The widest range of color shades. Currently, acrylic paints are represented in the market of paint and varnish materials by a wide range of color tones. Even in the case when the desired tone is not on the counter, the paint of the right color for the customer will be prepared directly in his presence, by mixing two or three samples of paint of different color shades on a special machine. This opportunity provides the implementation of any design development.
- High degree of resistance to moisture, ultraviolet radiation, temperature changes. This allows the use of acrylic paint for processing both internal and external surfaces. It should also be noted that the layer of acrylic paint laid on the surface to be treated is vapor permeable, as a result of which there will be no accumulation of moisture on the walls.
- The durability of the coating. In comparison with its oil counterpart, acrylic paint will last longer, at least 2 times.
The only drawback of acrylic paint is its high cost. What will you do? For high quality you have to pay
Acrylic paints are composed of acrylic composite and water. After applying the paint, during its drying, evaporation of moisture and polymerization of the constituent components occurs, as a result of which a high layer strength is achieved.
How to apply acrylic paint over oil?
It is worth noting that you can apply acrylic paint to oil.
The simplest and most effective solution to this issue is to use a special acrylic paint called "Master - 121". This material is versatile and has excellent adhesion.
However, it must be taken into account that this acrylic paint can be painted over oil only if there are no cracks and chips on the old coating. Only under such conditions can you be sure that the acrylic composition will reliably lie on top of the oil layer.
Before applying the paintwork material, it is necessary to carefully prepare the surface for work. First of all, the surface is sanded with sandpaper with fine grain, after which it is necessary to clean it from dust and dirt. Further, the surface is degreased, and after complete drying, you can begin to paint work.
To achieve maximum results, acrylic paint should be applied in several layers.
If the old oil coating is cracked or begins to peel off, before applying the acrylic paint it is better to thoroughly clean and prepare the surface for applying the new material.
How to do this on different surfaces can be found in special articles on our website:
How to apply acrylic paint to oil?
And now, knowing the main advantages and disadvantages of each paint, taking into account the peculiarities of their chemical composition, we will answer the main question: “Is it possible to apply acrylic paint to oil without completely removing its layer?”
In the event that the layer of oil paint adheres firmly to the surface, does not peel off, it does not have cracks or chips, an acrylic paint called “Master-121” can be applied on top. This coloring agent is a universal composition, which is characterized by the highest degree of adhesion to even the most even and smooth surfaces.
Using "Master-121", you can be completely sure that the acrylic paint will reliably lie on a layer of oil paint. This option is the simplest solution.
Acrylic paint very well lays on the surface previously painted with oil paint. However, so that the acrylic paint does not begin to peel off from the oil base after some time, the painted surface must be treated in the most thorough way. During surface preparation, it is necessary to perform the following types of work:
- Thoroughly sanded with fine-grained sandpaper the surface on which the acrylic paint will be applied.
- Next, remove dust, dirt, abrasive material from the surface, and then degrease it. As a degreasing agent, you can use a solution of soap in warm water.
- Wait until the degreasing solution has completely dried.
- Paint the treated surface with several layers of acrylic paint.
Having completed the entire spectrum of the preparatory work described above, some home masters still doubt the reliability of such a connection. In order for the acrylic paint to lie well on the surface previously painted with oil paint, the coloring agent must be diluted with water in a ratio of 1: 1.
The fact is that the acrylic paint on sale is a fairly thick solution. After adding water to it in the specified proportion, a composition will be obtained that has the same properties, which will lie on the surface to be treated with an even and beautiful layer.
In the case when a spray gun will be used to paint the surface, the acrylic paint must be diluted with a special solvent. This solvent has two varieties, one of which will give the work surface a matte shade, the other - glossy.
Oil base
Some 20-30 years ago, oil enamels completely dominated the market. Such solutions were used both for painting facades and in rooms. Nitro enamel became the first serious competitor to oil, and finally the dominance of oil compounds shook after the start of mass production of water-based paints, primarily acrylic.
Oil paints and varnishes are made on the basis of natural drying oil or its synthetic analogue mixed with mineral pigments. To obtain paint, its components are ground until a homogeneous mixture is formed.
Today, oil-based paints and varnishes are used infrequently, but sometimes there is still a need for them, for the following reasons:
- Affordability allows you to paint large areas with minimal paints with oil paints. Low cost is the main factor in the popularity of oil: as long as prices are low, demand for such solutions will exist.
- Resistance to negative effects of moisture. The oil protects wood, concrete and metal surfaces from moisture penetration into their structure.
- Often, oil paint is chosen because the surface has already been painted with varnish. Not all home masters are aware of the possibility of applying an acrylic composition to such a surface, and therefore they choose the simplest option - they buy an oil solution.
- The application of this paint material does not require any special knowledge and skills: you just need to dilute the composition with a solvent and stir.
Oil solutions also have serious disadvantages that limit their use:
- Not too much choice of colors. Most often, the assortment of stores has up to 10-12 shades.
- Low coating strength. For this reason, the painted surface needs regular updating (at least annually), which will require additional financial investments and labor.
- Toxicity of solutions. This category of paints is characterized by a specific and very stable odor. If painting is carried out inside the building, you will need to organize high-quality ventilation. In this case, during the drying period of paint, avoid being in the room so as not to get poisoning with toxic fumes.
- Long drying times. It takes at least 24-48 hours for the treated coating to completely dry. And this under ideal environmental conditions (appropriate levels of humidity and temperature, as well as the presence of ventilation).
Acrylic base
Acrylate-based formulations are characterized by the following advantages:
- In comparison with oil, acrylic paints are much more environmentally friendly, since they do not contain organic solvents. Since water is the basis of acrylic solutions, such paints are free from a pungent odor.
- A huge selection of colors and subtle shades. There is the possibility of ordering the right color right in the store: the composition will be made in a special machine right in front of the buyer.
- Resistance to moisture, ultraviolet radiation, temperature differences, vapor tightness. As a result, you can use acrylic both indoors and for painting the facade.
- High strength surface. The coating becomes harder as it dries (water evaporation).
- Fast drying time - just a few hours. Moreover, some formulations can dry in just an hour.
- Long life of the coating. Compared to oil paint, acrylic is at least twice as long.
The only significant drawback of acrylic is its cost. However, the quality is worth the price.
Application of acrylic paint on oil
It is not recommended to apply an acrylic composition to an old oil paint, since in this case good adhesion of materials cannot be expected. It is much preferable if acrylic is used as the lower layer, and an oil solution is applied on top.
However, if desired, you can still treat the old oil layer with acrylic. However, in this case, you need to thoroughly prepare the surface.
Preparatory work is as follows:
- Grind the surface with a layer of old paint. For grinding, we need fine-grained sandpaper.
- We remove dirt and dust from the processed material, and then degrease the surface.
- We wait until the surface dries.
- Apply 2-3 layers of acrylic solution.
However, the preparatory work alone does not guarantee the successful application of acrylic on an oil base. To achieve the desired result, the acrylic composition should be quite thick, that is, diluted with water in a proportion not exceeding 1 to 1.
Note! If staining is carried out using a spray gun, you will need a special thinner. Depending on the type of thinner, the finished surface will acquire a matte or glossy shade.
Sometimes the oil composition is so firmly eaten into the surface that it is not possible to remove it. In such cases, paints with specially enhanced adhesive qualities, for example, Master-121, will help. Such paints are able to adhere even to moderately oily surfaces.
Acrylic Paints
Compared to oil formulations, acrylic paints have clear advantages. Acrylic compounds are environmentally friendly, do not emit toxic substances, since they do not contain organic solvents.
The basis of this material is water, due to this, when applied, there is practically no smell. Also, the material is distinguished by a large number of colors, and shades, this allows you to make the surface original. The necessary color can be ordered at a hardware store, and it will be made on the spot. The acrylic composition has high resistance to moisture, ultraviolet rays, and temperature changes, and also has good vapor permeability. Thus, acrylic paint is used to decorate the room inside and out. The painted surface dries quickly, just a couple of hours. When comparing paints based on oil and acrylic, the latter are considered more durable and resistant to wear. Such compositions are considered universal, and are used to create a different interior.
Can I paint with acrylic on oil paint?
Usually, experts do not recommend applying acrylic paint to an too old oil coating, since the materials do not adhere well to each other. But such work is allowed provided that the surface is thoroughly prepared. Work on the preparation of the surface begins with grinding the previous coating, for this use sandpaper with fine grain.
После шлифовки, поверхность тщательно очищают от загрязнения, и пыли, которая образовалась в результате работы, для этого можно использовать пылесос. Затем поверхность обезжиривают, и оставляют для высыхания. The dry surface is covered with 2 layers of acrylic based solution. But careful preparatory work does not mean a high-quality application of 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 diluent must be added. Gloss or dullness of the surface depends on the type of this substance. Sometimes oil paint eats heavily into the surface, especially if it is used for too long, then it can not be removed. In this case, special paints are used, which are highly adhesive, they are able to qualitatively paint even too oily surfaces.
Technology for applying acrylic oil-based paint
- First, the surface is ground, all dust is removed, a vacuum cleaner is used for this.
- Then perform the processing of the primer composition. And left to dry completely.
- The acrylic composition is applied using a brush or spray, in the latter case, special diluents are used.
- Begin to apply paint from the corners of the surface to the middle or from top to bottom. After completely covering the walls or ceiling, leave time for drying, usually a couple of hours, there are paints that dry faster.
The basic rules when applying acrylic paint to an oil composition
- To ensure a high-quality painted surface, it must be well prepared. The main oil paint layer is removed by grinding, and then dust is removed.
- All contaminants must be cleaned so that the acrylic composition lays evenly.
- In too advanced cases. If the oil is stuck in a wooden or other surface, use special paints with a high adhesion rate.
- Surface grinding can be done with fine-grained sandpaper or a special grinding machine. In some cases, a drill and a special nozzle are used, it is necessary to act carefully so as not to damage the surface.
- Mandatory action is degreasing, otherwise the new composition will not adhere well to the previous surface.
- To ensure high-quality adhesion of the paint to the previous surface, the acrylic composition should 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 acquiring material, it is necessary to take into account which color will be produced, initial or secondary. In the second option, the surface is covered, which has previously been processed by other compounds.
Especially taken into account when the walls are painted with oil paint, these are the consequences of old repairs. Usually, oil paint was used for kitchens or bathrooms. When choosing a modern acrylic based paint, you need to figure out what to do with the previous finish, namely the oil composition. This article describes all the advantages and disadvantages of oil and acrylic paints.
Usually it is not recommended to cover oil paint with acrylic composition, but this is possible if you resort to thorough surface preparation. The previous material is partially cleaned off by sanding with sandpaper, primed, and covered with acrylic paint.
