GF-021 (primer): GOST, characteristics

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

GF-021 primer has been known for over 30 years. During this period, the so-called painting primer has undergone a number of changes, but has not lost its relevance. The composition is a composition created on the basis of alkyd varnish, which is called glyptal. A primer of this type is used as a preparation for painting work, where metal bases are involved. On the latter, enamels and compositions made on an alkyd basis can subsequently be applied.

Specifications

GF-021 - primer, which is characterized by elasticity, short drying time, and resistance to external influences. All these features allow the soil to be used for the preparation of various products. If we consider the positive aspects, then it is impossible not to single out the ability of the mixture to protect metals from corrosion processes. That is why the paint primer is used as an independent product that does not require additional processing.

GOST 25129-82

GF-021 - primer, which, according to the standards, should have a red-brown tint, but not so long ago, gray and white varieties have appeared on sale. Their production is not regulated by the mentioned document, therefore, technical conditions are observed during the manufacturing process, but the recipe can be chosen by the manufacturer independently. If, after application, the surface is heated to 100 degrees, then drying occurs within 35 minutes. Under normal conditions, which are characterized by a temperature range ranging from 20 to 25 degrees, this time increases to 24 hours. After drying, the base acquires a semi-gloss or matte sheen. The product can be repainted with primer to improve the protective properties. Before applying the enamel, it is recommended to sand the resulting layer.

More information about standards

GF-021 is a primer with ductility in bending, which does not exceed 1 mm. Strength indicators are 50 cm. Experts quite often pay attention to hardness, which in conventional units is 0.35. Do not use a composition that is stored after manufacture for more than 6 months. However, a number of manufacturers indicate an impressive figure, which varies within 2 years.

Features of use

Primer GF-021 can be used at any temperature. But the application should be carried out only withplus temperatures, this requirement is due to the fact that the composition must reach the required consistency in a timely manner. After drying, the surface easily copes with the effects of high humidity, low temperatures, and also shows resistance to minor mechanical damage. Primer GF-021 is also characterized by negative aspects, the main of which can be called the lack of the ability to endure fire. The mixture belongs to flammable substances, therefore, fire safety rules must be observed when applying. This requirement also applies to the storage stage. After drying, the paint is not so exposed to the flame, however, in the first hours after application, it retains the ability to ignite and emit a smell. The latter property is explained by the presence of volatile compounds, which during evaporation contribute to the drying of the soil.

Recommendations for use

Primer GF-021, the characteristics of which are presented in the article, should be applied to a previously prepared surface. Depending on whether the base was painted before work or not, cleaning, degreasing and grinding will be required. As for cleaning and grinding, these should be done with appropriate tools, while the rest of the operation is done using white spirit. It is important to check how dry the surface is before applying the composition. If the base is characterized by high humidity and low temperatures, the primer GF-021, the GOST of which was indicatedhigher will not grip well. Among other things, the listed conditions contribute to the loss of protective properties of the composition.

Specialist recommendation

If a hard film has formed on the surface during long-term storage, it must be removed before use.

Primer consumption

Primer GF-021, the consumption of which you should know before purchasing the product, can be applied in a layer of different thicknesses. For one square meter, you may need from 60 to 100 grams of the composition. A wide spread is also explained by different methods of applying the mixture. As for the layer thickness, this parameter can vary within 15 to 20 microns. Before deciding how much paint primer will be needed for work, you should decide which application technology will be used. This can be lubrication, dipping and spraying. The latter technique can be carried out by airless or air method. As for lubrication, it can be done with a roller or brush. The use of a certain tool will affect the consumption.

Tricks to use

In order to achieve a reduction in the consumption of the primer, it should be diluted before application with mineral spirits. In particular, this approach is relevant when spraying onto a metal surface. To carry out these manipulations, xylene or solvent can be used. If you decide to use the last two substances, then it is important to adhere to a 1: 1 ratio. Whereas the total volume of dissolved substances should not be more than 1/4 of the original composition. It's rightfor primers of all manufacturers.

Conclusion

GF-021 is considered today one of the most popular paints and varnishes. The popularity of this product is due to its versatility, since the composition can be used for both internal and external work. It is also important that the cost of the goods is quite affordable, which indicates the possibility of using the mixture by private craftsmen.