During renovation work, you should be very careful at every stage, especially when preparing the walls before finishing. As a rule, a deep penetration primer is used for this, which is necessary to improve the adhesion of the wall to the finishing coating. In addition, the soil can perform other important functions necessary for the strength and high-quality completion of the repair..
One of the best for achieving this goal is acrylic primer, which has many advantages over all other types..
What it is?
The walls of the premises being repaired differ in texture and material; they can be wooden, concrete, plaster and others. Each material has a certain set of properties that are different from the other, respectively, and the decorative finish will hold differently everywhere. To make the adhesion to the wall as strong as possible, a primer is used, which penetrates into the wall and increases its strength. Primers can be universal, antiseptic, antifungal and other types. One of the best types is an acrylic primer..
Deep penetrating acrylic primer can be applied to any substrate, regardless of the material. This composition penetrates very deeply into the surface – by about 10-15 millimeters, it can be used both for walls and ceilings. In addition to its versatility, an acrylic primer for interior use can also have antiseptic properties, which is why it is suitable for rooms with high humidity..
Outwardly, this tool looks like a white liquid with a dispersion of 0.05-0.15 microns. Drying time is no more than 40 minutes. Product consumption varies between 80-200 grams per square meter depending on the surface material.
Features and Benefits
The main purpose of the soil mixture is to increase the level of adhesion of the wall to the finish. At the same time, the vapor permeability of the base does not decrease, since after hardening the mixture forms a thin lattice capable of “breathing”. Such a lattice is also a framework that keeps surface particles from crumbling. In addition to everything, the soil mixture has the property of reducing the porosity of the walls, which allows increasing the strength and saving on the use of finishing.
An important advantage of the primer is the protection of the wall from dirt and destruction by harmful microorganisms.. As a rule, only those materials that do not have a loose texture (concrete, plaster, gypsum, etc.) are treated with a primer. Acrylic compounds penetrate to the maximum possible depth of the surface, this is their great advantage over other types. Such properties are possible thanks to aqueous solutions, which are used instead of special substances that form a film..
Acrylic-based dispersions have a very small micelle diameter, and the smaller the particles, the deeper they can penetrate the surface, thereby strengthening it. Even the smallest parts of the base will be glued and secured, thereby preventing shedding.
Another advantage of the soil mixture is a decrease in the absorbency of the surface, which allows you to save on decorative materials and finishes in the future. Acrylic primers that penetrate the inside of the wall not only dry quickly themselves, but also contribute to faster hardening of subsequent layers of paint or other mixtures applied to the surface after them.
As a rule, such compositions are used not only for wall treatment, but also for other works. Many craftsmen prefer to use them for installing linoleum, parquet or carpet tracks..
After processing the surface with a soil mixture, subsequent repair work will be less complicated and costly in terms of time and money. Pre-primer application ensures that the parquet does not come loose.
How to choose
Before buying and using an acrylic primer mixture, you should pay attention to some details that will not only help with the choice, but also prevent mistakes. First of all, you need to decide on the task assigned to the product. If you need to strengthen the surface, then first it is recommended to find out the level of its porosity.
Before starting work, you need to determine the viscosity of the dispersion.. To check, apply a little primer on a dry surface. If the solution is absorbed within half an hour, it can be concluded that the wall is low-porous, respectively, the use of such soil may be ineffective. If the droplet is absorbed in just ten minutes, we can assume that the right mixture has been selected..
Unfortunately, you cannot carry out such tests in a store, so you will have to rely on the advice of the employees of the construction hypermarket..
The next factor influencing the determination of the optimal properties of acrylic primer is the size of the particles of primer polymer inside. The smaller they are, the deeper and better the mixture will penetrate, and the less composition will have to be consumed per unit area..
Thanks to the correctly chosen purchase, the initial vapor permeability of the base is preserved and the consumption of decorative coating is reduced. There are times when acrylic paints diluted with a special solvent are used instead of acrylic primer mixture. Most often this happens during interior work, but they can also be used for exterior decoration, however, with one condition: the base treated in this way should not be exposed to moisture for five hours.
When working with a certain base, an important factor is the acidity index, which is always indicated in the technical characteristics of the composition. The higher it is, the less recommended this composition is for use on old substrates with salt stains..
Acrylic primers of deep penetration with high acidity are undesirable for outdoor use. Most often, such mixtures are used for the repair of interiors..
Deep penetration acrylic soil mixtures should be applied in a special way, having previously examined the surface for cracks or cracks. If too large holes are found, the diameter of which exceeds one and a half millimeters, it is advisable to seal them up with putty, since they will not only increase the consumption of the solution, but also adversely affect the vapor-permeable properties of the base. After checking, it is recommended to immediately clean the wall from traces of rust, since with an increased acidity of the composition, even a small percentage of rust can cause an unnecessary chemical reaction.
This point is especially important if the repair takes place in rooms with constant fluctuations in moisture levels, where the risk of rust formation is increased..
It is also important to determine the texture of the surface, since the level of consumption of the composition depends on this. If, when working out conventional materials, the mixture will be consumed at about 80 g / m2, then in the case of impregnation of highly porous surfaces, the consumption will be much higher.
In the latter case, it is allowed to slightly dilute the soil mixture with water (by 9-14% of the total mass), which will increase the possibility of its deep penetration.
For better application of acrylic compounds, professional craftsmen recommend using a roller, as it provides a more uniform and faster application. Wait twelve to twenty four hours before recoating. The longer this time period, the better, since surface hardening does not guarantee complete drying of the applied composition. Particles that penetrate into the processed material continue their work on strengthening the walls for a long period of time. That is why manufacturers, wishing to play it safe once again, prescribe in the technical specifications the maximum waiting time for the first layer to be ready for thin substrates, and the minimum – for bulky substrates..
The properties of soil compositions also indicate the maximum size of particles that are not removed from the pile when using a brush or roller. Very often, the residual soil layer, which has not been absorbed into the substrate, remains on the tool and then falls on other materials. It is then quite difficult to remove it, which is why it is recommended to keep a small plywood or chipboard sheet next to the container for the mixture, so that you can draw it with an application tool before the next use. Only after the complete removal of the residual mass will it be possible to dip the roller again into the container with the composition.
Professional masters do not recommend using aerosols or spray guns when working with acrylic primers with deep penetration, as they are very wasteful.
Review of popular brands
The Optimist composition is a mixture with antiseptic additives. It is produced in cans of 10 liters at a price of 600 rubles, which is very democratic. Consumption is 150-250 ml / m2. Application temperature – from 5 to 35 degrees. The composition dries up in two hours, which will help reduce the duration of repair work. Among the advantages of the primer is the prevention of mold. The only drawback of this mixture is an unpleasant smell..
Acrylic primer mix “Lakra” is also available in a volume of 10 liters, but it costs 1000 rubles. The consumption level varies from 50 to 100 g / m2, the solution penetrates to a depth of 1-5 millimeters. The primer dries up within 3 hours. The mixture has no toxic odor.
For even more information on how to prime correctly, see the next video..