Before starting work related to the surface finishing of buildings made of concrete, they need to be primed, for which various types of primers are used.
Primer for concrete and plaster: purpose
The main purpose of using the primer is to strengthen the base, as well as its protection from various negative atmospheric influences. The cost of this material is low, despite the fact that it performs an important function.
The advantages of using a primer
As the positive sides of the priming material, according to user reviews, the following can be distinguished:
- the property of the processed surface remains unchanged;
- the service life of the base is extended;
- during the repair, the base and finishing materials are fastened stronger;
- the primer on concrete performs the function of an insulator, eliminating the possibility of contacting inappropriate materials.
Recommendations : some types of primers can be used as a material that is suitable for the final stage in surface finishing.
Foundation preparation
The surface during which concrete of the appropriate quality was used is characterized by a finely dispersed structure, due to which it is characterized by perfect smoothness (for example, ceilings made of concrete slabs, as well as panel houses). However, it should be noted that on a similar basis there is simply nothing to cling to with glue and putty, they do not fit well.
Eventually:
- Wallpaper quickly begins to peel off;
- putty is peeling;
- cracks appear on the plaster.
If the finish is carried out by highly qualified specialists, then even before the start of repair work, they determine the characteristics of the surfaces.
If the previous finish has a large number of various kinds of damage, then this indicates that the walls have not undergone the necessary treatment, preliminary preparatory work has not been carried out, which includes cleaning the surface and priming on concrete.
Steps for surface cleaning and priming
1. Before applying a primer to the base, it is recommended to clean it from the previous coating with your own hands, where, most likely, unnecessary dust has accumulated.
2. All existing defects (cracks, bumps) on the surface must be completely eliminated.
3. Next, a deep penetration primer for concrete should be applied to the base, which will help strengthen the damaged areas.
4. After completing the above steps, the base should be leveled.
Before painting the walls, they are also recommended to be prepared. A deep penetration primer for concrete is also used for this .
Recommendations : in order to protect the surface from microorganisms that can cause harm, a primer should be used, which contains an antiseptic. It is used in the processing of external walls of buildings, as well as in rooms with a high level of moisture.
Priming
When applying this material, you must use a roller or brush.
In addition, do not forget about the recommendations for the consumption of funds that are on the package:
- Due to its properties, the surface is not able to absorb the amount of primer, more than the designated volume. Excess material will simply dry without any benefit.
- If the primer is applied less than the required amount, then this will also not be of any use, since it will not penetrate the base, and accordingly, will not be able to strengthen it.
Recommendations : before applying a primer, work on the base and walls should be completed.
Varieties of primer
The material is intended for processing internal and external surfaces. Primer for concrete for outdoor use with the same success can be used for indoor. However, due to the fact that the composition includes components that are dangerous for the respiratory system, after using it, it is necessary to properly ventilate the room.
The following varieties exist:
- Reinforced concrete primer with deep penetration.
- Textured, which include fillers. Are applied during the subsequent work with surfaces (for example, an acrylic primer on concrete).
- Isolating. Protect from the adverse effects of climatic conditions, chemicals, mechanical stresses (these include silicone, polyurethane and epoxy primers for concrete).
- Primers containing antiseptics: protect against mold and fungus.
Depending on the type of surface, the primers are divided into:
- Primers designed for a smooth surface (they perform the function of protection against moisture, are used for painting or plastering).
- Primers designed for cellular concrete (characterized by good viscosity, they include silicate fillers designed to fill pores). They are well absorbed, but weakly strengthen concrete.
The instructions on the packaging of the material indicate for which surface the primer for concrete is intended - for outdoor use or for indoor use.
Expert Advice
When choosing soil:
1. It is necessary to identify what the composition is needed for (for preparing the surface for plastering or painting, for waterproofing).
2. You should know what material the base is made of (fresh concrete or old, dense or cellular). Based on this, you should choose a primer with the appropriate characteristics.
3. It is necessary to calculate the consumption of the primer.
Recommendations : it must be remembered that the composition is not able to strengthen concrete, therefore it should not be added to the solution.
The maximum penetration depth is 70 mm, while a protective layer is created. This material, like a bumper, takes all the blow on itself, performing the function of protecting the base.
The base treated with a primer will retain its properties much longer and better. But if this material is added to the solution, it will not become stronger without the use of additives specially designed for this purpose.
Recommendations : unreasonable use of soil in concrete can reduce strength characteristics.
In order to add special components to the concrete solution that can enhance its strength, it is necessary to have a special construction or engineering education.
Conclusion
The priming of surfaces made of concrete allows them to be used for subsequent finishing work, and also helps to strengthen them, protects against fungus. Before acquiring the necessary material, it is necessary to find out the structure of the base, which will help to prepare it in the best way.
Primer for concrete, the price of which is from 450 rubles, is a high-quality and environmentally friendly material without a specific smell. It is sold in various containers and has various packaging.