It is known that to give greater resistance to the paint coating, construction specialists use a primer. The modern market of building materials will present a wide selection of products of the type in question, in the total number of which there is a separate type intended for coating metal surfaces (GF-021). Further we consider its main features, as well as some characteristics.
What is the material for?
Assessing the technical characteristics and consumption of the primer GF-021 per 1 m2 of metal, first of all, attention should be paid to the purpose of the product in question. Like any other similar material, the primer GF-021 is designed to improve adhesion between the surface and the coloring agent. Moreover, this material performs a protective function, preventing the negative impact of water on the treated surface, corrosion, as well as the appearance of various biological formations.
The considered type of building material is intended for processing not only metal surfaces, but also plastic, as well as plywood and wood, with varying degrees of relief.
Specifications
The certificate of conformity on GF-021 indicates certain technical characteristics that the material in question must comply with. They indicate that a normal product made in accordance with GOST should have a viscosity equal to at least 45, and the grinding level of a high-quality primer should not exceed 40 microns. The product may contain no more than 55-60 mass non-volatile components.
Diluting the primer GF-021 can be done solely on the basis of adding no more than 20% of the liquid of the total weight of the material taken.
In the type of material under consideration, slight delamination of the product is allowed - up to 5% of its total mass.
As for the adhesion characteristics characteristic of the GF-021 primer, they are decent - 1 point is assigned to this product.
Consumption GF-021 for metal per 1 m2
Speaking about the features of the expenditure of the building material in question, it should be noted that after applying the solution there remains a very thin (up to 1 mm thick) layer, which has high strength indicators. Practice shows that under normal environmental conditions, which are, first of all, in positive temperature, the applied layer can dry in a minimum amount of time - 50-60 minutes.
Speaking about the consumption of GF-021 per 1 m2 for metal, it should be noted that covering this area will require from 60 to 100 g of product, depending on what kind of surface treatment is planned.
In order to apply the product, you can use both mechanical and manual methods. Specialists in the field of construction recommend using it manually, justifying it with the fact that in this case, the consumption of GF-021 for metal per 1 m2 will be much less. You should not do this with a roller that absorbs most of the material.
The considered type of primer leaves behind a thin opaque layer of a matte or semi-gloss coating, characterized by uniformity.
Material advantages
Like all other types of building materials, the primer GF-021 has a number of positive and negative qualities. Let us consider them in more detail below.
Among the positive characteristics of the product in question is the fact that it is in an affordable price category - the average cost of the material is about 100 rubles. It should be noted that at this price, the Russian product is in no way inferior to foreign counterparts.
A positive quality is also the fact that it contributes to a significant increase in the adhesive qualities of the base in the case of its further coating with paints and varnishes.
Specialists in the field of construction often note that a significant advantage of the GF-021 primer is the ease of its application to the surface. Moreover, they note the versatility of using the product - it can be applied both indoors and outdoors.
Speaking about the consumption of GF-021 for metal per 1 m2, it should be noted that the material is quite economical - to cover the indicated surface area, you need to use about 60-100 g of the product.
Material cons
Speaking about the negative qualities of the product in question, it is worth paying attention to the fact that the operational period of its use is usually less than that indicated on the packaging of the material. In addition, the fact that in the case of applying it with a thick layer, complete drying can be expected no earlier than in a day is one of the minuses of the product.
Primer GF-021 does not tolerate sudden temperature changes, as well as its negative indicators. This is another negative point. In violation of the temperature balance, the coating begins to delaminate and loses its positive properties.
In the comments of experts in the field of construction, it is often noted that the material in question is not characterized by penetration, which is also a big minus of the product.
How to apply a primer
In order to get a high-quality coating, it is necessary to take into account all the subtleties of applying the material, which we will discuss in more detail below.
Before applying the coating, it is necessary to clean the surface of excess elements and allow it to dry. After this, the base must be covered with the prepared solution, applying it in one layer, using a roller, brush or a special spray gun.
Next, the surface must be allowed to dry at a temperature not lower than +20 degrees. During this period, it is advisable to regularly ventilate the room - the only way to properly ensure the main purpose of the primer GF-021.
On 1m2 of a complex surface, about 120 ml of the prepared solution will be required, prepared in strict accordance with the established requirements.
How to store primer GF-021
The building material in question must be stored in the right conditions - this will ensure its suitability for use in the foreseeable future.
The average shelf life of this type of building material is about 8 months. This indicator directly depends on the components that make up the product. The suspension contained in the container provided by the manufacturer must be carefully protected from exposure to sunlight, as well as from excessively high and low temperatures. Moreover, after opening the container, it must immediately be diluted with a previously prepared solvent, which is ideally suited to xylenes, solvents, as well as mixtures with the addition of white spirit.