How to prime the walls before painting and what is used for this
Primer formulations are designed to increase the adhesion (adhesion) of the decorative type of finish to the surface for more durable fixings. Moreover, priming will reduce the absorbency of the walls, which will reduce the consumption of paint and varnish material. Next, you will learn about the work, how to prime the walls before painting various types of surfaces.
Primer before painting. The process of applying a primer will precede painting and is a very important stage in preparing for wall surface finishing.
The solution will be designed to protect, strengthen and level the surface, and also improves the further adhesion of finishing materials. Moreover, the special primer mixture is able to provide protection against fungi and mold.
Primer is the process of applying a special stave on the surface of the walls, which takes place before the start of finishing work. Prime walls for painting, wallpaper, ceramic tiles and decorative plaster.
The priming process can be carried out with different compositions - paint, which is ready with a primer or concentrate, which is diluted according to the instructions.
More solutions will be marked relative to the surface to which they will be applied (metal, wood or plaster).
Such paint as water emulsion is far from the cheapest finishing material, and therefore preliminary priming of the walls makes it possible to significantly save on the consumption of paint and varnish material. The primer, which is applied under the water-based paint, reduces the hygroscopicity of the base, and this leads to a more even distribution of the paint and varnish material on the surface, and also increases the strength of the coating and increases the wear period. The primer under the water emulsion is applied with a brush, preferably in one layer, which should ideally cover all the unevenness of the walls, but at the same time not create uneven accumulations of the primer. After perfect drying of the primer, which takes 5 to 7 hours, the water-based paint should be applied in two layers.
Silicate-type paints are sold in dry form, for dyeing mixtures it should be diluted with water and applied in a short time until the paint has lost its properties. For this reason, silicate-based precoating is incredibly important for speed and quality. Special formulations of the primer make it possible to reduce the toxicity of alkalis contained in silicate-type paints, as well as to strengthen mineral surfaces to increase the life of the paint up to 15 years.
Priming before using acrylic paint has an incredibly important feature - the composition should be applied to highly abrasive surfaces, because from smooth will gradually begin to creep even with paint. For this reason, before applying the primer, the surface of the walls should be treated with a stiff brush or coarse sandpaper in order to artificially create grooves and roughness.
In turn, the priming solution perfectly fixes the particles of the coating, and also evens out the adhesive properties and absorbency of the wall surface, which will enable the acrylic paint to lay down evenly, with a durable layer.
Oil-type paint is one of the best in adhesion, even without applying a preliminary layer of primer. It is this process that will increase the strength of the oil-type coating, and make it smoother, less porous. But often oil paint, which is applied without a primer, will itself act as an unsurpassed material for finishing work, as it adheres perfectly to the surface. When initially applying oil paint, it is not necessary to prime the walls before painting.
When recoating, it is worth making a choice in favor of a special "over paint" composition, which will make it possible to save the time needed to remove the old layer.
How to prime walls, if you haven't decided on the composition yet? There are the following:
It is possible to strengthen and protect surfaces made of concrete, wood, ceramics, putty and plaster with a universal type of primer, which is made on an acrylic base.
The application process can be done in the preparatory and main stages:
- During preparation, sand the surface, remove dirt, dust and mold from it. If necessary, which can be dictated by the instructions for the primer, the wall should be degreased - for this, acetone or other solvents are used.
During the preparatory work, proper ventilation of the premises and the temperature regime should be observed in the range from +5 to +25 degrees.
- The main priming step will be to dilute the required amount of the composition and apply it to the surface of the walls.
How many times
Usually the primer is applied in a couple of layers, and the first must be thick, and the second is required for ideal strengthening of surfaces. At the same time, it is important to dry each layer of primer at the time recommended on the package (usually several hours).
Depending on the porosity of the wall can be primed with a roller or brush.
Each method has its own advantages. The brush makes it possible to work on unplastered surfaces, while the roller will give a uniform layer without smudges, which will require less product.
How long can it take to paint
The minimum drying time for a primer should be found in the instructions for a particular composition, and usually it is from 4 hours. If the repair work makes it possible, then it will not be superfluous to allow the product to be absorbed within 24 hours. Moreover, if the primer was applied to the surface of plaster or putty, then further painting should be carried out after all the finishing layers have dried perfectly.
Drying of primers can slow down the open containers in the room that are filled with water, and therefore it is worth removing buckets of water, the remnants of the diluted primer and other liquids from the room.
Is it possible to paint the walls without priming
If we prime the walls for painting, it means that we follow all the finishing rules, but sometimes they can be neglected.
When is it possible
When it is impossible
- A primer is required when pasting wallpaper for reliable adhesion to the wall surface.
- When using drywall in decoration - the sheets will be coated twice (after installation work, and after the paint has dried for its better adhesion).
- When repainting an old paint coat with a new color, in which case the primer will make it possible to neutralize the transmission of the old finish.
And now some advice from experts.
The basis for a high-quality result of finishing work is the use of funds from one manufacturer.This helps to avoid unpredictable chemical reactions of different compositions, and moreover, the lines of products from the same company are designed for combined use, which will make it possible to obtain the planned shade and coverage of the structure.
Mandatory for implementation is the principle of a stronger base in relation to the paint applied coating. This will mean that the primer layer should take on the functions of leveling and adhesion to the walls, and the selected paint will only have a decorative function.
Often beginners who do not know whether a primer is necessary for professional help often turn to professional help. To identify the need to use primers, professionals conduct a very simple test - you should rub the walls with your finger (if there is a trace, then you cannot do without a primer before painting).
Primer on each surface prior to painting is a step that works to facilitate future finishing work.
Modern priming compounds are ways to strengthen the walls, protect it from destruction, the appearance of chips, cracks and rust. After applying the product, the layer of paint and varnish material will be distributed much better, which will make it possible to reduce the consumption of paint coatings.
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Posted By: Work Style |01, Nov 2020
Posted By: Work Style |11, Nov 2020
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Posted By: Work Style |01, Nov 2020
Posted By: Work Style |11, Nov 2020