Zinc primer for automobiles. What is the best primer for a car. What are the options

Every car owner wants to protect the paintwork of their car from corrosion. A reliable base, foundation for paint and protection of metal is a car primer. On the modern market auto products presented a large number of a variety of products: from cheap to expensive, promoted and little-known brands. This means that the choice of autoprimer is not an easy task, but a responsible one. Let's figure out what you need to know about this tool and how to properly use its wonderful qualities?

Autoprimers calls a whole series of compounds intended for application to the surface of the body. A quality product is always expensive, but it is better to opt for it in order to avoid an unsatisfactory result and re-staining. There are several types of primers:

• Sealants: protect against the solvent properties of the paint, improve adhesion and make layers uniform.
• Resin-based epoxy waterproof primers: have a dense structure, protect against oxidation. Usually mixed with a hardener and applied in 2-3 coats. Does not require sanding after application.
• Primers (leveling primers): quick to apply, easy to sand, perform an adhesive and anti-corrosion function.

Compositions for priming the surface are distinguished by the presence various components. Based on this, they can be divided into:

• Alcoholic: they dry very quickly, within an hour, they are used in places where it is impractical to work with conventional primers.
• One-component: rarely used, as they do not contain a hardener, and therefore the drying process takes a long time.
• Two-component: thanks to additional components (hardener cans), such primers dry out within a day, and therefore are used more and more often. There are two types: hard and soft. The former are more stable, but more difficult to grind, while the latter are easier to process, but at the same time they shrink and, consequently, the paintwork deteriorates over time.

Primers are also distinguished by the method of protective effect on the metal. What are the primers in this regard? Each of them is best searched for by a special letter marking. The following categories are distinguished:

• with phosphating action;
• passivating;
• tread;
• with inert particles;
• rust modifier.

Phosphating primer

Composition contains phosphoric acid, forming in combination with the metal sparingly soluble phosphates. The resulting layer, despite its thinness (only 8-12 microns), is strong and has good adhesion. The primer is able to penetrate the metal to a depth of 0.05 microns. After applying the first layer, you can immediately apply the second. Which of the primers has phosphating properties is easy to understand, they are marked with letters - VL.

Passivating primers

These products make the surface immune to moisture (that is, passive) due to the chromates of certain metals contained in their composition. Due to this property, an oxidation reaction will not occur.

To protect the wings and bottom of the car from corrosion, a lead-surface primer is often used. When choosing a composition, it is also best to focus on letter marking- GF.

Protective means

Such a primer assumes the protection of the metal surface from the negative effects environment. The potential of the metal dust contained in its composition is lower than that of a car body. Thus, in relation to the car, such a primer acts as a tread. Letter designation EP and E are protective primers.

Compositions with inert particles

These primers mechanically protect the surface without interacting with other film-forming substances. These compounds are most often used during minor repairs body. Their marking, for example - FL-OZK, GF-21.

rust modifier

In fact, this primer is a converter of corrosion products. In cases where rust removal is impossible for some reason, the composition is applied directly to the damaged surface area, interacting with it. Corrosion elements are converted by the modifier into solid protective film. The composition in cans can be applied by spraying or brushing, in two layers. A prerequisite for high-quality work with such a primer is the air temperature not lower than +15 C 0.

The car can be covered with soil in a car service or on your own. However, before that, you should take care of choosing a quality product. It is best to purchase products of the same brand in order to avoid their negative mutual influence on each other. Which company is preferable is a matter of taste, but before starting work, you should carefully study the composition of the primer, its shelf life and compatibility with other products. Do not neglect the implementation of the instructions and be sure to dry the layers thoroughly.

Priming in a car service

A car workshop will provide the owner of the car with a quick and high-quality result, but such work will not be cheap either. The fact is that a professional who respects the client and his work applies several types of soil to the car body. In the beginning, a phosphating or acidic composition is used to ensure the best adhesion. The first layer of primer is applied to the washed, degreased surface. It does not require subsequent sanding.

To avoid poisoning when working with chemical or phosphating compounds, it is necessary to ventilate the room well.

The second part of the work is the application of 2-3 layers of a two-component soft or hard primer. This tool is best to hide minor flaws and defects on the surface. The time interval between applying layers is 10-15 minutes. If the surface is flat, then usually use a primer that does not require grinding and, after it dries, proceed to paint the surface.

Do-it-yourself priming

Doing the work yourself, especially carefully approach the choice of primer. What little-known manufacturer and its products guarantee good quality, it’s hard to say, and therefore it’s better to focus on popular, well-established brands. It is also worth paying attention that the primer copes well with small irregularities, but larger defects are eliminated with putty.

Thoroughly prepare the vehicle surface before priming. After reading the instructions, proceed to the application of the composition. Let the layers dry well, and then, for leveling, process with sandpaper with different size grains. Applying a smoother of a thicker consistency will hide the shortcomings of grinding. Be sure to use an auto sealant to prevent mixing of paint and primer.

In order to protect the car from corrosion, it must be primed. This means that just painting the car will not be enough, you need special formulations to get protection. It is also important to note that, depending on the composition of the primer along the chemical line, it can carry a wide variety of protection.

There is a barrier protection against corrosion, which is designed to keep the metal surface from water penetration. The main thing is that the paint is fixed on the surface as best as possible. She, in turn, needs to be prepared as best as possible. It will depend on this whether microcracks appear on the coating, whether the adhesion will be strong.

If there is a small gap, then it can also lead to corrosion. This process can begin to develop even in the smallest scratch. Especially if you get caught in the rain after this crack appears. There is also under-film corrosion, which penetrates under the coating, so damage to the metal develops. And all because of one small crack.

If you make a primer on the car, then you can ensure that the corrosion process will be stopped. The so-called passivation process.

Due to the fact that the composition includes phosphating substances, it is possible to obtain a coating by enameling that will protect the car from the corrosive process.

And all thanks to a variety of inhibitory pigments. How does a primer work? It makes it possible to combine the chemical action of the elements together with the body metal.

There is also protective protection. This is made possible by the material to which the powder is added, which has a resistance with improved performance against corrosion. This is much more than the presence of such substances in the metal to be protected.

Here are the additives that can be in the metal. We are talking about aluminum, zinc, and other metals that, unlike iron, do not rust. In this case, no one touches the protected material itself, they only cover it with a protective layer consisting of metal.

Each soil is different from the other in that they all have varying degrees corrosion protection. Also, each primer has its own scope. First, let's find out what to do when we decide to prime the car.

It all depends on what kind of solvent the primer has. Therefore, depending on this, two special kind primers. Firstly, we are talking about organically soluble, and, secondly, about the one that dissolves using ordinary water.

Consider another classification of soil:

• We prime an ordinary surface. In this case, there is no problem with roughness at all, so there is no difficulty in finding the soil to adhere to the surface.
• Now let's talk about problem areas. There is no roughness on them. We are talking about zinc, aluminum or copper coatings. This adhesion problem is due to the fact that a variety of chemical reactions take place on the surface of the metal.

The main thing is that you do not save on the purchase of soil. After all, if it is anti-corrosion, then you should think about purchasing a quality product, then there will be no problems with the coating. It will be reliable, which means that your car will be protected. Often use a primer in a spray can. It is easy to apply and costs very little. But often comes across a fake. If the goods from excellent manufacturer, then you can buy. It will be able to protect the car from corrosion. Unverified manufacturers usually sell counterfeit products.

When wondering how to prime a car, let's say that this can be done in two of the most common ways. First, it is done independently. Only without skills you will not succeed. Since the result is important, and for this you need the ability to prime. Secondly, the opportunity to contact the service station. There, your car will be primed by a specialist.

What is the purpose of using a primer? So you can protect any metal from rust. And this is possible especially for iron, which is most prone to this problem. Since the primer is applied over the metal, access to the latter is interrupted. So no corrosion.

What contributes to corrosion protection? it special additive, which is represented by iron oxide. Also, the primer can add more chemical elements, which also stop corrosion, besides, they decompose and eliminate existing rust themselves. In other words, it transforms.

If so, then this primer has special instruction, where it is reported that the solution can be applied directly to rust. Otherwise, it must be cleared first.

There is no need for the primer to be protected from atmospheric influences, temperature changes, in other words from rain and snow, hail and icing. Since the surface will still be painted later, which will protect it and the material from the adverse effects of the environment.

You can choose a special material, we are talking about enamel and paint. They contain some kind of anti-corrosion elements. When the car is painted by them, you will not have to worry about the vehicle.

But it's important to know if you've primed correctly. automotive vehicle. Then you can use your car for as long as possible. After all, the factory coating can be preserved for long years. True, it is important to perform a primer on right technology. Otherwise, it will be impossible to achieve the desired result.

There are several types of primer. It is about the method of priming, about chemical composition, about other characteristics.

To begin with, let's pay attention to the types of primer, which differ in the principle of its effect:

1. First of all, we are talking about passivation. It oxidizes the surface where it has been applied. Lead lead is used. True, it is very toxic, so it is not currently used. When the bottom and wings of the car have been processed, then the passive state sets in.
2. We are talking, secondly, about phosphating. Orthophosphoric acid is used. This forms a film that protects against adverse weather conditions. Its thickness reaches up to twelve micrometers. True, the adhesive properties of the layer are very high. The next layer is easily applied on top of it.
3. We are talking, thirdly, about tread primers. The composition consists of zinc powder, it differs in that it is able to restore the affected area of ​​\u200b\u200bthe metal. In this case, zinc is destroyed, and the metal of the body remains intact.
4. Fourth, we are talking about modifying. It is applied to the area that has been affected by rust. There is no need to clean up. In this case, the primer has a transforming property. It also has a protective function. It is only important to observe technological processes for the work to be successful. The ambient temperature should not exceed fifteen degrees Celsius. For high-quality priming, the primer is sprayed onto the metal.
5. Fifthly, it is an insulating primer. This can form a protective layer that protects against moisture. The composition of the primer has a very good adhesion, so it adheres to the metal perfectly.

Although all five types of primers have some differences, they all differ in that there are no decorative functions. More importantly, they are not resistant to weather conditions. So, the downside is that this primer needs to be varnished or painted. And to protect the body from rust, you need to regularly pass mastic over it.

The type of composition of the primer is also different, consider what kind of primer is:

• We will talk about one-component, in which no hardener is added. Therefore, such a primer dries for a very long time. That is why it is used very rarely.
• We will talk about two-component ones, which are more popular, as they dry many times faster.
• We will say more about alcohol, they generally dry out instantly. There are two types in this group. Firstly, we are talking about soft ones, which later spoil the coating due to shrinkage, and, secondly, hard ones that are difficult to grind, but last for a long time. If it is not possible to apply the previous types of primer, then this type is used. But the most running second.

Table. Optimal technical characteristics that the mass for priming should have.

This type of primer is classified as a paint and varnish material that helps protect the car from rust. This primer has two important features. Firstly, corrosion cannot damage the surface, and secondly, it is an excellent base for enamel to be applied over the primer.

Consider the basic rules for working with epoxy primer:

1. The coating must dry very well, and this takes time. Dry only properly, as indicated in the instructions.
2. The thickness of the layer should not exceed twenty-three micrometers.
3. In case of too viscous soil, it is diluted with water to obtain a more liquid consistency.

Spray primer is often used. It is sold in all specialty auto stores. Used as preparation before painting, as well as for local repair of body parts.

Only epoxy primer removes only small scratches.

If you have a large dent on your car, then use putty. Unlike other types of primer, epoxy dries faster and easily tolerates any temperature changes.

How is the soil applied? First, the surface is prepared. It must be clean, free of dust and moisture.

It is important to remember that epoxy is not applied to rust. It must first be cleared using grinder or sandpaper. The primer is applied in one layer, this is how you can save the car from rust, and also remain a holistic paintwork.

The machine has been indispensable and practical for several decades. vehicle. It can cope with the impact of various weather conditions, thanks to protective properties body. But, like all things in this world, over time it needs to be diagnosed and carried out. various kinds repairs.

A primer is a composition that is applied to the surface before any finishing material is applied to it. This is done in order, first of all, to increase the tenacity of the surface, but, in addition, the primer can improve frost resistance and level the absorbent surface. There are mixtures such as acrylic, acid, water-dispersion, latex, based on drying oil, alkyd or epoxy resins. The primer in spray cans is the most convenient in application.

The primer is sold in different types of packaging, most often found in jars or spray cans. Consider the main advantages of the latter option:

• The aerosol in the can is a one-component composition, i.e., immediately after purchase, it is ready for application and does not require additional preparation.
• Aerosol primer is more convenient to use and at the same time does not differ in its characteristics from the can version.
• Such a primer provides an even and smooth coating, and also allows you to achieve smoother transitions between surface areas with a non-ubiquitous treatment.

The only drawback and difference of such a primer is its density. After all, the composition must be well sprayed, so it is forced to have an appropriate fluidity.

Soil in cans will be great option for coatings such as:

• plastic;

• black metals;

• light alloys;

• aluminum parts;

• galvanized or chrome parts.

Primer for car

Autoprimer is used in auto repair to prepare metal surfaces for painting. Basically it is an epoxy primer. It is made from special resins and chemical reagents to create a protective film on the metal surface and prevent the development of corrosion processes.

Epoxy primer is available both in cans and in the form of a primer spray. For the repair of individual sections of the car, it would be better to use a spray primer.

Surface preparation before priming:

1. Wash and dry the area to be treated thoroughly.
2. Then degrease with white spirit.
3. Remove all signs of corrosion.
4. Sand the surface, but so that no irregularities remain on it.
5. Apply putty and fill in scratches, chips, etc.
6. Sand down.

After preparing the surface, you can apply an aerosol primer to the area of ​​\u200b\u200bthe car you need. It should be applied in two or three layers, while observing the intervals between applications. Read the instructions carefully, if you follow them, then you can not worry about the success of the work performed.

On the video: the advantages of epoxy primer in a can.

Application features

During construction to prepare the surface for application finishing materials Also, it will not be superfluous to use a primer in the form of a spray. Indeed, in this case, you can do without additional devices such as rollers, brushes, etc. There are mixtures designed not only for metals, but also for concrete, brick, plastics or wood. On average, one cylinder is enough to process an area from 2 to 6 square meters.

If you do not know on what basis to choose the composition, give preference to a universal primer.

Before applying an aerosol or any primer, you need to clean the surface well to avoid foam and other troubles. In general, the process remains unchanged: preparation of the processing area, drying, grinding. After that, you can use the aerosol primer in practice:

1. In addition to simple cleaning, you also need to degrease the surface, as the compounds may not adhere to it properly.
2. Right choice primer coating - very important aspect, although the composition, for example for wood, can also be applied to concrete pavement or metal, this will not improve adhesion, but, on the contrary, worsen the tenacity of the surface and finishing material.
3. Application. Shake the can well, then spray on desired area at an angle of 90 degrees. In this case, the balloon should be at a distance of 25 to 30 centimeters from the treated area. Most often, the application occurs in 2-3 layers with a time interval of half an hour.

Spray the contents on every inch of the surface, but smoothly, do not linger on one of the areas longer than on others.

Some tips for working with spray primer

in construction or repair work sometimes you have to deal with very rusted metal surfaces. But, few people know that it is not at all necessary to completely clean them, it is enough to remove sandpaper fragile fragments of rusty scab, which can fall off when further work. After this step, it is allowed to apply the primer directly on the rust.

When you need to leave some areas of the surface intact, stick on them masking tape or something similar.

It happens that when covering small items there is an overrun of the mixture, i.e., you can get by with a small stroke, and a volumetric jet escapes from the nozzle. In this case, you can simply extract a little liquid from the cylinder itself, just direct the jet so that it touches the inner wall of the jar, glass or any other small container.

After that, the priming liquid should be stirred so that excess gases come out of it. Now you can simply dip the brush and prime a small object with it without wasting a lot of material. It is important to remember that the temperature limits when working with an aerosol primer are not higher than +30 and not lower than +10 0 С.

Types of compositions and their description

Pick up correct option not very difficult, it is enough to take into account several factors: the type of material being processed, the operating conditions of the structure and the weather conditions in your area. A primer from a can can be used to treat many metal alloys and more. For this, they are used specialized types soil, here are a few representatives of these:

• acrylic primer. Used for the most various surfaces such as plastic, steel, aluminum parts, metal putty and so on. It is resistant to temperature extremes, moisture and harsh weather conditions. It has established itself as a reliable and high-quality composition.

• For different types plastics. On the plastic elements decor is applied with a single-component primer, which is contained in a can, plus it lies in the absence of any additional mixing. Synthetic primer made to work with plastic, designed to cover small areas such as a rearview mirror or bumper.

• Anticorrosive primer. This tool is in the greatest demand at the moment. Spray mixtures are applied to metal parts, this provides good protection against corrosion, and also adheres better to the paint and the surface.

• Firming. This composition is used in auto repair shops to repair dents, scratches or cracks on the car body. Several layers of this soil fill the damage, it hallmark is high adhesion.

• Epoxy primer in a can. The composition of the contents of the cylinder covers the body of the car thin film, improving adhesion, protecting it from corrosion and even mechanical damage. Enjoys great success with motorists and craftsmen.

• Etching or acid soil. This is a primer for metal, which means it should only be used on metal surfaces, its use on plastic or putty is strictly prohibited. After all, a feature of this composition is the erosion of a thin layer of metal to ensure reliable tenacity of the paint and combat the formation of corrosion.

It is worth noting that the aerosol primer based on epoxy resins dries for a long time. Thus, if you want a quick result, then you should use quick-drying products. The right choice of primer for a car or home renovation is based on the correct definition of the purpose, knowledge of the types of primer and their characteristics.

Aerosols in action (1 video)

If the foundation of the building is laid with high quality, then this can fully guarantee the durability of the structure. The same rule applies to the most ordinary cars, since the primer for the car is the base for paintwork and protects the metal from corrosion. If you would like to receive quality coating body, then you should not spare money for primer materials for cars.
This process is one of milestones body repair. Putty allows you to correct the shape of the part, and the primer helps in the treatment against corrosion, and is also an intermediate layer between putty and paint. This is important, since paint cannot simply be applied to metal or putty.

When priming, several products are used. It is an epoxy car primer, leveler and sealer.

Epoxy primer is water resistant. It is used to protect the surface from oxidative processes. Before application, the mixture is mixed with a hardener in a certain proportion. The substance is applied with a spray gun in a couple of layers.

The primer can also be applied in this way: first filler, then several layers of soil. Then they are sanded, and then a sealant is applied.

Epoxy primer is excellent in that when using it, there is no need for grinding. Minor imperfections found during painting can be eliminated with fine sanding.

High-quality soil is quite expensive, but if you save money, then soon you will need to repeat the operation again.

Inexpensive primers shrink over time, and all defects become clearly visible. Obviously, their correction will require additional costs.

The primer on metal perfectly adheres to the surface and protects the metal from corrosion.

There are passivating primers that contain chromium compounds and make the surface water resistant. This material with inert additives is protected not chemically, but physically without passing water. It is used for small (local) work.

Primer tread compounds contain inclusions of metals that have a lower potential compared to iron. In the event of damage, this type of material will be the first to react with an aggressive environment, that is, it will protect the metal. Other types of car primers are also used: phosphating, rust modifier primers, one-component, two-component, alcohol.

The main types of soils used for car repair

There are primers of various colors that allow you to save paint. Acrylic types are used together with special acrylic thinners. It is important to remember that it is better to use solvents from well-known brands.

Remember to wear things like a respirator and gloves when doing body work to help minimize hazards.

How to apply?

Working with metal. With this type of work, care must be taken to protect against corrosion. Before painting, it is required to subject the metal to an acid primer, which will help protect the surface from rust. Then you need to process epoxy resins, and then primer against corrosion type 1K.

Acid primer. This type of priming is carried out using a product that consists of two components. It is good for twenty-four hours after stirring if its temperature is twenty degrees Celsius. The main work is carried out after the acid soil has dried, but this layer still has activity on the surface. Acidic soil is subjected to polishing with a sandpaper with grain P280-Z400. Different layers can be applied with a break of five minutes. You can apply the mixture in two or three layers. It dries from thirty to ninety minutes at twenty degrees Celsius.

This type of material should not be covered with polyester putty, as it can dissolve the primer. Only a mixture of type 2K can be used. A protective primer can be safely applied to a hard putty, since the putty will not have chemical activity.

It is very important according to the technology of work to wait for the complete drying of each of the layers.

Soil drying phases:

1. The state of drying when the dust no longer sticks to the treated surface. When pressed, deformation of the superimposed layer can occur.
2. Suitability of the machined part for assembly. In this case, surface deformation can be observed with a strong impact on the part.
3. Complete drying. The paint layer can be processed and polished.

Acrylic primer application and treatment

The filler is the basis for the paint. The paint can only be applied on the primer or the previous coat of paint.

Filler Functions:

1. creating the perfect surface;
2. masking layers of previous materials;
3. paint base.

You can not paint the putty itself or the primer if it is acidic. Otherwise, the quality may decrease. end result, and inhomogeneities may appear on the treated surface.

Primer filler 2K includes acrylic in its base and is somewhat similar in properties to enamel paints.

The filling capacity depends on the content of the solid element and is divided into standard, medium (MS) and high (HS).

The filler is a layer or insulation. It is applied in several layers with an interval of five to ten minutes. After acquisition solid state soil can be sanded.

If the goal is to avoid different shades coatings, then colored primers are used. They allow you to reduce the amount of paint used.

The type of filler depends on the work and the surface to be treated. If you manipulate the proportions of the composition, then you can achieve the desired properties of the substance. It is important to choose a hardener and solvent that depends on the air temperature.

Acrylic-based fillers retain their properties for one hour. Do not use more filler than necessary.

If you need to repair a large object, then the filler primer must be applied to the entire body. If there was no puttying, then it is pointless to use a filler. In this case, a primer against corrosion type 1K is used. If the surfaces are small, then the filler should completely cover the putty.

Acrylic primer is applied with a spray gun, and it is better to do this in a special chamber. If you use a special spray gun, you can achieve excellent quality coverage. The orifice of the remote control should be between 1.6 and 1.8 mm in size.

If the filler will be sanded, then several layers should be applied to eliminate irregularities.

After application, this layer must be subjected to diligent grinding. If this is not done, then defects will occur on the paint layer. The primer can only be sanded when it is dry. It is necessary to pay special attention to places where the thickness of the seams is increased. If the filler, which is not yet dry enough, is sanded, then there will be risks and the sanding paper will clog.

The drying time depends on what type of material was used and in what quantity. It can be dried from three to twelve hours at twenty degrees Celsius.

Grinding is carried out in two stages:

• rough grinding
• fine grinding.

With rough grinding, the surface of the filler is leveled. For this operation, sanding papers with increased grain size are used.

Fine grinding is carried out in order for the surface to acquire the desired structure and for the paint to adhere well to the surface and mask the traces of grinding. For this operation, sanding paper with a small grain size is used.

Proper grinding of soil and other materials is a stepwise process. It starts with a rough skin and ends with a thin one.

Final sanding. This operation directly depends on the number of application layers. paintwork materials. When painting in one layer, the film is thicker than when painting in two layers. If the painting is carried out in two layers, then the traces of grinding are masked by paint, not varnish. One-layer staining masks rough sanding marks. That is why preparing the surface for metallic painting is the most difficult.

Dry and wet grinding. In the first case, it is possible to achieve surface quality in a shorter time. Wet sanding is done without the aid of machinery and generates more waste. Dry grinding is carried out using special machines that suck up dust. Wet type allows the use of sandpaper for sanding with a smaller degree of grit.

Priming in car workshops

In upscale workshops, before painting a car, several layers of various primers are applied to the surface. First of all, an acid primer or phosphate primer is used, as it can provide best level adhesive indicators. Primary soil applied to the surface, free from dirt and grease. It is not necessary to grind the surface.

Then a couple of coats of a secondary primer are applied. Most often, a soft or hard soil of two components is used. Professionals use mixtures that do not need to be sanded. If the metal is very even, then in the second stage you can use the substance to create a glossy surface.

The choice and application of material

Before buying, it is important to make sure that the product has not expired. It is better to use products of the same brand in order to ensure the proper quality of work. It is also better to use proven brands of products.

It is important to observe the time for drying the primer. The surface can be leveled with sanding paper.

An automotive sealant should be used to prevent mixing of primer and paint layers. It gives uniformity to the layers and improves adhesion.

Most motorists sooner or later face the situation when some part of the car has to be painted. And this raises a reasonable question, what kind of primer to use for the best painting and further operation of the car?

Why do you need a primer in a car?

Automotive primer is used during the painting of the car, more precisely before applying the paintwork itself. The primer performs several main tasks:

1. Protection of metal from corrosive attack. When applying a paint and varnish coating, the metal remains covered only with it, that is, there is a high probability of damage to the coating with the subsequent occurrence of rust. Zinc-based substances are also specially added to the composition of the primers to prevent the appearance of rust. There are materials on the market for treatment to resist corrosion;
   Improving adhesion. When paint is applied to metal, the chemical process in the form of adhesion can be impaired. The primer contributes to a better interaction of paint and metal with each other;
2. Protection against external mechanical influences on metal. During operation, the machine is constantly exposed to stones, dirt and other factors. In the absence of a primer, damage immediately reaches the metal and causes corrosion of the body;
3. Alignment of body roughness during painting. After traffic accidents, straightening body parts to their original state is not possible. In this case, experts resort to using a primer to mop up irregularities.

On the video, what primer is best to use for a car:

Epoxy look

Epoxy products are used before the body painting process. Such products are intended for the primary coating of metal. Most often, such products are sold in spray cans (using an airbrush), less often in cans for subsequent dilution.

The composition is applied in a thin layer to the surface and in a short period of time forms a layer on the metal, which perfectly protects against corrosion and improves adhesion by an order of magnitude. Such products are used in combination with a conventional or anti-corrosion primer.

When using such a primer before painting in combination with several products, the effect of painting and subsequent operation is more qualitative. A well-known manufacturer of such a primer is the Spectral company and its Under primer series. These primers are sold in spray cans. Before use, the composition must be diluted with a solvent.

The cost depends on the series and the area covered, but on average it ranges from 1000-2000 rubles.

In terms of its effectiveness, an epoxy primer cannot fully compete with other compounds, therefore it is advisable to use it in combination.

On the video, how to choose a primer for a car:

Drawing on a car

The material is applied to the surface in several stages:

1. The surface to be coated must be thoroughly washed to remove all traces of corrosion. Then treat the surface with a degreaser;
2. After that apply epoxy compound thin layers with a spray gun or brush, after diluting it with a hardener;
3. Then the main composition of the primer (one-component or two-component) is applied to the dried surface in several thin layers. If roughness or unevenness is detected, level with a spatula or other tool and level the surface. Allow the surface to dry for several hours and regain its regular characteristics.

Anti-corrosion and two-component primers

Such compounds are used to treat the body to prevent corrosion. Products are treated with zinc and magnesium elements that prevent corrosion. Two-component primer differs in the content of several components (for example, with the addition of zinc). Such a primer requires preliminary dilution with a solvent and is sold in tin containers (cans weighing 1 or 5 kg). On the market the most famous manufacturer rust primer and anti-corrosion treatment is a company Novol.

The cost of processing in a specialized service varies depending on the amount of work and the amount of material, and averages from 1000 rubles and more.