When repairing the walls it is impossible to achieve the perfect result, if not to prepare the surface. So that the wallpaper or new paint lay smoothly and beautifully, without high defects, from the walls must be removed the previous coating. And if you remove the old wallpaper is not so difficult, then with the paint you will have to tinker. In this article we will describe how to remove paint from the walls with a chemical method.

Is it worth removing old paint

Not so long ago, during the Soviet Union, the most popular view of the inner decoration of the walls were their staining. Wallpapers at that time were not cheap, and they were not as attractive and high-quality, as their modern analogues. But the paint was always available, simply applied and held on the walls for many years.

Paint performed not only decorative, but also practical function. It covered the base is durable, often a waterproof layer, providing its hygiene. Years passed, and this type of registration has lost its relevance. Now the woven oil paint looks outdated and completely unattractive, but to decorate the premises with other types of coatings, you will have to clean the walls from paint, and it is not so easy to do it.

Since it is not so easy to remove the old oil paint from the walls, you must first decide whether it is worth it to remove such a coating at all. The answer to this question lies in what the material you choose to further finish. For example, if you plan to install plasterboard sheets on the wall or want to arrange the surface with plaster, there is no need to remove the paint. But if you want to paint the walls, stick wallpaper on them or put the tile, the old coating will have to be removed.

Chemical cleaning of walls at home with the involvement of specialists can do it quite somehow, but if your budget is limited, all the work on the elimination of paint you are quite capable of performing yourself.

Methods of cleaning walls from paint

There are several methods for removing old paint from the walls:

1. The thermal method provides for the use of a special heating device - a construction dryer. Thus, the hair dryer affects a certain area of \u200b\u200bthe surface, heated it. The paint in the heating process softens, after which it can be written with a spatula or other suitable tool. The thermal method is quite effective, it allows you to qualitatively remove the coating from the walls. But there is in it and disadvantages - when heated, the paint can be distinguished toxic substances that enter the air and adversely affect humans. In addition, working with a construction hairdryer is unsafe, with inactive circulation, you can get strong burns.
2. The mechanical method is the elimination of old paint with the help of abrasives and various tools. In this process, only human physical forces are involved. The mechanical method is not too effective, requires large labor costs and time spending.
3. The chemical method of cleaning the walls involves the use of special solvents or other chemicals. They are applied to the working surface at a certain time, while the paint does not enter the response with the solvent. After that, the coating is removed. Chemical cleaning is more efficient than dry mechanical, but also requires a special approach. In the process of work, it is important to adhere to the safety rules, since solvents are quite harmful to human health.

Description of the chemical method of cleaning walls from paint

For the implementation of the chemical method, various substances are applied, this method itself involves careful safety observance. The fact is that in the process of dissolution, many species of paints begin to extract toxins into the air, and the solvents themselves are unsafe for the respiratory tract. That is why the employee must be protected by a respirator, gloves and glasses, as well as overalls.

All types of compounds for chemical cleaning of walls can be divided into 2 large groups:

• alkaline substances;
• organic solvents.

Many manufacturers in the description of their products declare that their goods are very easy to use and extraordinarily effective. Nevertheless, as practice shows, it is not so easy to work with the solvent. Firstly, one application of the composition on the wall is most often not enough. The reagent dissolves only the top layer of paint, the lower remains intact. Therefore, in order to achieve the desired result, the wall will have to handle and clean several times until all the paint is removed.

After spraying the substance on the surface, it should be left for some time until the coating takes into a solvent reaction. Only after that the paint can be removed. This is often done by a simple spatula, which easily removes the softened material from the wall.

When choosing a solution for chemical cleaning, it is worth considering both the composition of the paint and the type of surface. The simplest in the removal is the chalk paint, which is washed off by ordinary water. We can also use warm water for water makeup, and you can purchase a special wash, which is sold in most building stores. Oil paint remove harder. It is best to take a 40% sodium hydroxide solution. Acrylic coatings also remove with special washes.

When cleaning the walls, it is necessary to take into account the surface type, because those substances that are safe for metal or stone can dissolve plastic. Define an instruction will help you determine the choice of composition. Fortunately, the packaging always contains information about what surfaces one or another solvent is suitable.

Types of paint washes

The cost of cleaning 1 m² of brick walls or surfaces from another material is very high, and to save money, you can buy a wash and remove the coating itself. We will deal with more details with the range of products presented in the market.

Almost all the washes for paint and plaster are made on the basis of organic solvents: acetone, turpentar, benzene, etc. In addition to the solvent, acids are present in the wash, for example, acetic or ant, as well as thickeners and evaporation moderators. In the quality of the thickener, naphthalene or some other oily substance performs, and the paraffin prevents the rapid evaporation of the washing.

Most often, the washing is used to eliminate car paints, they remove the thick layers of any ornamental dyes. The Russian market offers such plates:

• "AVTO";
• "Washing out old paint";
• "Antikras-Universal";
• Paint Remover manufactured by the United States and others.

Each of these goods is designed for a specific type of coating. For example, the "spacing of the old paint ATP 1" is best removed by alkyd and epoxy compositions. Washing SP-6 and SP-7 are designed for polyacrylate and metamyl formaldehyde paints. "AvtoMim" perfectly copes with nithemals and metamicrylate paints.

The crumple of the Russian production "Antikras-Universal" eliminates most paints, for example, bituminous, glyphthaled, oil, latex and other paints. The same drug can be used to remove rust from metal and to protect it from corrosion. Antikras-Universal is used to dissolve primers and putty.

For cleaning oil paint, you can use the "washout of the old paint of the SD", but it is best to apply on metal surfaces.

Types of solvents for old paint

In addition to the washes, there are also solvents for old paint. The most popular option is to be methylene chloride, which is able to eliminate most of the modern paints and varnishes.

Nitroemali is best dissolved with acetone, as well as solvents No. 646 or No. 647. Lucky on a bitumen basis is easier to remove with coal xylene. Gasoline-based solvents are used for dense paints and thick varnishes, and automotive gasoline is optimally suitable for bitumen compositions.

Oil paints, nitroemali resistant AFT-1 solvent, which is applied to the surface for half an hour, after which the old coating is removed.