How to choose plaster: cement and gypsum mixtures. Gypsum dry mixes But nevertheless, gypsum has much more advantages

Dry plaster gypsum mix has recently entered the sales market. But she has many fans, because it is not difficult to cook, and installation is not difficult.

Today, dry gypsum plaster mixture will be considered. You will learn its composition and properties. After that, cook it with your own hands and reduce finishing costs. Instructions for manufacturing will be offered and in the video in this article you can clearly see the process of this work.

Basically, dry gypsum plaster mixture is used for interior finishing works. Gypsum plaster is used for preliminary alignment of vertical and horizontal surfaces immediately before applying the decorative finish.

Attention: At the same time, it is very important that gypsum leveling mixtures can be used only in those rooms in which the moisture level is not more than sixty percent. If this is a large room, and there is a lot of moisture in it, then it is better to use hydrophobic finishes in this case.

So:

• Before starting work, you need to take a fishing line and pull it diagonally across the application plane. So you can immediately see the deviations and calculate how much dry powder you need.
• If the layer is large, then it is best to apply construction grid which is attached to the wall. In this case, the grip will be better.
• Gypsum mixtures can be settled in a thick layer. This will not harm the durability of the finish. Therefore, with the help of such mixtures, both significant irregularities and small defects can be leveled.
• In addition, such plaster is often used not only in cases where it is necessary to eliminate the relief on certain surfaces. It is also often used to level walls with a littered level.

What is attractive

Gypsum mix dry plaster has a lot of advantages:

• The price is quite attractive, anyone can afford it;
• You can easily cook with your own hands, and it does not take much time;
• You can give almost any form of decoration;
• Finishing is well attached to any plane, in this matter it is universal;
• Allergens and toxins are completely excluded from this material., so it is absolutely safe;
• Finishing is not required, it does not need to be spent;
• It is quite light and therefore the weight of the wall will not increase much.. This is good for load-bearing walls.
• With the help of a mixture, you can mask and close up a variety of surface defects. In addition, it is also possible to form slopes or corners.

Attention: The disadvantages of this material include a low level of hydrophobicity, and, consequently, the impossibility of using plaster when finishing the facade.

The composition of the gypsum mixture

The dry gypsum plaster mixture has quite simple components:

Attention: Gypsum plaster dry mix is ​​commercially available, but if you have a large amount of work, then it is better to do it yourself. In this case, you will win 50% of the cost of the finished material.

• The main components of standard dry mixes are gypsum and light fillers. Also in their composition they contain modifying additives. The quality of the material, the level of its adhesion and many other characteristics depend on them.
• All manufacturers use different formulations components, but finished mixtures, in general, have similar properties that meet certain standards and norms.
• To make dry mixes convenient to store and use, they are supplied in special packages. Usually, gypsum finishing materials are packaged in specially designed kraft bags. One such bag weighs an average of fifteen or thirty kilograms. Most builders prefer this kind of packaging.
• Keep the mixture in a dry place. It is very important that it is well ventilated. In order for the packaging to retain its properties, microperfraction is done.
• In case the humidity warehouse exceeds the norm, the mixture becomes unusable, hardens. That is why before buying factory plaster check the quality of the purchased material.

Attention: It is very important that the mixture can be stored for six to twelve months. After this is lost important properties material. In this case, a high quality finish is not guaranteed.

If you do not have big amount funds, but you need to finish large room, then you can not spend money on its purchase, since you can cook it yourself.

Rules for the preparation of gypsum composition

Dry mix gypsum plaster is made according to certain rules:

Attention: If you make a purchase of components in winter time, then you should not do it on open trays. The composition freezes and loses its astringent properties. Also give preference to well-known manufacturers and refrain from buying unknown mixtures.

• To begin with, gypsum should be passed through a sieve and the fraction should be made homogeneous. So you get rid of lumps and debris.
• After that, the powder must be placed in a container and add water in small portions. Mix well until you get a plaster dough.
• In the composition that will turn out, you must add mortar. And mix everything thoroughly again.
• For kneading, you can use a drill with a nozzle, it will allow you to do everything quickly and the mass will turn out to be as homogeneous as possible.

Attention: I would like to note that you need to mix thoroughly, just do not mix for longer than one minute. Otherwise, the solution will lose strength. You can use the prepared solution immediately after preparation.

cooking options

A mixture of gypsum dry plaster can do in different options. There is a slightly different composition here and you need to choose the most acceptable one. Everything can be seen in the photo.

First option

To prepare a high-quality and inexpensive mixture, adhere to the following proportions:

• Building plaster - 3 - 4 bags;
• Plaster mixture, type ABS (Ecogypsum or Rotband) - 1 bag;
• Small wood sawdust - 1 bag.

There is nothing difficult in preparing the mixture:

• Those components that have been listed must be mixed in a dry state until a homogeneous mass is obtained. Then the mixture must be poured into polyethylene bags, it can be in other containers, and stored here.
• Before using the mixture, it must be diluted a small amount water. Mix well using a special mixer.
• Factory plaster mixtures contain special additives in their composition that help regulate the rate of drying of the mortar. Thanks to this, work with plaster becomes easier and more convenient.
• Sometimes it happens that a self-prepared solution sets too quickly. To prevent this from happening, add wallpaper paste to its composition.

Attention: It is very important that not every wallpaper glue can be combined with gypsum. I would like to recommend CMC glue - one of the proven options.

• You can add to the composition of the plaster slaked lime. Thereby. The material will become more plastic. Also, lime, which is used to create the solution, has bactericidal properties. Thanks to this, mold will never appear on the walls.

Second option

To prepare gypsum-chalk putty High Quality, you will need components such as a solution of wood glue (5%), determine the amount by the consistency of the glue; one kilogram of gypsum and three kilograms of chalk.

• The manufacturing process of the mixture consists of three stages. The first stage is the grinding and mixing of each component until a homogeneous mass is obtained. To do this, you can use the container. A volume of ten liters is quite suitable. And you will also need a puncher and nozzles.
• First of all, you should mix crushed gypsum and chalk. When you get a powder of a homogeneous mass, you need to add glue and mix again. You should get a mass, without pronounced seals, lumps, light gray.

Attention: I would like to note: putty prepared exactly according to the recipe will dry quickly. Therefore, glue must be added to the dry mix as a binding agent. It is better to do this before applying to the surface.

• If the mixture is prepared according to this recipe, then it should be used for finishing alignment, and not for roughing. Putty will be applied conveniently and simply (see How to putty walls with your own hands, following all the rules), if it is prepared correctly.

Third option

Thanks to this recipe, you can prepare a mixture that can be used to finish the painted surface:

• To do this, you will need: one hundred grams of NF-1 desiccant, two kilograms of gypsum and one kilogram of drying oil.
• You can use this putty when finishing oriented strand board. To speed up the drying process, in this case, you can apply a desiccant.
• In the process of preparing the mixture, chalk powder can be used instead of gypsum. The proportions are the same. Thus, the mixture will dry more slowly, moreover, it will be able to retain its original properties.

Attention: I would like to give one piece of advice. When making a plaster mortar, do not forget about personal safety equipment. Use gloves, goggles and a respirator.

Fourth option

The consistency of lime plaster is similar to ordinary plaster. The only difference is that it dries meleno. Because of this, a similar solution must be applied thin layer. In this case, it should be taken into account that each of the subsequent layers must be applied only after the previous layer has completely dried.

• To apply the solution was convenient and simple, you need to add gypsum to lime plaster. Get a lime-gypsum composition. Its layer dries on average in five minutes. In addition, his hallmark is optimal adhesion.
• To get a lime-gypsum mortar, you need to use three parts of lime mortar and one part of gypsum powder.

Acquisition finishing materials has a significant impact on the cost of repair work. You can save a lot of money if you prepare the plaster yourself. A mixture of dry gypsum plaster is not difficult to do and this will help reduce costs.

Among all existing dry building mixes, the most demanded among buyers and builders is a gypsum mix, the price of which is low, but the quality is high. This is due to its characteristics and properties. Which ones, we will consider in the following sections. We will also introduce you to the types of gypsum mixtures and the features of their application.

The composition of gypsum mixtures

The main component of all gypsum mixtures is gypsum powder, which plays the role binder. They also include various additives that are needed for:

• improving the quality of work;
• prolonging the setting time of the solution;
• increase adhesion;
• strength improvements;
• protection against fungus and mold.

Fine-grained sand acts as a filler. As you can see, the raw materials are mostly natural. This is definitely a big plus.

Types of gypsum mixtures

Dry gypsum mix, depending on the properties and purpose of use, is divided into three kinds:

• plaster putty;
• gypsum plaster;
• gypsum-based glue.

Each of them has its own scope. Dry gypsum plaster mixture is divided into several subtypes. According to the method of application, it can be manual or machine. By scope - starting and finishing. Also putty mixtures are divided into the last two subtypes.

Characteristics of gypsum mixtures

All gypsum mixtures have the following characteristics:

• they are white;
• mixtures have good elasticity;
• the compositions have good strength;
• they are able to absorb and release moisture;
• solutions are characterized by good adhesion (adhesion);
• have excellent sound and heat insulation;
• they do not ignite;
• mixtures are environmentally friendly.

Advantages and disadvantages of gypsum mixtures

Like any other construction material, dry gypsum mixes have their advantages and disadvantages.

First let's talk about pros.

• Gypsum mixtures set quickly and dry within an hour.
• The surface is quite smooth, it can even not be further processed.
• Walls and ceilings, plastered or plastered gypsum compositions, then you can paste over with wallpaper, paint or trim with any other material.
• They are easy to work with.

We also see no reason to keep silent about the shortcomings. There are few cons of the material, but still they are.

• Gypsum mixtures can only be used in rooms where the humidity does not exceed 60%.
• Such compositions are appropriate to use only for internal works.
• In the bathroom, gypsum mixture can only be used if it is well ventilated.

Features of the use of gypsum mixtures

Now we will analyze in detail what this or that type of gypsum mixture is used for.

Plaster based on gypsum. A mixture of gypsum plaster is used for plastering walls and ceilings in rooms. It can be applied both manually and by machine. The latter - allows you to perform plastering work more quickly, and the mortar will lie better. In addition, this option allows you to save plaster consumption. Walls finished with gypsum plaster do not crack or mold.

Gypsum putty. It is suitable for finishing concrete and cement bases. Such putty perfectly passes air and is not subject to cracks. The walls finished with it “breathe”, creating a favorable microclimate in the room. It is applied to the walls with a spatula, in a thin layer.

Gypsum adhesive. Good for mounting drywall sheets(GKL), gypsum tongue-and-groove plates (GWP) and other gypsum products. We remind you that, like other gypsum-based mixtures, they can only be used in rooms with a normal humidity regime. Before using such glue, the surface must be thoroughly cleaned from dust and dirt. The entire area to which the adhesive mixture will be applied must be covered with a primer. Only after 12 hours after that, you can start gluing.

How to prepare a gypsum mix?

Since all gypsum-based dry mixes have a powdery structure, they are prepared in the following way:

• First you need to take a container with a volume of 20 - 25 liters.
• Then pour the contents of the package (mixture) into it.
• After filling the composition with water.
• In the end, everything must be thoroughly mixed until smooth, so that all the lumps disperse.

That's basically the whole process. But only there are some nuances. For example, you can not overdo it with the amount of liquid. The solution will become unusable. Therefore, you should pay attention to the recommendations placed on the package, where all proportions are indicated. Depending on the type of mixture, the amount of water for its preparation is different.

What do we offer?

Gross company offers dry gypsum mixes to buy at favorable price. In our stores you will find products from leading manufacturers on Russian market. We always have a large assortment dry gypsum mixes and other materials for construction and repair. Our prices are the most affordable in the region. Contact us and see for yourself!

In our renovation with you, we settled on the fact that in the bathroom. To complete the process, it remains for us to wipe the seams and putty the ceiling. So we came to a slightly unusual variety of cement mixtures - these are polymer cement putties and polymer cement grouts.

These mixtures are similar in composition to tile adhesive- the same gray or white cement, the same cellulose thickener, polymer. But as a filler, either finely dispersed quartz sand (fractions up to 0.3 mm) or marble or limestone flour with the same particle sizes is used.

Polymer cement putties

I remind you that puttying is final alignment surfaces, with a layer of 1 mm to 1 cm, before subsequent plastering, painting, wallpapering, etc. Polymer cement putties are used as in facade works, as a finishing layer on lime-cement plasters, and when leveling surfaces inside dry and wet rooms. When working with these putties, it must be remembered that the performance of the solution based on them is 2-3 hours. In this case, the coating is quite hard - the skin must be chosen larger.

Polymer cement grouts

A variety of polymer-cement putties - grout for tile joints. Grouts are divided into white, gray and colored. White and gray are completely identical in composition. cement putties. In the production of colored cement, an inorganic pigment is introduced into white or ordinary cement. Grouts play both a decorative role in the tile coating and a protective one. Thanks to the polymer introduced into the cement, as a rule, it is a type of vinyl acetate (remember PVA glue), the grouts do not allow moisture to pass into the tile joints, thereby protecting the adhesive layer.

Grout compositions represent limitless possibilities of design imagination. The picture shows a dark brown grout, into which bronze powder was introduced during mixing. The effect is a dark brown metallic color.

White grouts can be tinted with tinting pastes, getting completely unusual colors. By the way, in the mosaic, cement-based grouts play the most important role, also acting as adhesive solution: The mortar holds the tiling map grid. Ground marble or limestone is used as a filler in grouts, as quartz can scratch the glaze of the tile.

You can use white or gray putty as a mosaic adhesive, but in this case it is necessary to add acrylic latex (or acrylic primer) to the mixing water.

Gypsum-based mixtures

These are the lightest in weight and easy-to-work formulations. Their only drawback is the possibility of use only inside dry rooms.

Gypsum is known to be a fast-setting and hydrophilic (water-absorbing) compound. The same polymers are introduced into gypsum-based mixtures in order to reduce water absorption and increase adhesion (gluing strength), as well as inhibitors - substances that slow down the gypsum hardening reaction. The simplest example inhibitor - food or technical citric acid. If, when mixed with water for 1 kg of gypsum, you add 10-20 grams citric acid, then the gypsum mass will slow down its hardening to 30-40 minutes.

Gypsum mixtures are divided into:

• Gypsum putties

They consist of a gypsum binder (hereinafter we will call it gypsum, although a mixture of alpha gypsum and anhydride is used in the production), quartz or limestone filler, cellulose thickener and a redispersible polymer. Gypsum putties can be applied in layers from 1 mm to 1 cm.

Attention! Gypsum is calcium sulfate - CaSO4. When painting a surface leveled with such a mixture, it is necessary to use acid-resistant paints. And, accordingly, observe safety precautions: gypsum, even in a small wound, causes very unpleasant sensations.

• Gypsum plasters

Dry mixes that have earned the highest recognition from professional builders. They are light, easy to use, do not shrink (unlike lime-sand-cement putties), quickly harden on the surface and have a fairly high performance - from 30 minutes to 1 hour.

You can make the simplest gypsum plaster in your kitchen: take 10 kg of gypsum, 1 kg of slaked lime, 50 grams of citric acid, mix it all with water and mix until a thick sour cream is obtained.

With the finished mixture, you can close up the strobes, level the wall or ceiling. Although industrially prepared plasters also contain fractionated sand, a cellulose thickener and a redispersible polymer. In some compositions, to give the plaster volume and lightness, expanded perlite or vermiculite is added - light, weightless sands. The average consumption of such a plaster is 7 kg / m2 with an application layer of 1 cm.

• Gypsum-based mounting adhesives

If we want to glue a drywall sheet, mineral insulation, a foam sheet to the wall, it is best for us mounting adhesive based on gypsum. The composition is similar to the composition of tile adhesive, with the exception of the main component: gypsum instead of cement.

• Gypsum floor mixes

Putties based on a polymer binder

They differ from the above types of dry mixes in that they do not contain either cement or gypsum. These are fillers, almost 100% consisting of aggregate - fine limestone or marble flour, cellulose thickener and redispersible polymer.

Putties of this type are very convenient in application and subsequent processing (sanding), suitable for subsequent painting or wallpapering. In diluted form, they have a working capacity of up to 24 hours. But these putties are not intended for leveling surfaces for laying tiles. Putties based on a polymer binder are used only inside dry rooms as a finishing layer for leveling the surface and are not used without further coating.

The main components of gypsum dry mixes are: gypsum binders, fillers, functional additives.

Used as a binder in gypsum mixtures building plaster based on calcium sulfate hemihydrate. Less often they are used in a mixture with anhydrite (especially for plastering works) to ensure the required setting time. High-strength (experts say “high-quality”) gypsum and anhydrite are used in the compositions of self-leveling mixtures. The use of these types of gypsum binders in flooring compositions is explained by the special requirements for the strength of such solutions.

The filler is introduced to reduce the cost of the product, but most importantly - to prevent cracking during operation. In addition, its use improves the manufacturability during application. As aggregates in gypsum mixtures, quartz sand is used, as well as limestone flour, dolomite flour, chalk, ash. Perlite is used in the compositions of light plasters - for example, in mixtures such as HYPER PLAST (the name of this mixture comes from a combination of the words Gypsum and PERLITE). In certain types of putty mixtures, the use of mica is recommended. The dispersion of aggregates is determined by the type of gypsum mixture: quartz sand and limestone sand are used with a dispersion of up to 0.8-1.0 mm. When choosing fillers Special attention given to the granulometric composition: there should be approximately the same ratio of aggregate fractions.

Hydrated lime Ca(OH)2 is added to gypsum mixtures to improve plastic properties, reduce shrinkage and slow setting.

Functional additives slow down the setting speed of the gypsum mixture, increase its water retention, mobility, plasticity, adhesion strength, and reduce the risk of cracking.

Setting retarders are important functional additives that provide an increase in the survivability of the gypsum mortar mixture. It is known that gypsum binders quickly set, and the solution to the problem of increasing survivability is right choice special additives - setting retarders.

Cellulose fibers are introduced into the composition of gypsum mixtures to reduce cracking and shrinkage.

These are the lightest in weight and easy-to-work formulations. Their only drawback is the possibility of use only inside dry rooms.

Gypsum is known to be a fast-setting and hydrophilic (water-absorbing) compound. The same polymers are introduced into the gypsum-based mixture in order to reduce water absorption and increase adhesion (adhesion strength), as well as inhibitors - substances that slow down the gypsum hardening reaction. The simplest example of an inhibitor is food or technical citric acid. If, when mixed with water for 1 kg of gypsum, you add 10-20 grams of citric acid, then the gypsum mass will slow down its hardening to 30-40 minutes.

Gypsum mixtures are divided into:

Gypsum putties

They consist of a gypsum binder (hereinafter we will call it gypsum, although a mixture of alpha gypsum and anhydride is used in the production), quartz or limestone filler, cellulose thickener and a redispersible polymer. Gypsum putties can be applied in layers from 1 mm to 1 cm.

Attention! Gypsum is calcium sulfate - CaSO4. When painting a surface leveled with such a mixture, it is necessary to use acid-resistant paints. And, accordingly, observe safety precautions: gypsum, even in a small wound, causes very unpleasant sensations.

Gypsum plasters

Dry mixes that have earned the highest recognition from professional builders. They are light, easy to use, do not shrink (unlike lime-sand-cement putties), quickly harden on the surface and have a fairly high performance - from 30 minutes to 1 hour.

You can make the simplest gypsum plaster in your kitchen: take 10 kg of gypsum, 1 kg of slaked lime, 50 grams of citric acid, mix it all with water and mix until a thick sour cream is obtained.

With the finished mixture, you can close up the strobes, level the wall or ceiling. Although industrially prepared plasters also contain fractionated sand, a cellulose thickener and a redispersible polymer. In some compositions, to give the plaster volume and lightness, expanded perlite or vermiculite is added - light, weightless sands. The average consumption of such a plaster is 7 kg / m2 with an application layer of 1 cm.

Gypsum-based mounting adhesives

If we want to glue a drywall sheet, mineral insulation, a foam sheet to the wall, gypsum-based mounting adhesive is best for us. The composition is similar to the composition of tile adhesive, with the exception of the main component: instead of cement, gypsum.

Gypsum floor mixes

Self-leveling (self-leveling) compositions for pouring floors in various layers. The composition and principle of action are discussed in the first part of the article (see also the article Leveling the floor).

Putties based on a polymer binder

They differ from the above types of dry mixes in that they do not contain either cement or gypsum. These are fillers, almost 100% consisting of aggregate - fine limestone or marble flour, cellulose thickener and redispersible polymer.

Putties of this type are very convenient in application and subsequent processing (sanding), suitable for subsequent painting or wallpapering. In diluted form, they have a working capacity of up to 24 hours. But these putties are not intended for leveling surfaces for laying tiles. Putties based on a polymer binder are used only inside dry rooms as a finishing layer for leveling the surface and are not used without further coating.

Plaster work is one of the most costly items of repair. As a rule, a large amount of dry mix is ​​used to level walls and ceilings. What types of plasters are there? Which manufacturer to choose? How to save on plaster and is it worth it? How to purchase quality material and distinguish counterfeit products? You will find answers to these difficult questions in our article.

Foundation of the basics. Types of plaster

Almost all dry plaster mixtures are produced according to the same principle. The composition is approximately the same, only the main component, the binder, differs. As a binder, cement, gypsum, limestone, or a combination of two components are used. Plasters on cement base(cement and cement-lime) are used for exterior (finishing the facades of buildings) and interior (unheated rooms and rooms with high humidity). Gypsum mixtures are intended only for interior decoration.

Pros and cons of cement plaster

In addition to the main component - cement various kinds(Portland cement, aluminous, expanding or slag cement) - the composition of the plaster includes a filler (river or quarry sand) and various additives (fillers and plasticizers).

To the virtues cement mortar can be attributed:

Universal purpose (facade and interior works);
long-term viability of the prepared solution (you can knead several bags of plaster in a concrete mixer, using as needed);
high strength of the dried surface;
affordable cost at a relatively low cost.

At the same time, cement plaster has several significant disadvantages:

Low adhesion (adhesion) with concrete surfaces;
long term hardening (about two weeks);
the need for finishing puttying;
high humidity during work (for high-quality crystallization of cement particles, the surface must be sprayed with water);
dust and dirt during work (cement particles are distinguished by a fine fraction, due to which they easily rise into the air and enter the respiratory tract).

The main problem when applying cement plaster can be surface cracking. The drying composition gives significant shrinkage, due to which irregularities can form. For this reason, aids (hair dryers, heat guns, fans), the plaster should cure naturally.

Features of cement-lime plaster

The composition of the factory mixture includes Portland cement, slaked (hydrated) lime, fine quartz sand, fiberglass and various water-retaining additives.

Among the advantages of the solution can be noted:

Good adhesion to most bases (lays on concrete, foam block, wood, brick);
bactericidal properties (lime protects against mold, bacteria and fungus);
good plasticity and long pot life.

The final drying time is about 3 months;
if the technology is violated, cracks may appear on the walls;
lime mortar can cause skin irritation.

Plaster based on lime and cement has an amazing ability - it creates a comfortable microclimate in the room, taking moisture from the air and evaporating it with increased dryness. After hardening, the surface is resistant to mechanical damage and temperature changes.

Advantages and disadvantages of gypsum plaster

Standard gypsum plaster is based on gray, cream or white gypsum, light fillers (reduce consumption) and modifying additives.

Thanks to a large number pluses gypsum mixture is great for interior decoration:

Dries quickly;
does not require additional puttying;
plastic, does not slip from the walls during work;
applied in one or two layers;
does not shrink and does not crack;
generates little dust (compared to other types of plaster).

Among the disadvantages of the gypsum mixture can be noted:

Low viability of the solution (about 40 minutes);
low resistance to mechanical damage;
moisture instability.

Gypsum plaster has good thermal insulation properties, which allows not only to align the walls, but also save on heating. In addition, gypsum absorbs excess moisture well - even if neighbors flood you, the walls will dry out within a few days.

Plasters with additives

Modifying additives included in plaster mixes improve the physico-chemical characteristics of mortars in several ways:

Increase the service life and durability of the coating;
simplify finishing work;
prevent evaporation of moisture from ready solution;
protect against mold and mildew.

Depending on the modifiers and plasticizers used and their specific volume, there are several types of specialized plasters:

"Warm". The composition includes foam glass, perlite, polystyrene foam chips and others thermal insulation materials. Due to its low weight, it does not weigh down the structure.
Soundproof. Absorbs extraneous noise due to expanded clay, slag, perlite or pumice included in the solution.
Waterproofing. The composition is used in bathrooms and toilets.
Fire resistant. Resists the action of an open flame, suitable for working areas in the kitchen and finishing boiler rooms and furnace rooms.

It is worth noting separately decorative plasters. Typically, these mixtures are used as finish coat. Leveling walls with texture mortar is not a cheap pleasure. Therefore, I use a gypsum mixture as a base, and decorative plaster acts as a putty.

"Plaster" brands

All major manufacturers of dry building mixes have in their assortment a line of plasters for interior and exterior use.

The German company Knauf with gypsum plasters "Rotband", "Goldband", "HP-Start" and cement plasters"Grunband" (universal), "Unterputz" (facade), "Zokelputz" (for the base). "Rotband" is considered universal option It can be used for both walls and ceilings. Finishing teams love Knauf products for their ease of use and excellent quality. There are also disadvantages: it is this brand that is most often faked, and the cost of eminent plaster is quite high.

The honorable second place is shared by Volma, Prospectors and Eunice. The products of the concerns are presented in almost every hardware store. Volma offers gypsum plasters "Volma-layer" (does not require additional puttying, glossy to a shine), "Volma-canvas" (lightened by the addition of fillers), "Volma-layer" (with increased plasticity). The names of cement mixtures speak for themselves: Volma-socle, Volma-akvaplast and Volma-aquasloy.

The company "Yunis" presents the plaster "Teplon" for interior work (Teplon white, Teplon gray, Teplon moisture resistant), economical option"Standard" gray and white color, universal plaster "Silin" (Silin facade, Silin basement, Silin for interior work) and decorative mixtures "Fur coat-decor" and "Bark beetle-decor".

The "Prospectors" most in demand are gray and white gypsum-based plaster mixtures.

Among dry mixes of medium price category plasters "Rotgyps" (Perm), "Osnovit" and "Ceresit" have proven themselves well.

Budget options do not always justify their cost. As a rule, the lion's share of the price falls on plasticizers and modifying additives. With a decrease in cost, manufacturers will be forced to save on quality by using an insufficient amount of additives or completely abandoning them.

Alas, almost everything on our market is faked, but counterfeit manufacturers are especially fond of dry building mixtures. Exact percentage It is very difficult to name high-quality and fake products, according to some reports, counterfeit products can reach 15-20 percent of the total.

Most often, "copying" is subjected to famous brands, while the shopkeepers use three main methods:

Packing cement-sand mixture in branded bags (packaging is ordered at the printing house).
Packing branded dry mixes in a less bulky package (a thirty-kilogram bag is scattered into bags of 1-2 kg).
Sticking the top layer on kraft bags (in this case, inexpensive packaged products are taken, upper layer carefully removed from the bag, a copy of the packaging of a reputable brand is glued on top of it).

Distinguishing a fake is quite difficult, but not impossible. The so-called manufacturers cannot afford high-quality equipment that is installed in large factories, so no one has yet been able to produce the perfect counterfeit.

To avoid unpleasant surprises when buying, pay attention to the following points:

Purchase plaster from official dealers (a list of representatives in your city can be found on the website of dry mix manufacturers) or in large chain stores.
Carefully examine the quality of the packaging: the bag should be three-layer, with a clear logo. Blurry pictures and letters clear sign fakes.
Many brands supply bags with holographic stickers, which are extremely difficult to fake.
On the bag in without fail the manufacturer, production date and expiration date of the product must be indicated. Do not buy formulas that are expiring or expired - their properties can be very different from those declared.
Major manufacturers put the release time on each bag. The time on the die should differ on different bags by at least a second. If the numbers are the same everywhere, then you have a 100% counterfeit.
Ask the seller for certificates and quality certificates for the presented goods. Documents must be original. If you are offered a photocopy, then it must bear the blue seal of the seller.
Do not buy a large batch of plaster at once. If possible, it is worth buying one or two bags and trying them out.

Fake is not the only trouble that can occur when buying plaster. Pay special attention to where the mixtures are stored and what condition the bags are in. Perfect option- a dry closed room in which products are placed on racks (on pallets and in their original packaging). If the storage conditions are violated, the gypsum mixture quickly picks up moisture, and the cement seizes in lumps. It is impossible to prepare a high-quality solution from such plaster.

When choosing plaster, do not focus on the cost of the bag. Find the consumption of the mixture (it is indicated on the label) and translate the cost into square meters(the surface that you can plaster with a mixture from one bag). It may happen that the “expensive” composition will turn out to be much more profitable than a cheap bag.

When purchasing a plastering solution, take care of the putty in advance. It should be on the same basis as the plaster, ideally from the same manufacturer.