Primer GF 021: technical characteristics and scope of application

Primer GF-021 is an alkyd emulsion that is applied to metal or wood as a base protective coating. It improves the adhesion of paint or enamel to the surface and prevents corrosion. It can be used during the initial or intermediate stages of painting to prepare ferrous metal for the final coat. But it can also serve as an independent means of processing. GF-021 forms a film resistant to temperature changes that reliably protects metal, plastic or wood from negative external influences. The scope of application of GF-021 is wide. Most often it is purchased for painting metal structures: garages, fences, fences, gratings, beams. But soil is also actively used in such industries as mechanical engineering, machine tool building, military industry, production of transport containers and agricultural equipment.

Short description

According to its technical characteristics and composition, GF-021 primer belongs to the group of surface-acting alkyd paints and varnishes. In addition to organic varnish, the composition includes dyes, fillers, solvent, stabilizers and driers. The main purpose of the material is the preliminary preparation of metal and wood before applying various enamels.

As it dries, a thin film forms on the treated surface. It is characterized by high density and minimal water permeability. Thanks to this, the dry residue can be either a protective base for paint or an independent coating.

Advantages and disadvantages

The advantages of the material come down to the optimal price-quality ratio. The relatively inexpensive composition copes well with protective functions: metal does not rust, wood does not rot, and is not affected by fungus and mold. Also cover:

• exhibits resistance to a wide range of temperatures indoors and outdoors (on average from -45 to +60 degrees Celsius);
• has abrasion resistance, low thermal expansion (does not crack);
• provides high adhesion to alkyd-based paints.

Classic colors of GF-21 primer: neutral gray and red-brown Source zdopt.ru
Also, GF-021 primer reduces paint consumption per 1 m2 of metal or wood. Plastic processing is acceptable. The enamel is easily distributed over the treated surface in an even layer. This way you can save on finishing materials and speed up the painting process.

There are 3 disadvantages. The organic product produces an odor. It takes longer to dry than stated (24 hours at +20 degrees Celsius). For example, a two-layer coating may require 48 hours. The soil does not have a penetrating effect, therefore it is not suitable for protecting and strengthening a weak foundation (loose or crumbling).

Advantages and disadvantages

The main advantages of glyphthalic primer are:

1. High-quality and long-lasting corrosion resistance – rust-resistant;
2. Good adhesion of wood or metal to paint and varnish enamel;
3. Resistance to temperature changes;
4. Resistance to mechanical damage, after complete drying;
5. You can apply it yourself using a brush, roller or spray gun;
6. Inexpensive cost;
7. Reducing the consumption of finishing material
8. Quick drying time - up to 24 hours.

The disadvantages include the vulnerability of the primer to a decrease in temperature during drying, as well as the fact that the primer does not penetrate deeply into the surface, which means it will not be able to adhere to porous or fragile materials.

Specifications

The primer composition is intended for work outdoors in temperate and cold climates. Here the coating retains its decorative properties for 12 months and its protective functions for up to 4 years.

Corrosion protection only works if the metal is properly prepared Source wp.com

See also: Catalog of companies that specialize in paints and finishing materials

The technical parameters of the soil look like this:

• degree of gloss – matte or slightly shiny finish;
• viscosity – from 45;
• permissible dilution – 20%;
• grinding – up to 40 microns;
• elasticity – up to 1 mm per bend;
• strength (impact) – 50 kgf/sq.cm;
• dry residue hardness – 0.35;
• density – 1.25-1.3 kg/l;
• grip – up to 1 point;
• delamination – up to 5;
• Touch dry - from 45 minutes to 12 hours.

The following can be used as a thinner:

• xylene;
• turpentine;
• solvent;
• white spirit;
• RE-3/4V in the presence of an electric field.

The production of the material is regulated by the current GOST 25129 of 1982. Based on the document, pigments and minerals can occupy from 54 to 80% of the total suspension volume. For non-volatile components, the limit is 55-60 units. The finished composition is subject to mandatory certification.

It is worth noting that the quality characteristics of the material correspond to the declared ones only if stored correctly. This is a humidity of about 65%, no sun, temperature within acceptable limits, sealed factory packaging. After opening the package, the primer is suitable for use for 6 months to two years (no more).

Primer storage conditions Source kraska-lkm.ru

Application technologies

Before applying the primer, you need to prepare it and prepare the base. To prepare the soil, you either just need to mix it well, or add the required solvent in the amount indicated on the package, and then mix well. If, when opening the package, a film has formed on top of the liquid, it must be removed, and then the contents of the container must be mixed. Afterwards you need to prepare the surface for application:

• The surface must be smooth, without visible large flaws - cracks, chips, welds and others.
• You also need to remove grease or oil stains using alcohol or another degreasing agent.
• Rust must be thoroughly cleaned off mechanically.
• The surface is sanded using sandpaper or hard and dense sandpaper.
• Before application, remove dust and other contaminants.

A primer can replace painting, as it is applied in an even, uniform layer, which protects well from many external factors, and the metal can be painted gray or red.

Sprayer for applying primer

The method of applying the primer is in 2 layers: the first is applied vertically, allowing it to dry, and the second - perpendicularly - horizontally. It is possible to apply the primer using brushes, a roller or a spray gun. But you should always have a brush in your arsenal for priming hard-to-reach places.

Primer gf-021 is an excellent material for protection against corrosion, moisture and mechanical damage. It can replace the surface color in gray or red. It is also cost-effective if there are high-quality mixture components that protect the surface for a long time.

Video description

This video shows a comparative experiment: which primer-021 dries faster:

Consumption

The consumption of GF-021 primer per 1 m2 for metal, wood or plastic varies. The average value ranges from 60 to 160 grams per square. In this case, a covering layer up to 1 mm thick is formed. As a rule, it is 15-20 microns.

It is worth noting that for GF-021, the consumption per 1 m2 of metal depends on several factors:

• density and absorbency of the base;
• smoothness and evenness of the surface;
• method of applying the material;
• thickness and number of primer layers;
• consistency of the working composition.

To ensure that the consumption of GF-021 per 1 m2 of metal during two-layer application increases slightly, craftsmen use a diluted composition for the first one. Also, to save material, processing is carried out by spraying using a spray gun. Rollers are practically not used, since coats take up a lot of soil and it is not always possible to apply an even, thin layer.

It is not recommended, but applying the primer with a roller is acceptable Source kraskoi.ru

Methods for applying primer GF-021

The primer is quite liquid, so it can be applied not only with a roller, brush, but also with a spray gun.
Another good way to process metal is dipping, jetting, or airless spraying. For each object, the application method is selected separately, taking into account the area, surface configuration, whether it is located indoors or outdoors. One of the popular application methods is spraying in an electrostatic field. It requires the use of a powered gun and pump. The equipment imparts an electrical charge to the primer mixture, and the material is sprayed due to charged particles. They repel each other and separate, forming a uniform layer on the surface. The advantage of this method is that it saves money, so electrostatic spraying is recommended for covering large areas.

Pneumatic spraying is also often used. The technology is based on the use of compressed air, thanks to which the primer is sprayed in the form of a dispersed mass. Therefore, a compressor is required to apply the primer. But the layer comes out quite dense. The pneumatic method is good to use when you need to reduce the number of layers of soil.

Application

Application of a primer is permissible on a prepared base. This means that the following must be removed from the surface:

• old coating;
• debris and oil stains;
• foci of biological and corrosion damage.

To work, you will need mechanical cleaning tools and chemicals. These include paint removers, fungus and rust removers, and degreasers.

Since the primer contains an organic solvent, when working with the material it is important to use personal protective equipment for the eyes, respiratory system and skin. Before drying, the composition is easily washed off with white spirit, solvent or turpentine. The film is removed only with special paint removers.

Metal processing by spraying Source lapti.tech

How to prime a metal surface

Surface priming takes place in several stages:

• preparatory;
• direct application of primer.

Preparation

If the surface is properly prepared, the primer application procedure can be of the highest quality possible, without the need for further painting. This feature ensures the smoothness and uniformity of the GF 021 coating.

Step-by-step surface preparation for priming:

• cleaning of material, elimination of rust, removal of debris, dirt, dust;
• elimination of visible protrusions, dents, burrs.

If finishing is carried out indoors, then door and window openings must be protected with construction tape or film.

Application of primer

The optimal ambient temperature for work is considered to be from 5 to 40 degrees Celsius. Humidity in this case should not be more than 80%. It is not recommended to prime walls in strong winds, as well as during snow and rain.

Options for applying GF 021 per m2 of surface:

1. Pneumatic spray. It is worth setting up the equipment according to the instructions from the manufacturer. When working, you should maintain a distance of 20–40 cm from the nozzle to the wall.
2. Airless spray. The distance from the device nozzle to the surface should be from 30 to 50 cm.
3. Manual application. Experts recommend priming the material using a lint-free roller or a brush with natural bristles.
4. Stripe coloring. To paint welding seams, end edges, and other hard-to-reach places, GF 021 is applied before the surface is completely treated.

Priming is carried out in 1 or 2 layers. The thickness of the single-layer coating GF 021 is 15 – 20 microns. The drying time of the soil is not long; the surface is considered ready for painting within a day.

How to dilute

If the viscosity deviates from the norm, GF 021 must be diluted. For this procedure you can use the following substances:

• white spirit, turpentine, solvent;
• solvent or xylene;
• xylene with white spirit;
• solvent RE-3V, 4V.

The volume of solvent should not exceed 25% of the total soil. Stirring is carried out by stirring with a drill or an attachment - a stirrer.

Common Mistakes

The main mistakes made by the master when priming:

• ignoring the removal of grease stains will lead to them coming to the surface over time;
• painting the material until the primer is completely dry;
• use of PVA glue or water-based composition in the work.

Briefly about the main thing

GF-021 is a surface-action primer based on alkyd varnish and organic solvent.

The main purpose of the material is to protect metal from corrosion, wood from rotting and biological damage. It is acceptable to use a composition to improve adhesion between plastic and enamel.

The average consumption is 60-160 g/sq.m. The indicator can be adjusted by adding a diluent to the mass and applying the composition by spraying.

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Storage, safety and certification

Manufacturer's warranty – at least 6 months. For safety, use a respirator and gloves when applying the product. Goggles are needed for protection if the primer is applied with a spray gun. Provide constant ventilation in the room.

Keep the product away from fire. As for the quality of products, it is confirmed by certificates of conformity, certificate of hygienic certification and other documents. All product batches have a quality certificate. Standardization is carried out in accordance with GOST 25129-82.

Certificate of Quality

To ensure that the product retains its characteristics and provides coating protection, follow the product storage rules. Be sure to store the product in the original container, closed, in a cool place, protected from water and heat, and ultraviolet radiation. Then the GF primer will not lose its qualities and will protect the surface as much as possible from corrosion and moisture.

Rules for preparing surfaces for priming

Primer GF-021 is needed for preparation for subsequent application of enamel. Recommended compatible materials for the primer film are enamels of types UR, HV, PE, HS, EP, ET, MCh KF, MS, NTs, PF, MA, AU.

For metal surfaces (structures of industrial facilities, garages, support poles), a primer can also replace painting, thanks to the formation of a uniform, durable layer of gray or brown color. The resulting film lends itself well to sanding without the sandpaper sticking.

Before priming the product, the following preparatory work is carried out:

1. The primer is mixed so that its density is uniform and diluted with a solvent. If a dense film forms, it is removed from the soil surface.
2. Before painting, the metal surface is treated with sandpaper or special compounds and degreased. If an old metal part is being processed, it is advisable to remove rust from it mechanically.
3. The surfaces to be primed must be free of cracks, protruding welds, burrs and sharp edges.

Carrying out priming work - the main nuances

The instructions regulating the use of GF-021 primer specify that the material can be applied with a roller, brush or spray gun, as well as by pouring or jetting. Apply the primer in 2 layers in a thin layer, smoothly, without sharp strokes. In this case, usually the total thickness of the coating does not exceed 18-25 microns.

Work on both metal and wood is carried out only in rooms with good ventilation, since the material has a pungent odor. For safety, gloves are also used, since the material is dangerous for the skin and mucous membranes (this only applies to liquid soil, not dried film). It is not allowed to carry out work near an open flame (the product is flammable) and at temperatures below +5? C.

The applied primer becomes matte after drying. It can be used as a base layer or enamel applied on top. Before further coating, the primed surface is sanded with P600 or P800 sandpaper - the surface becomes smooth and the paint applies without defects.

Manufacturers and prices

The universal primer GF-021 GOST 25129 is offered by Omega, Lakra, Tex, Unisil, Prestige, Autotrade and Zebra. The material produced in accordance with GOST is red-brown, and the shade is not standardized. However, they sell soil in both gray and white colors (they are produced according to specifications).

The manufacturer must attach a certificate of conformity, a hygienic certificate, and a quality passport to each batch of primer. The documents confirm that high-quality raw materials were used in the soil production process and that the resulting material complies with regulatory requirements. And since the raw materials are used domestically, the cost of the material is affordable.

GF-021 soil can be supplied in retail or industrial containers - 0.9 cans; 2.8 kg or metal containers 25; 50; 250 kg respectively.

Advantages

Advantages of GF-021 soil:

• strong prevention of rust;
• weather resistance;
• dries quickly;
• protects against the aggressive effects of chemicals. reagents and household chemicals;
• can be used at high humidity levels;

• increases the adhesion strength between the surface and other paint and varnish material;
• reduces the consumption of coatings (varnish, paint);
• ease of application with conventional painting tools - brushes, rollers;
• price.

GF primer is often used in conjunction with other paint and varnish compositions, which are based on completely different components (bitumen, oils). A popular combination is the simultaneous use of GF-021 and alkyd enamel PF-115.