Types of primers for a car, which primer to choose for a car for painting
Content
Before choosing a primer for a car, you must first decide for what tasks it will be used. Then study the characteristics of the mixture, read the reviews of motorists.
If painting work is planned with the car, then it is important to know what types of primers are for the car. The adhesion of the paintwork to the body and its resistance to corrosion depends on the choice of a suitable composition.
What are primers for cars
This mixture with inhibiting elements is used as a base before vehicle painting. It serves to level the roughness on the surface and provides a strong connection with the paintwork layer.
Body priming
If the paint does not adhere well to the body, then microcracks and chips will occur. Due to a small scratch after water ingress, rust may appear. To avoid this, it is necessary to prime the car with a primer before painting. This procedure is called passivation. It is performed using a special gun, roller or spray can. After processing the metal, enamel is applied.
Auto primer has better corrosion resistance than iron car body. This is possible thanks to special zinc and aluminum additives.
Primer purpose and use
The mixture is a connecting protective link between the body and the applied paint. There are different types of primers for a car and their application can be as follows:
- Primary processing of a metal surface. To do this, take a dense composition based on epoxy.
- Smoothing surface defects. Use a thick putty with good water resistance.
- Protection of the mixture structure from corrosive paintwork elements. For this, a sealant is used.
To properly prime a car, you must follow the rules:
- The surface to be treated must be completely free of dirt and grease.
- To spray the composition, use an airbrush or spray can.
- Before matting, the layer must dry.
- Paint with a mixture of the same brand.
- Fill the body with liquid putty.
If the mixture contains a hardener and a base material, then their proportion should be observed. If the ratio of components is violated, the soil will not be able to fully ensure its adhesive and anti-corrosion qualities.
Main properties and characteristics
To prevent delamination during painting, painting skills are not particularly needed. It is important to know the characteristics of each mixture. For example, you can not use a lot of anti-corrosion auto primer. It must be applied in a strictly thin layer. Then allow to dry before coating with the next component. If this procedure is not followed, adhesion will deteriorate, which will lead to cracks in the paintwork.
Acrylic primer
According to their properties and the principle of action of the primer, there are:
- Passivating. They serve to oxidize the iron coating with lead.
- Phosphating. Protect from the negative effects of temperature fluctuations.
- Protective. The main component is zinc, which prevents the destruction of the metal.
- Modifying. For rust treatment.
- insulating. They protect against moisture penetration.
Mixes come in 1 or 2 components. In the second case, the preparation consists of a base substance and a hardener, due to which the applied material dries quickly. On the market you can find alcohol formulations. It is not recommended to use them, as they are difficult to process and destroy the body.
The advantages of using
You can apply the mixture to the surface with an aerosol or a gun. Each option has its own advantages and disadvantages.
Pros:
- compact size;
- no preparation of the mixture is required;
- simple operation;
- uniform coverage;
- convenient application in local areas.
Painting a car in this way is inefficient. The process will take a long time and is only suitable for using a liquid mixture.
The advantages of the spray gun:
- provides maximum protection for the entire body;
- material dries quickly.
Among the shortcomings, it is worth noting that the composition must be diluted in a container, and an air gun must be purchased additionally.
Types of primers for cars
All mixtures are divided into 2 main groups:
- Primers (primary processing). Provide adhesion of the body to the paintwork, and prevent the appearance of rust.
- Fillers (fillers). Used for surface polishing and protection against chips.
Most modern compositions combine all the qualities of both types, but it is better to use different products for metal and plastic processing.
Acid and reactive soil
This is a wash-primer for applying to the bare car body. The component includes polyvinyl resins, and phosphoric acid acts as a catalyst. Thanks to this composition, a strong film is formed that is resistant to corrosion and dissolution. Reactive primer is applied in a thin layer (9-10 microns). It penetrates the metal and contributes to its passivation.
Primer for car
The mixture is one- and two-component. Hardens quickly. Putty must not be applied to it, otherwise a chemical reaction will occur under the paintwork and the protective film will be destroyed. Therefore, the acid composition is covered with acrylic paint.
Epoxy primer
This pretreatment mix contains resins and high quality active additives.
After drying (about 10-15 minutes), the material can be sanded with special paper and primed with acrylic.
Epoxy primer can be applied under polyester putty. In addition, it is allowed to paint wet mixture or when using hardeners.
Acrylic two-component primer
This filler is designed to fill the pores and mask defects on the body panel after grinding. Depending on the mixing ratio of the base material with the hardener (from 3 to 5 to 1), it has a different viscosity and layer thickness.
A mixture with acrylic resins is used as an intermediate material before applying the paintwork. It is a sealant and has good adhesive characteristics. The main filler colors that are used to reduce paint consumption are gray, black and white.
Soil for plastic
This primer is used for plastic car parts (bumper, fenders, hood). The mixture usually consists of 1 clear or yellowish component. Suitable for most types of plastic. Some formulations are incompatible with polypropylene.
Soil for plastic
Before applying the primer, the silicone surface of the part is heated (for example, by placing it under the sun's rays) and degreased. Another option is to wash the plastic under hot, soapy water and dry. Then apply the adhesive mixture in a thin layer.
Overview of popular manufacturers
There are various types of primers for a car in cans or cans on the market. The following models are the most popular.
| Name | Soil type | Tara | Features of composition |
| Protect 340 Novol | Acid | Bank | Perfectly protects against scratches and chips |
| BODY 960 | Canister, bottle | Does not require grinding. Hardens in 10 minutes. | |
| Spectral Under 395 | Epoxy | Spray | Ideal for rubbing |
| Novol 360 | Bank | Good adhesion to any surface | |
| Reoflex | Acrylic | Suitable for wet painting | |
| For plastic | Aerosol | Dries quickly (20 minutes) |
The best domestic primers, according to user opinions and reviews, are considered Zincor Spray and Tectyl Zinc ML. Both preparations are developed taking into account the Russian climate. They are applied to the surface of the car with an aerosol. They contain special inhibitors that prevent the appearance of rust. The average cost of a spray can is in the range of 600-700 rubles.
How to choose the right primer
Regardless of the method that will be used in the processing of the body, you should buy a mixture of high quality. Cheap drugs have weak adhesion and anti-corrosion properties. From them, over time, the paintwork sags and cracks appear.
Before choosing a primer for a car, you must first decide for what tasks it will be used. Then study the characteristics of the mixture, read the reviews of motorists.
You can not buy products from little-known brands. Such an attempt to save money can adversely affect the life of the paintwork. For better adhesion of the adhesion effect, it is recommended to take mixtures from the same company.
