The use of putty for wet rooms. Waterproof putty: properties of mixtures based on cement and gypsum, working with the composition What kind of putty to use in a wet room

Putties are mainly used for finishing surfaces in order to close up obvious defects.

Their scope is quite wide.

There are compositions for dry rooms, and for outdoor decoration or places with a high level of humidity, there is putty for wet rooms.

When preparing the surfaces of the floors for direct finishing, it is necessary to level out all the irregularities and putty them, applying compositions of the appropriate type and purpose.

As a result, it is obvious that not every material will work correctly under certain conditions, especially in wet conditions.

As a conclusion, moisture-resistant putty is necessary for the final preparation of floors that are constantly exposed to moisture in its various states - such as condensate, steam, fog or rain.

They include special water-repellent components that prevent water from penetrating into the coating.

Moisture-resistant putty mixture is designed for high-quality repair work in the kitchen, bathroom rooms, basement, where conventional compounds lose their properties and qualities.

When solidified, waterproofing compounds made on the basis of Portland cement turn into a solid monolith that does not get wet, acquiring greater strength at a higher level of humidity.

Putty is purchased for wet rooms with surfaces from:

• wood;
• Concrete;
• gypsum board;
• cement plaster;
• Brick.

Characteristics

The water resistance of this solution contributes to the preservation of operational qualities with constant exposure to water.

This property is also preserved for putty compositions that are hidden under the facade finishing material.

This putty has heat resistance. Their coefficient of thermal expansion is minimal, which does not deform the cladding and its peeling.

The period of the next repair depends on the durability index. The term of use of high-quality compositions is from 20 years.

Cement waterproof mixtures

The main component that is part of such solutions is Portland cement, obtained in the form of a powdered substance during the grinding of gypsum and clinkers.

To turn this main component into a solid substance, water is added in a fractional ratio.

The mixture is prepared at a positive temperature, thus preventing the water from freezing.

After mixing, the solution gradually hardens and gains even greater hardness when moisture enters the puttied floor.

When hardening, the color change of the solution occurs. After its application and curing, it acquires a light gray color, and with further use, the color acquires a more gray tint.

At the same time, lighter ones are considered to be of better quality than gray ones.

Only solutions based on Portland cement have excellent water resistance. Often such mixtures are given the name facade, thus reflecting the essence of the use of putty.

Therefore, rooms with a high level of humidity can not do without it.

Master class on the topic of the article:

Each putty for wet rooms has its own instructions, which must be followed in full.

Gypsum moisture resistant putties

In a non-moisture-saturated room, curing with gypsum can be done in 1.5-2 hours. Putty is applied in thick layers to maintain the climate.

This material is consumed much less than cement compositions, and after it dries, small cracks will not be present.

The basis of the mixture may include a gypsum-cement-purcalan component, which is not very susceptible to moisture. When treating rooms with this composition, their complete drying is required.

Otherwise, facing materials attached to the gypsum surface will not last long.

Principle of operation

The set of hardness of any traditional putty for finishing work on the facade or in rooms with a high level of humidity is carried out in a day.

Their difference is in high elasticity, evenness of the coating and excellent adhesion to the base to be coated.

In addition to plasticizers, the essential components of the putty mixture, there are pigment dyes that make it possible to obtain a high-quality painted layer throughout its entire thickness.

A feature of most moisture-resistant material is the absence of the need for a special tool for applying the composition to the walls.

Their application is carried out on the primer layer in the usual way. This is followed by a leveling stage, at which defects and irregularities are repaired.

In the presence of serious defects, another primer layer is applied with the necessary moisture-resistant composition.

Puttying is the next step, which is carried out after the primer has completely dried. The application of the solution is carried out with spatulas of different sizes, which depends on the preferences of the masters.

All puttying work must be carried out in dry rooms, as this process does not tolerate moisture.

In order for the cement-based putty to gain maximum strength, when it hardens, it is moistened - spraying the walls with water.

Summarizing

The main function of moisture-resistant putties is to level the surfaces of wall ceilings, and prepare them for further finishing work in wet places inside or outside a residential building.

Their use is similar to the use of conventional ones, therefore, for application, you will need 2 spatulas - narrower and wider, and a container for the direct preparation of a moisture-resistant composition.

Watch the video

Starting a bathroom renovation with your own hands, carefully choose all the finishing materials

Despite the modest dimensions of the bathroom, its quality repair sometimes requires much more investment than the repair of residential premises, since here it is necessary to ensure the durability of the finish in conditions of high humidity and variable temperature conditions. And durability largely depends on which putty to choose for the bathroom and how well the surface is prepared for its application.

We will talk about this in this article.

To determine the type of putty, we need to find out the requirements for its properties and characteristics, and then choose from those materials that meet these requirements.

What properties should putty have

No matter what kind of decorative finish is provided in the bathroom - tiles (see Bathtub tiling: how to do it right), paint, plastic panels (see Bathroom plastic paneling: how to do it yourself) or something else - leveling the walls the composition must have the following properties:

• moisture resistance. During the entire period of operation, the coating should not collapse or peel off from the base under the influence of moisture.
• Durability. The service life of the finished coating without loss of quality must be large and be at least twenty years.
• Resistant to temperature changes. Since not only the humidity of the air, but also its temperature is constantly changing in the bathroom, these changes should not lead to deformation of the putty layer, its expansion and contraction. Otherwise, the lining on it will not hold.

On a base made of high-quality putty that meets all of the above requirements, the tile is glued “tightly”, and it will not be easy to remove it during the next repair

Note. These are the main criteria by which the composition should be selected. There may be others related to your individual requirements. For example, if the walls are planned to be painted, then the surface should be crack-free and perfectly smooth, which means that the mixture should not shrink and consist only of components of a very fine fraction.

What mixtures can be used in the bathroom

The above requirements are fully met by putties based on cement and polymer binders:

• Cement waterproof putty for the bathroom It is made from high-grade Portland cement, which only becomes stronger when exposed to moisture. A freshly applied coating is even recommended to periodically moisten or spray with water. As a filler, in addition to fine sand, crushed marble or clinker chips are added to the putty, and for ease of application and improved performance, various plasticizers, modulators, and hardeners are added.

Advice. If you're going to be painting or embossing your walls with a paint roller or similar, look for a pigmented putty in the color you want to cut down on paint wastage.

• Polymer moisture-resistant putties are made on the basis of acrylic or latex. and also contain various mineral and synthetic additives. They are more plastic and easy to use, do not shrink, and remain viable longer after preparing the mixture or opening the package with the finished composition. And if it were not for the high price compared to cement counterparts, then polymer putty would confidently lead the list of materials for finishing rooms with high humidity.

Advice. You will not be mistaken if you take any facade putty to level the walls in the bathroom. A priori, it must be resistant to any climatic influences, including temperature changes and direct exposure to moisture, but it may cost more.

But gypsum mixtures are absolutely not suitable here, even those that are marked as moisture resistant. They are not able to resist the concentration of wet and hot steam that is often present in the bathroom, not to mention the possible leaks from above.

How to putty the walls in the bathroom

Even if you are confident in the quality of the chosen putty and know how to work with it, you can’t just level the walls with it and tile it on top. The surface must be carefully prepared.

Training

Instructions for preparing the surface for puttying include its cleaning, disinfection and priming (see Primer before puttying the walls - is it needed). All this is done to ensure that the coating stays firmly on it and resists the appearance and growth of mold.

So:

• Cleaning consists in removing the old, poorly adhering coating from the walls, jointing cracks. If there are protruding irregularities in the form of pebbles, influxes of plaster, metal fittings or wooden mortgages, they are knocked down with an ax or cut off with a grinder. After all these actions, the walls are cleaned with gasoline or solvent from greasy stains and freed from dust.
• Further, their condition is assessed, and if the surface is seriously damaged, has large potholes and cracks, then they are filled with cement plaster. And if necessary, it aligns the entire plane.

The joints between the plates are filled with mounting foam, the excess of which is cut off after drying.

• Since a humid environment and warm air are ideal conditions for the development of fungal mold, the next mandatory step is to treat the walls with an antiseptic.

It is important! If the surface is wet, it is pre-dried, and if there are existing traces of mold, it is cleaned with a metal brush and burned with a blowtorch. Of course, first of all, it is necessary to find and eliminate the source of its occurrence.

• Finally, the walls are treated with a deep penetration primer, which will fill all the pores and microcracks, strengthen the surface and make it more receptive to subsequent puttying.

At this preparatory stage is completed, it remains only to wait for the primer to dry.

alignment

The purpose of putty is to increase the moisture resistance and strength of surfaces and create a flat plane for subsequent decorative finishing. Since we use moisture-resistant putty for the bathroom, the first task, subject to high-quality preparation, is solved by itself. But to align the walls will have to try.

Depending on their initial state, several layers of putty may be required, since it cannot be applied in a thick layer - it will not adhere well and crack.

Therefore, first we fill with a solution all the recesses and cracks or joints and attachment points, if we are talking about plasterboard puttying (read how to do it correctly in the corresponding article). We wait for drying, we skin the “patches” and treat them with a primer, after which you can apply a continuous leveling layer or several layers.

In the process of this work, we constantly control the evenness of the surface and its position in the vertical plane using a long building level. Ideally, each applied layer after drying should be treated with a primer.

But in practice, it is often used only before the last finishing layer, which is usually done with a different putty - less granular and more plastic. It's called the finish line.

Before applying it, the walls must be carefully sanded, removing all splashes, sagging and traces of the spatula, since the thickness of the finishing layer should not exceed 1 mm. However, all this makes sense only if painting is provided.

The surface prepared for tiles may not be perfectly flat, and the roughness will only benefit adhesion to the tile adhesive.

Pay attention to the picture: the bottom layer can be considered satisfactory for tiling or paneling. Finishing is applied only for painting

Conclusion

There are no significant differences in leveling surfaces with ordinary or moisture-resistant putty. In both cases, the work is carried out according to the same technology; only antibacterial impregnation, which is usually not required in dry rooms, can be attributed to the nuances.

If this is the first time you are faced with the need for self-renovation in the bathroom, the video in this article will help you get more information on this topic.

Before starting any repair, you need to correctly select all the necessary finishing materials. For each type of surface, rooms, there are types that affect the final quality. So, moisture-resistant putty is suitable for baths, as well as for work in other damp areas. Its use makes it possible to obtain a truly resistant coating that will not be subject to destruction and the appearance of various fungi and mold.

It does not matter what the surface is prepared for in the bathroom, for painting or tile. In any case, the putty must have the following properties:

1. Possess increased resistance to moisture, be water resistant. That is, even after the advent of many years, the applied layer should not be destroyed.
2. The second property follows from the first one. Namely, durability. So, the service life should be equal to several tens of years.
3. There is another negative factor that constantly affects coatings - temperature changes. Therefore, it is necessary that the putty calmly withstand them.

What should be the result when the moisture-resistant mixture takes its place? It should be a very strong and durable layer. And if you use a tile as a protective and decorative coating, then it should hold like a glove.

On a note! The above properties are basic, but one must always proceed from real conditions, which require additional criteria. So, if it is supposed to carry out painting, then you need to carefully approach the choice of fine mixtures.

What are the bathroom mixes

Now there are many different putties on the market, which differ in their composition and are suitable for wet rooms. It is the presence of different components that determines what qualities the mixture will have.

Based on the required properties, two types of materials can be distinguished:

Attention! Gypsum putties should not be used for work in wet areas. Many manufacturers mislead the consumer by indicating the word waterproof (moisture resistant) on the packaging. You need to understand that this is a simple deception. Even if many synthetic additives are added to gypsum, it will not be able to acquire the necessary qualities.

Rules for puttying surfaces in the bathroom

You can’t just apply the mixture to the walls and smooth it out. There is a whole range of activities that precede such work. Any surface, even if it seems that it is ideal, needs preliminary preparation.

Advice! It happens that large cracks or holes between the seams are found on the walls or ceiling. They are sealed with cement plaster. Although you can simplify this work a little, for this they take mounting foam. It closes up large damage well and does not require much effort to apply.

Puttying

Putty for the bathroom must necessarily contain an inscription on the package - suitable for wet rooms, and also belong to one of the types that were given above. Thus, we can say that the main condition will be achieved a priori. Namely, the mixture will have the necessary qualities. But now another problem arises, it needs to be applied correctly.

It is especially difficult when painting surfaces is supposed to be. The fact is that the paint immediately detects and highlights all existing defects.

Stage one

Determine the required number of layers. If the work is carried out on already applied plaster, then it can be limited to the finishing mixture. When there are significant irregularities that require the application of a solution with a thickness of one centimeter, then they resort to starting putties.

Stage two

Often use dry cement putty, it needs to be prepared:

• The required amount of the composition is poured into the container, water is added little by little, constantly stirring with a drill with a mixer attachment.
• It is required to obtain a pasty consistency, which is left for 10 minutes. This is done to ensure that all additives are completely dissolved. After that, stirring is repeated.

Stage three

The most difficult part begins - applying the mixture to the surface. Although if you practice a little, it turns out that everything is not as scary as it might seem at first glance.

Two main tools are used for work: a medium and a large spatula, they keep a small one in reserve, it will be required for puttying in hard-to-reach places.

• In large areas, the following technique is used: the solution is thrown from below, and then smoothed out with a rule.
• When this is not possible, then they do this: with a medium spatula, apply the mixture to a large one, which they work on the surface.
• Corners are formed with a special corner tool.

With the help of such simple rules, it is possible to apply starting and finishing compositions in any wet areas.

After complete drying, the surface is sanded. If you want to get a perfectly smooth, almost mirror-like layer, then use the glossing method.

Conclusion

Wet rooms require the most careful treatment. If you approach their finishing superficially, it turns out that very soon fungi and mold will begin to appear, the layer will simply collapse. It is better to devote a little more time to this, but then forget about the problems for many decades.

Finishing putty is used at the final stage of finishing work and is intended for perfect leveling of plastered surfaces for further application of paint, wallpaper, etc. on them. However, not all rooms are of the same type and require operation in the same conditions, some of them have high humidity and require additional measures and the use of other finishing materials.

Special finishing mixtures used for wet rooms allow not only to protect the surface from dampness and premature destruction, but also provide resistance to mold and fungus.

Finishing moisture-resistant putty for wet rooms occupies a special place among dry bulk building mixtures and is in high demand among specialists.

Finishing putty can be used in wet rooms to level the following types of surfaces:

• concrete
• cement plaster
• gypsum bases
• brick
• wood and wood products

Reliable protection

Dry mixes from various manufacturers used for the manufacture of moisture-resistant putty and the preparation of a room for painting or applying another type of finishing materials contain special additives and synthetic-based components.

Thanks to such additives, the composition receives improved technical indicators, namely:

• protection against condensation on the surface
• resistance to possible leaks
• resistance to moisture
• protection against ingress of drops into the structure of the material
• immunity to various bacteria and deposits

Right choice

The use of moisture-resistant compositions for wet rooms in the process of finishing them ensures the strengthening of the structure and the preservation of high performance properties throughout the operation. That is why more and more construction firms, companies involved in interior finishing work, as well as individuals decide to buy moisture-resistant putty for wet rooms. Moreover, the price of the material is quite acceptable.

The best manufacturing companies for their products, such as Knauf, for example, or VETONIT, guarantee the safety of the coating for wet rooms for at least 20 years.

In general, finishing putty for wet rooms provides resistance to changes in air temperature, constant high humidity and does not react to external negative environmental influences. As a result, the surface securely holds the material used as a finishing coating - tiles, mosaics, paintable, etc.

Varieties of materials

Cement finishing putty. The main component is high-quality Portland cement, which, after mixing with water, acquires increased strength and reliability. Specially crushed marble chips or river sand, artificial hardeners and plasticizers are added to the composition. When preparing the surface for painting, it should be borne in mind that the color of the surface after drying will be light gray.

Gypsum putty Knauf, which includes special polymers, has an excellent level of water resistance. The material is ideal for wet rooms and other types of premises, where it is necessary to seal seams, joints and technological holes, especially in places of high humidity, possible water leaks, etc. The price of the material purchased from the official representatives of the company, as a rule, is lower than that of competitors.

Acrylic putty waterproof VETONIT (as well as other manufacturers), a mixture consisting entirely of synthetic materials. Ideal for bathrooms, bathrooms, kitchens, shower rooms and in general for damp rooms in the home. The material is durable, reliable, resistant to cracking and is able to successfully withstand high humidity, including at varying temperatures.

Finishing putty on an oil-adhesive basis is sold ready-made, does not require mixing with water and adding any other components.

Our company offers to buy high-quality finishing putty from reliable, proven manufacturers, ideal for wet rooms. All the necessary information is indicated in the catalog, and our managers are always ready to provide assistance with choosing the appropriate option.

Finishing waterproof putties are used most often when finishing wet rooms. Such as:

• bathrooms
• sanitary facilities
• swimming pools
• bunkers
• hallways

The properties of the material from which waterproof putties are made helps to maintain the original appearance for quite a long time. When working with finishing putty, it is necessary to follow all the rules and instructions, otherwise an incorrectly executed application technology can put all repair work down the drain. Also, do not forget about the precautions and keeping the tool you work with clean.

You can buy a finishing waterproof putty by calling the phone on the website or by leaving a request in the basket. Our managers are ready at any time to suggest and select the material that you need. Buying waterproof putty from us, you get a quality guarantee. The Virashop store only works with certified products directly from the manufacturer. Fast delivery of putty in Moscow and the region. You can get acquainted with the terms of delivery

If you want to buy finishing putty in bulk, then we provide a discount system.

The bathroom is constantly experiencing excess moisture, so ordinary putty is not for it, especially gypsum solutions that absorb moisture well and allow fungus to multiply. It is better to choose what the facade of the house is finished with or putty for wet rooms, the basis of which is cement. Here it does not absorb moisture, so it keeps perfectly on the walls, without falling off even at 100% vapor.

Repair in the bathroom begins with an inspection of all walls and ceilings. If the mold has eaten through the corners, then it is worth walking in these places with a special tool. You can not use expensive drugs: the fungus is afraid of the ordinary liquid that you clean the toilet. Then pay attention to cracks and chips, places where the paint has broken off. Previously applied plaster is knocked down or cleaned of plaque with a specially selected brush of increased rigidity, and only after that the puttying of the walls begins.

Putty for wet rooms: preparatory work

If you are not satisfied with the old coating, then solvents (if paint is available) or products that soften the surface will help to completely get rid of it. Enamel paints stick to the walls quite firmly: you should not remove them with chemical compounds: go over the surface with grinding tools, make notches - and do not forget to remove dust from the walls. Now you can do puttying work, having previously bought a primer.

Putty for wet rooms: priming stage of work

The primer for the bathroom is selected moisture resistant. A latex-based solution is best suited for these purposes. Not only specially purchased putty, which is not afraid of water, will perfectly fall on it, but also the paint that you apply on top of the putty material.

Ceilings are prepared for paint in the same way as walls: an acrylic primer is passed over the surface several times: each layer must not only dry, but also wiped with a soft cloth. Then the finishing putty is applied, it is given to dry for at least a day. The ceiling is polished, gets rid of dust, primed again, polished - and only then covered with a dye of the required brand and color. A vapor-tight product is sold in any building materials market. The painted ceiling can be cleaned at any time with a window cleaner.

To prevent your surfaces from cracking, use reinforced putty materials, for example, mineral, with special fibers, moisture resistant. They will strengthen the walls with a polymer mesh, and the room will be made quite attractive. In order to avoid cracking of painted surfaces, reinforced putty is used. Manufacturers of building mixtures produce mineral putties with reinforcing fibers, moisture resistant, designed to strengthen walls with or without a reinforcing polymer mesh.

If possible, rent a pneumatic fishing rod. It applies a putty solution in a matter of minutes. The device itself resembles a hose attached to a tank on wheels. One person works with such a device, managing to putty large enough rooms in 8 working hours.