Deep penetration primers for concrete: overview, characteristics, selection
In modern construction, concrete is the most common material. Thanks to the production of various types of concrete, which are suitable for both exterior and interior. In this case, the surfaces need additional processing. For this purpose, deep penetration primers for concrete, which are designed to perform a variety of functions, are used.
When carrying out any kind of repair work, priming is an obligatory stage, without which it cannot be avoided. What kind of primer is suitable, is solved in each case, taking into account the characteristics of the treated surface.
Features of concrete
Concrete today is a versatile building material, the popularity of which is very large. Due to the characteristics of the material and the technology of erection of objects, you can realize the most diverse and daring ideas and design tricks.
The main feature of concrete is its affordable cost, which is low compared to other building materials. It should be noted that concrete is environmentally friendly.
The scope of application of concrete is quite wide. With its help it is possible not only to increase the level of mechanization, but also to organize the automation of technological processes. And when using a primer for concrete for exterior work, you can create any architectural and construction style.
The need for primer
Anyone who has ever repaired his apartment knows perfectly well that before plastering, painting and pastoring walls, they should be covered with a layer of primer (or maybe not just one). The same must be done before laying the flooring. But not everyone comes up with the question of why this is done.
The main task, which is assigned to the primer, is to increase the adhesion of the concrete surface with subsequent finishing materials. In addition, the mixtures provide protection against the harmful effects of a number of external factors.
The material in the already frozen state is quite durable.However, if you do not use additional tools such as a primer to strengthen the concrete, it may collapse. This can be influenced by mechanical causes. Concrete is also affected by natural external factors.
As is known, concrete is a material with high density and hardness, but at the same time it contains micropores. The porous structure has both its advantages and disadvantages. In particular, if the concrete surface is left as it is, then its pronounced absorbency leads to excessive costs of paint and varnish products.
Primer with the effect of deep penetration is a special composition that falls into the micropores. This allows you to strengthen the concrete from the inside, and with it improve the adhesive properties. As a rule, this is achieved by acrylic polymers, which some types of deep penetration primers for concrete are rich in. When they are used, along with the strengthening effect, the absorption capacity of the building material is reduced.
Priming mixtures are used for exterior or interior decoration.After surface treatment, you can apply other types of finishes:
plaster (including decorative);
wallpaper (including liquid).
At the same time the primer makes it possible to apply the subsequent finishing materials in a uniform layer. On this basis, it becomes clear that the application of such compounds is a necessary and important process.
Depending on the composition of the primer are divided into several types:
Polystyrene primer for concrete for exterior work (or internal) in everyday life is rarely used, since it is made with the addition of toxic solvents. Therefore, the scope of its application is limited mainly by the external decoration of facades or industrial premises, preferably open. Some specific types of paints require a primer on a polystyrene base. In addition, such mixtures are applied to the plastered surface before laying the tile.
Acrylic blends are widespread.And all due to the fact that they do not have a sharp smell, they are ideally combined with almost any kind of finishing material and have excellent absorbency. After applying the primer, you can proceed to further finishing in 3-4 hours. Due to the environmental friendliness of the material, a primer for concrete for interior work can be applied to the surface of any premises, including children's rooms and hospital wards. Only due to the rapid absorption and drying of acrylic compositions is not recommended to use for processing facades.
Polyvinyl acetate primer is ideal in cases where it is necessary to carry out repairs quickly. After application to the surface it dries within 30-40 minutes. Only before finishing it is necessary to carry out the treatment with white glue to improve adhesion. After that, you can start pasting wallpaper or painting.
Epoxy primer is based on resin. Often it is used when applying polyurethane flooring. After applying the composition significantly increase the wear-resistant properties of the material.
Solving the painful question of which primer deep penetration is better for concrete, you can look at alkyd mixtures.They are also popular in modern construction and are most often applied to the surface before painting work. Penetrating into the porous structure of concrete, the composition provides reliable protection of the material from moisture. Full drying takes from 12 to 15 hours.
To make the right choice of primer mixture, it is necessary to clearly understand for what purpose it will serve the purposes - for exterior work or it will be interior decoration. For the treatment of external surfaces, it is worth buying a special facade compound that dries for a long time. In outdoor environments, this is an important advantage. For the interior finish any suitable type of primer is suitable.
Another important point is the cost. Here it is better not to skimp, but to purchase expensive, but reliable products, than to “reap the benefits” of a product of dubious quality.
Fortunately, the price for a good deep penetration primer is not always high, and you can find an inexpensive option. In any case, it is better to trust the well-known and reliable manufacturer.
The construction market can be flooded with fakes that exist in almost any field of activity. First of all,pay attention to the packaging, which is always present the appropriate protection (holographic labels, stickers and others), which is only the manufacturer.
On guard of health
When buying a primer before carrying out a serious repair, you should choose the one that has antiseptic properties. And no matter what type it is, and for what types of work (exterior or interior decoration). Thanks to it on concrete surfaces the risk of emergence of a fungus or a mold is excluded.
This is especially true when the family has small children. And if for parents the price of a primer for deep penetration does not matter, then, when planning a repair in the nursery, you simply cannot do without this finishing material. After all, the fungus throws its toxins into the air. As a result, in such a room you can not only catch a cold or allergies, but also more serious diseases. And children, by virtue of the body that has not yet become stronger, are the first to suffer.
Before applying the primer, you need to carefully prepare the surface. To this end, the old finish is completely removed if possible.If there are large cracks, they must be repaired. Liquid primers are usually ready to use, dry mixtures must be pre-diluted with water. Some types of primer need constant and thorough mixing.
It is convenient to apply the composition with a roller, as it covers a large area. In difficult areas it is better to brush. For large amounts of work, you can use the spray gun. At the same time in the primer deep penetration for concrete is better to add more liquid in the amount of 5% of the total. This is done so that the mixture is not stuck in the hoses and nozzle. Manufacturers themselves give such advice.
During the application of the composition must be ensured that he lay down a uniform layer. After that, it is necessary to give the primer completely dry. Time is indicated on the packaging, but you can guess by the shade. If the base is weak and showered the whole process must be repeated.
As many experts advise, it is better to work with a primer at a positive temperature from 5 to 25 °. As for humidity, try to maintain a level of no more than 65%. Otherwise, during the surface treatment the mixture will start to foam.Polyurethane compounds are an exception.
If the concrete base is dense, then according to the advice of many experts, it is possible to use concrete-contact mix. It consists of quartz sand of fine fraction, due to which the finishing materials better adhere to the smooth surface. The composition is suitable for both exterior and interior.
When applying a deep penetration primer, its consumption will depend on the surface. As practice shows, on 1 square. m will need 80-120 grams.
During processing should observe safety precautions. Work carried out in rubber gloves and make sure that the primer does not fall into the eyes. If this could not be avoided, immediately wash them in warm water. To exclude such a case, it is better to work in glasses.
As for the cost, then the market can meet different prices. Polyurethane primer occupy a more expensive niche, ranging from 4000 rubles. Acrylic blends are more available. For example, the Optimist g101 brand is sold at a price of 300 rubles for 10 liters. The cost of KnaufTiefengrund and Ceresit CT 17 is just over 600 rubles for the same amount. The primer under the brand name "Staregeli" is sold in the area from 350 to 500 rubles for the same 10 liters.
Repair work will be inexpensive if you initially pick up the desired deep penetration primer for concrete. Such compounds not only increase the life of the surface, but also makes the subsequent finishing cheaper.