Painting walls is one of the most popular types of decoration. In order not to have to do repairs annually, you need to make sure that the coating is well kept and retains a fresh pristine appearance. It is for this that before painting the walls are primed.
Why is the surface primed?
The main objective of the primer is to prepare the wall surface for further application of various finishing materials, including paintwork.
- Primer can significantly save on paint, because by improving the adhesive properties of the surface, its consumption is significantly reduced.
- The primer for walls for painting (the price may be different) increases the strength of the surface and protects it from moisture.
- Priming avoids the appearance of fungus, mold and other harmful bacteria, which, of course, is an undeniable plus. Wall treatment will not only help prevent this, but it will also relieve an existing problem.
- The primer can protect the surface from stains.
What primer to choose for walls for painting?
The range of such products is great. Today, modern manufacturers offer their customers a wide variety of primers for walls for painting, differing in their characteristics and purpose.
Depending on the scope of the composition, several varieties can be distinguished:
- Alkyd primers for walls for painting. They are mainly used for processing wooden substrates or metal structures.
- Acrylic compounds. This is a universal material, therefore it is suitable for processing any surface. This type of primer is able to penetrate 1 cm deep. Therefore, it is used for deep soaking of the base.
- Aluminum. Can only be used on wooden surfaces. Such compositions completely protect the wood from moisture, preventing the formation of mold and fungi.
- Polyvinyl acetate primers for walls for painting. They are used before painting with certain types of paint, as well as for concrete, wood or plastered surfaces.
- Silicate compounds. It can be used for processing brick walls, concrete surfaces or decorative plaster. Such a primer is deeply absorbed into the pores and cracks of the base, clogging them.
- Epoxy Used indoors to cover concrete walls.
Which primer is better?
When choosing which primer for painting walls is better, it is first of all recommended to decide on what type of surface will be processed, since buying the wrong composition can damage the coating. It is important to read the instructions for the product. If necessary, you can consult with the seller who will help you choose the most suitable option. In addition, it is advisable to pay attention to the manufacturer of the goods, the cost of the material and its technical characteristics. The deeper the level of penetration of the primer into the base, the better.
Primer for walls for painting with water-based paint. Reviews about the compositions
Water-based paint is considered the most harmless and quick-drying coating. It can have any color, which is obtained by adding coloring pigments to the white mass.
Under water-based paint, an acrylic or polymer primer is mainly used.
Polymer primer
The polymer base includes polyvinyl dispersion, silica sand, marble and dolomite flour. This type of primer for walls for painting with water-based paint does not contain harmful and volatile substances. In addition, it has high protective properties.
Among the disadvantages can be identified a short life and in the preparation of a fairly large formation of foam.
Acrylic primer
Such a primer is considered the most common and universal. It is used for various preparatory work and final surface finishing, including the use of water-based paint. It is suitable for processing the following surfaces:
- plasters;
- brick foundations;
- porous mineral surface;
- plasterboard coated substrates.
Finishing surfaces with an acrylic primer will allow you to apply paint qualitatively and evenly distribute it. However, it is important to consider that such a solution cannot be used to treat a smooth and glossy surface. In addition, if there was mold or fungus on the material, then before processing with an acrylic solution, it is necessary to treat the base with an antibacterial mixture.
Before work, the acrylic primer can be diluted with water in a ratio of 1: 3 Remember that processing should be carried out only on a clean and dry wall.
Varieties of Acrylic Primer
Acrylic primers, in turn, are classified depending on the purpose of the primer and the conditions of use.
- Deep penetration. Such a tool is able to penetrate deep into the base by almost 10 cm, while aligning it. This ensures minimal paint consumption.
- Universal. The tool improves adhesion, significantly improves the impregnation and has high moisture resistance.
- Impregnating primer for walls for painting with water-based paint.
- Special. It is used in special cases, for example, to increase the resistance of the surface to mold and fungi. Also, a special primer can be used to treat metal surfaces to improve corrosion resistance. Under water-based paint, such compositions are rarely used.
- Adhesive. Improves adhesion of a surface to finishing material. Most often used on poorly absorbent and rough substrates.
Preparation for painting and necessary tools
The method of applying the primer is universal and does not differ from the application of other finishing materials. Before applying the composition, the surface must be well cleaned of the old coating, cleaned, sanded and degreased. The number of primer layers individually, but not less than 2 times. The following tools will be needed for coating:
- capacity;
- brush;
- roller;
- spray gun.
For each individual case and a specific task, different tools may be needed. For example, it is more convenient to apply the composition to a brick wall with a brush, and for a flat surface or for drywall walls, it is best to use a roller. The spray gun is also an excellent tool for priming, but it is used much less often, since it is difficult to wash the room after processing.
How does priming walls for painting
Priming the surface before painting (water-based or any other paint) is an obligatory step. It is best to use a universal composition for this type of work. This type of primer has all the necessary properties and is great for treating any surfaces.
The primer for walls for painting (the price may be different) is applied in a certain sequence:
- the first layer is applied to the surface;
- the base is putty;
- a second coat of primer is applied.
A little solution is poured into the pan. The roller is rolled over the tank, all excess composition is removed. Work must be done carefully. Primer consumption is calculated as follows: 150 ml per 1 m2. After the layer is applied, it is advisable to wait 30-40 minutes to understand the level of absorption of the surface, as well as how many layers need to be done.
Wall painting with water-based paint can only begin after the composition has completely dried.