For each type of base, wood, concrete or metal, finishing materials of a certain type are suitable. This also applies directly to priming materials - for each type of surface, a special composition suitable for it is required.
For loose and porous substrates, use a special agent called a deep penetration primer.
People who have little knowledge in construction and repair work, the question arises - what is it for? For what purpose is it used, and why cannot we do without it? The application of a primer is a necessary step, it is a special preparation of the base before painting or filling.
We can say that the primer is a kind of substance that reliably binds the components of the surface and finishing materials.
Its use allows you to smooth out irregularities, improves adhesion, ensuring uniform application of the decorative coating.
The deep penetration primer contains particles of acrylic polymers capable of strengthening weak and loose substrates.
In other words, it reduces their ability to absorb, significantly strengthening the surface layer, thereby reducing the potential consumption of finishing agent. The processing of her capricious walls ensures the quality of their subsequent finishing work.
In what cases is it recommended to use a primer paint? It is necessary for use on walls outside and inside the premises, which are planned for wallpapering, painting, putty, tiling.
The tool is excellent for brick, aerated concrete, plasterboard and foam concrete bases.
You cannot do without it when using such building materials as plaster, various types of porous concrete. It is not recommended to use primer painting on various poorly absorbent substrates, steel surfaces, or those with residues of grease and bitumen coatings.
What qualities and properties does this substance have?
More specific primer specifications vary from manufacturer to brand. The size of individual mini-particles of the product, its ph level and other characteristics may vary. Primers "Knauf", "Moment", "Ceresit" and others are especially popular.
They can be produced as a dry mix, or they can be ready-to-use.
V the sale presents both special compositions intended for certain types of surfaces (for example, a primer for metal), and a universal primer, suitable for several types at once. How can you find out which product is suitable for a particular case? The composition of the material, or rather, the binder used in it, will help to understand this. There is an epoxy primer, acrylic, perchlorovinyl, alkyd and other types.
They are excellent for a wide variety of surfaces: asbestos cement, plaster, chipboard, concrete, brick and wood.
They are often applied before water-borne formulations such as varnish, glue or acrylic paint. They fill the pores of the base itself, thereby reducing the consumption of finishing products.
It is impractical to use them for smooth surfaces. They are also not used for metal surfaces due to the lack of anti-corrosion qualities. This primer paint does not have a strong odor, dries quickly!
The consumption of the primer is quite economical and ranges from 100 to 200 grams per m2!
Alkyd products include alkyd resins.
They are successfully used for processing all types of wood, including chipboard, fiberboard, before coating them with various enamels and paints.
The agent penetrates deep into the wood layers, filling the pores of the rock, preventing swelling and shrinkage of the material. On substrates such as ceramics, PVC, tiles and glass (without pores), this compound forms a film that increases adhesion.
It can also be used for many types of metal such as aluminum, galvanized steel. Such a deep primer dries up to one day.
Mineral primers are products formed by an aqueous dispersion of mineral fillers and polymers. They are intended for surface treatment of concrete, expanded clay concrete, gypsum, brick, cement-sand and limestone bases.
Possessing special characteristics, they remove dust and strengthen the surface to be treated, improve its adhesive qualities, preparing it for the application of the topcoat.
The role of the mineral component in them is played by gypsum, lime, quartz sand or cement, on the basis of which, in accordance with the type of surface to be treated, a suitable primer is selected. They are odorless, dry quickly and colorless.
This type includes, for example, a Ceresit primer.
The base for applying the primer must be carefully prepared. The metal surface is cleaned of rust, slag is removed from it . Wooden surfaces are leveled, cracks are putty on them, and burrs are removed. If they have all kinds of grease stains, they are washed off with special solutions to get a clean, dry and even base.
The mixture is prepared according to the recipe written on the package. The normal ratio of composition to water is one to one.
It is applied by hand using a roller, brush or spray gun. The indicators of humidity and temperature when using the product must correspond to the specified conditions.
The recommended temperature for work is from five to thirty degrees.
All activities are carried out in protective equipment.
Rubber gloves required. Take care not to get the substance in your eyes. The composition must be applied in a thin, even layer.
On a porous, highly absorbent surface, it is applied in a double layer.
Small items can be dipped directly into the container with the product.
Different types of primer dry at different times. This period depends on factors such as t and ambient humidity, but, in any case, the process takes at least a day.
Further surface finishing is allowed only after final drying. If the priming was carried out carelessly: the product was not selected correctly, or the technology was not followed, later this may manifest itself as peeling of the paint or the appearance of bubbles on it.
Posted By: Work Style |05, Nov 2020
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