Application of a primer for metal

A universal primer is used for processing metal, wood, plywood, and plastic. The composition is needed to prepare the surface for subsequent finishing or for protection. Primer GF 021 protects the material from moisture, rust, increases the adhesion of subsequent layers to the base.

Description of the primer GF 021

Glyphthal primer is a composite composition based on alkyd varnish. The consistency is in the form of a suspension - a liquid solution containing crushed solid particles.

The composition differs in characteristics:

  • viscosity at a temperature of + 20 ° - 45;
  • non-volatile components should be no more than 55 - 60%;
  • does not lose elasticity when bending up to 1 mm;
  • dries at room temperature in 24 hours;
  • shows resistance to the action of oils - 48 hours, three percent bleach - a day.

The thickness of the layer when priming with the first layer is 15 - 20 microns, the second is slightly thinner. It is recommended to apply to the surface twice, while waiting for the first layer to dry.

Appointment

The purpose of priming is creating an adhesive layer on surfaces and parts, to which it will be better to adhere the topcoat (enamel, paint, varnish). The top trim will not bulge, flake, crack or wrinkle. Processing reduces the consumption of paints and varnishes, and also serves as a separate protective coating.

GF 021 is used on materials:

  • wood;
  • plastic;
  • iron, including rusty;
  • MDF, chipboard, plywood;
  • concrete.

The anti-corrosive compound withstands temperature fluctuations, it is used outside in winter conditions. GF 021 protects the surface from microorganisms, the development of mold, fungi. The composite is not absorbed into the base, it forms a thin, uniform layer.

Composition and properties

Information on the label

The soil is made in accordance with GOST 25.159 - 1982 on alkyd-type film formers. If oil polymer varnishes are used, the declared characteristics may not coincide with the performance indicators.

In addition to alkyd varnish, the soil contains components:

  • driers - oxidation catalysts, setting accelerators;
  • mineral particles;
  • additives to stabilize properties;
  • dyes;
  • rust suppressors;
  • other fillers.

The solution does not contain light-protecting components, so the color of the film is guaranteed throughout the year. It is recommended to cover the layer with a finishing material in order to preserve the color of the structures.

Pros and cons of GF 21 primer
Extends the life of the finish coat
Increases adhesion of two materials
The film is hard, can be sanded
Compatible with organic paints and materials based on aqueous solvents
Ease of processing, uniform flow, does not form drips
Reliable, retains its protective qualities for 4 years in open space
Availability due to low prices
Resistance to frost, temperature fluctuations from -45 ° to + 60 ° С
Flammable material
Drying time is extended when the temperature drops below + 20 ° С
The surface film does not penetrate deep into the surface, does not strengthen loose substrates

Varieties

Soil density ranges from 1.25 to 1.3 kg / l... The product retains its properties if manufactured in accordance with GOST.

There are varieties on the market:

  • the composition of GF 021 according to GOST is produced only reddish brown;
  • soil GF 021 gray, black or white color means that the material is made according to the TU (technical specifications) of a separate manufacturer.

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If in doubt about the composition, you need to see the certificate of conformity for products and hygienic. The manufacturer must provide a quality certificate together with the instructions. The goods manufactured according to TU are usually characterized by high consumption, the film thickness differs from the norm.

Primer consumption

To calculate the consumption, you can do a trial processing of a small area.

Sold primer for metal in different containers. The volume can be 1 or 3 kg for domestic use. For industrial areas of large quadrature, soil is purchased in cans of 30 - 60 kg.

To buy the required volume, the amount of material is calculated based on average standard consumption:

  • the first layer takes 120 - 150 g / m²;
  • the second will consume about 60 - 100 g / m².

To accurately determine the amount of soil for a specific area, do trial processing... The area of ​​the site is measured, the amount of material involved is remembered, and the consumption is calculated.

What does it depend on

Consumption will depend on the base material and application method.

The difference depends on the type of substrate to be treated and the method of applying the composition. For priming with a brush, upper limit values ​​are provided. The roller allows the soil to be rolled out more on the surface, the film will turn out to be thinner, therefore, the consumption will decrease.

The sprayer is economical to use, but you need to properly distribute the solution. If you spray on one area for a long time, there will be an overconsumption of material. Metallic products with complex shapes, such as I-beams, welded trusses, will require an increase in the volume of the primer.

Solvents used if the solution is thickened, difficult to apply. You cannot infinitely dilute the composition, since this will worsen its quality. Therefore, the consumption can only be reduced slightly. The type of surface plays a role: smooth, rough, with a touch of rust.

What can be diluted

The solvent for the GF 021 soil is white spirit, xylene, solvent, turpentine... Such solutions do not change properties, for example, the time of polymerization and appearance of the film remains the same. Use thinners RS-2, No. 649, 647, 650 (acetone). The latter varieties reduce the gloss of the finished film, accelerate the drying of the primer.

Breeding rules:

  • after the introduction of the solvent, the composition is well mixed by hand or with an electric drill with a mixer;
  • the diluent is added not more than 20 - 25% of the total weight.

For processing in an electric or magnetic field, take the solvent RE - 4V, RE - 3V.

Application rules

On vertical structures, internal walls, facades, drips remain if the solution is collected on a roller or brush with an excess.

Priming rules:

  • use a brush, roller, airless and pneumatic application, jet casting, dipping;
  • if the layer does not freeze, the thickness may be exceeded, you need to wait a longer time;
  • a time interval is maintained between the two treatments for the first layer to dry completely.

If the finish peels off in some places, it means that the base for the primer is poorly cleaned. With GF 021 paints and varnishes of groups are combined: NTs, MCh, PF, EP, KhV, UR, PE, MA, HS.

Surface preparation

Dirt must be removed from the surface, cleaned and degreased.

Primer PF 021 is a universal material, but its adhesion to the substrate largely depends on its readiness for processing. Sometimes priming can replace staining, since it gives the plane a pleasant and even shade. The resulting film has an even tint, smooth and shiny.

Conditions for acquiring such qualities:

  • cleaning from rust, dirt, grinding, then metal, wood, plastic must be washed to get rid of residues;
  • remove burrs, slag from welded seams, scale, sharp edges, corners and other layers;
  • the degreasing of the surface is important, solvents no. 647,649,650 are suitable for this.

The plane must be dry.Sometimes construction hair dryers and blowers are used for this.

Surface treatment

Wood belongs to the porous category, so the consumption of the primer material increases. The viscosity of the primer does not allow it to penetrate into the pores, but large cavities cannot be excluded. On an embossed surface, the primer forms a resistant film that adheres better to the surface than the finish. In this case, the soil layer due to its viscosity is not absorbed into the pores.

Processing rules:

  • concrete, brick loose surfaces need strengthening of the upper layer, therefore it is better not to use GF 021 on such materials;
  • it is not recommended to use different types of soil for the first and second application,

Priming work is carried out in a ventilated area, gloves are put on hands, eyes are protected with glasses.

Storage rules

The soil is sold in tightly closed containers, so the moisture content in the warehouse does not really matter. A mandatory rule is the placement of canisters with soil away from open flames.

Other storage features:

  • the shelf life of each manufacturer assigns from 12 to 36 months;
  • containers in factory preservation or open packages should not be stored near food products, electrical appliances, in the area of ​​direct sunlight.

Previously opened cans after long-term storage are checked for their ability to work. Sometimes dilution with solvents, thorough mixing, helps.

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