Plaster adhesive mixture Knauf Sevener consumption. Plaster-adhesive mixture "Knauf-Sevener": technical characteristics, reviews. Types of adhesive mixtures

Knauf Sevener is a special dry lime-cement mixture consisting of fractionated sand, special fibers and polymer additives. Knauf Sevener is used as an adhesive when attaching thermal insulation, mineral wool, reinforced glass wool mesh to the surface of walls. The water-repellent properties of the mixture protect the insulation and masonry from getting wet. Plaster is also used to treat cracks on old plaster surfaces. Knauf Sevener is applied either manually using a spatula or with a high-performance mortar mixing pump.

Advantages of extruded polystyrene foam

Expanded polystyrene (PPS) - heat insulating material, 98% consisting of air. Outwardly, it resembles polystyrene foam, but other characteristics of these insulation materials differ. Expanded polystyrene boards are used for insulation and partial sound insulation of walls.

Advantages of expanded polystyrene:

• high degree of thermal insulation;
• vapor permeability;
• moisture resistance;
• strength;
• does not react with cement, which makes it possible to plaster PPS boards;
• does not support the development of mold and fungi;
• If the installation technology and operating rules are followed, the service life of the material is up to 30 years.

Why plaster polystyrene foam insulation?

In the process of insulating facades, polystyrene foam is mounted with outside building. Insulation boards are glued to the walls using adhesive solution for PPS, and then secured with disc-shaped (mushroom-shaped) dowels. To protect and preserve its properties, the surface of the heat-insulating layer must be protected from ultraviolet radiation, temperature changes and other atmospheric influences(wind, precipitation, etc.). One of the best ways The protective finish of expanded polystyrene is plastering . This type of coating is stronger and more durable than others, and also has big choice execution options. Plaster is perfect for both protecting and decorating the facade.

How to plaster: choosing a mixture

For plastering PPS, you cannot immediately use ordinary cement-sand mortars. They will quickly peel off from the surface of the slabs. Therefore, the first layer is applied special plasters on polystyrene foam. In addition to cement and fine sand, they contain glue and other additives that ensure strong adhesion of the mixture to the walls. After applying the foam glue, you can already create the base plaster layer using a cement-sand mixture.

Adhesive plaster is intended for attaching PPS and some other types of insulation to various mineral substrates.

Several popular brands of adhesive plasters for polystyrene foam:

1. Ceresite ST 85. Compressive strength (a parameter indicating the ability of the material to withstand destruction and mechanical loads) - 8 MPa. Frost resistance 100 freeze-thaw cycles.
2. Knauf Sevener. Plaster of this brand has all the characteristics of Ceresit ST 85, differing only in slightly lower compressive strength (7.5 MPa) and frost resistance (75 cycles).
3. Founds Coverplix C117. Plaster-adhesive mixtures of this series have high compressive strength - 10 MPa, frost resistance of 75 cycles. There are several in the series special types plasters: winter, high-strength, reinforced, etc.
4. UNIS Thermal adhesive for insulation materials. Its main characteristics: frost resistance of 100 cycles, high vapor permeability, suitable for machine application.
5. Adhesive plaster for polystyrene foam Dali. It is based on cement. The mixture is elastic and has increased compressive strength.

The presence of reinforcing microfibers in the plaster mixture does not eliminate the need to use reinforcing mesh. Therefore, a fiberglass construction mesh must be attached to the polystyrene foam underneath the plaster.

To create a base (not decorative) layer can be used ready cement-sand mixtures . They are available in almost every hardware store.

For self-cooking C-P solution take cement grade M400 or M500. Its ratio with sand will be from 1:4 to 1:5. River sand is cleaner and contains no clay impurities. But quarry sand has better grip because its edges are sharper.

The proportion Water/CPS = 0.8-1.2, depends on the moisture content of the sand.

For finishing external walls buildings use special decorative plasters, for example:

1. Ceresit ST 60, 63, 64. These are decorative pebbles acrylic plasters, are recommended by the manufacturer, including for coating polystyrene boards. Apply over base coat. Ceresit ST series 60 is the basis for tinting. Color at customer's choice.
   
2. Ceresit ST 35, ST 137. This mineral mixtures. ST35 gives the surface a “bark beetle” texture, ST 137 pebble. There are three versions in stock: white, painted and “Winter”. Winter version suitable for work at temperatures from 0 C.
   
3. Ceresit ST 174, 175. Plasters in this series are made on a silicate-silicone base. ST 174 pebble and ST 175 “bark beetle” are the base for tinting.
   
4. Knauf Diamond. This is a mineral structure decorative plaster. Suitable for painting. Compressive strength 3.5 MPa, frost resistance 50 cycles. Best used in combination with a base coat of Knauf Sevener.
   
5. Stolit AF. The plaster mixture of this brand is classified as structural acrylic and gives the surface a “lamb” relief.
   

When choosing a finishing decorative coating for polystyrene foam, you need to take into account that acrylic plasters are more resistant to atmospheric influences.

Plastering technology

Materials and tools that will be needed for plastering polystyrene foam boards:

• primer for PPS;
• brush or roller;
• adhesive plaster mixture for PPS;
• cement-sand mortar;
• decorative plaster for PPS or paint;
• fiberglass reinforcing mesh with a density of 145-160 g/m2;
• plaster perforated corner;
• spatulas large and small (width 10 mm and 450 mm);
• construction float or sandpaper;
• hacksaw or needle roller;
• solution container;
• mixer.

Work order:

1. Clean polystyrene foam boards from dust and dirt
2. Apply the PPS primer with a roller or brush.
3. Using a hacksaw or a needle roller, make diagonal notches on the slabs - “comb out” the insulation. This is necessary for better adhesion of materials.
4. Cut the reinforcing mesh into strips the length of the entire height of the wall (for one-story houses). If plastered multi-story building, then the length of the grid is chosen based on the ease of working with it.
5. Prepare the adhesive mixture in a volume of no more than one bucket. The solution should always be fresh.
6. Glue the plaster perforated corner to the corner. Instead, you can use a piece of mesh, bent in half.
7. Apply a layer of mortar 2 - 3 mm thick to the wall to secure the mesh. Its strips are glued overlapping. Therefore, the width of the adhesive mixture should be 10 cm less than the width of the mesh section.
8. Press the mesh into the solution with a spatula. Move from top to bottom and to the side. The mesh must be completely covered with the plaster mixture.
9. Apply a strip of adhesive solution under the next piece of mesh.
10. Glue a piece of mesh in the same way as the previous one. Thus, cover the entire surface of the walls with reinforcing mesh.
    

    Make sure that the joints of the mesh do not touch the joints of the polystyrene foam boards.

11. After the first adhesive layer applied to the mesh has dried, you need to rub it in using a damp construction float in a circular motion. It is not necessary to strive for perfect smoothness. This will impair grip next layer plaster mixture.
12. The walls are primed again deep penetration. Ceresit CT 17 or KNAUF Izogrund will do.
13. After the soil has dried, begin plastering. cement-sand mortar. I use the same tools - a large and a small spatula. The thickness of the second layer is 3-5 mm.
14. After the base layer has dried, rub the surface of the walls again with a moistened trowel or sandpaper. If traces remain from circular movements, you can rub it a second time with straight ones. When performing the final grouting, it is necessary to achieve perfect result. This will simplify the application of decorative finishes.
15. Under finishing layer When finishing polystyrene foam boards, apply another layer of primer.
16. Paint the dried plaster or cover it with a decorative plaster mixture.

Plastering polystyrene foam boards is the best way to protect them from adverse weather conditions and create an attractive appearance walls of the building. The technology for applying plaster to polystyrene foam is quite simple, you just have to remember the main rule: you need to use a reinforcing mesh and attach it to the EPS using special adhesive mixtures. This will ensure the strength of the entire facade finishing and will create a base for a decorative coating.

We hope you found this article useful and interesting. You can read about working with other types of plaster on the pages of our website. Leave your questions and comments below. We will definitely answer them.

Facade Technology of facade plaster using foam plastic: choosing what and how to plaster the insulation

Knauf is rightfully considered the most renowned manufacturer plaster mixtures on our market. Numerous types of products from this company provide solutions to almost any internal and external plaster. And today we want to talk about one of these products - Knauf-Sevener, a plaster-adhesive mixture that is becoming increasingly in demand in domestic market. At the same time, we will analyze the advantages and disadvantages of the material, list the areas of its use, consumption per 1 m2, as well as application technique.

Products from Knauf under the Sevener brand belong to the category of cement plaster mixtures. This means that it is ideal for external works, since the stability of the composition is much higher than that of gypsum options. It is sold in dry form, which must be diluted with water before use according to the manufacturer's instructions. The most popular packaging form factor is 25 kg.

In addition to cement, the plaster contains sand, special fibrous components and additives that improve performance characteristics material, such as moisture resistance.

For what purposes is this finishing material used?

• Finishing of facades and plinths of buildings, as well as repair of previously plastered surfaces as part of external work. The composition fits perfectly on concrete and brick surfaces;
• Bridge plaster, which improves the adhesion of smooth and porous concrete layers;
• Plaster over insulation. To do this, the first layer is applied directly to the material, in which the reinforcing mesh is embedded, after which everything is covered with a second layer, resulting in a durable coating;
• As an adhesive mixture for insulating buildings with polystyrene boards or mineral wool.

Important! The composition is equally suitable for application manually, and for machine work.

Specifications

• Density after drying - 1600 kilograms per cubic meter;
• The maximum size of sand fractions is 1.5 millimeters;
• Compressive strength – 7.5 MPa;
• Frost resistance – 75 cycles of freezing and thawing;
• Vapor permeability coefficient – ​​0.1 mg/(m h Pa).

Benefits of plaster

• Even after prolonged use, with proper initial preparation of the composition, cracks do not appear on the surface of the plaster;
• The plaster tolerates moisture well. For this, as in the case of cracks, the fibers that make up the material are responsible, making it not only plastic, but also moisture resistant;
• The strength of cement plaster is much higher than that of gypsum analogues;
• Cost of plaster cement based also lower than that of gypsum. That is why the latter is mainly used for interior work, and the first one is for external facade finishing;
• The material has full vapor permeability, which allows it to maintain optimal microclimate in room;
• Good resistance to temperature changes. Plaster can withstand a large number of freezing and thawing cycles.

Flaws

As for the disadvantages, this plaster simply does not have any within the scope of its work. Moreover, we are talking about manufacturer Knauf, the quality of the mixtures is at the highest high level. The only disadvantages that can be cited are that such “wet” facade works more labor-intensive than cladding a building, and, moreover, can not be carried out on all types of walls. But this applies to general shortcomings, and not specifically to this product.

Material consumption

The key to the efficiency of Sevener plaster lies in its low consumption. For 1 m2 of wall surface, depending on the type of wall surface and the form of finishing, it takes about 3.5-7 kilograms. Thus, a maximum bag of 25 kg is enough for finishing 7 square meters wall surface. And since a bag costs only 465 rubles, even large-scale facade work will be affordable for most. In general, the material consumption depending on the work is as follows:

• The adhesive composition when cladding the facade with insulation slabs on a flat wall surface is 3.5 kilograms per square meter;
• Similar work, but in the case of masonry - 6 kilograms per square meter;
• Work on top insulating material– up to 7 kilograms per square meter;
• When working on top of old structural plaster - 5-10 kilograms;
• Similar to the top one, but using alkali-resistant facade fiberglass mesh - 5 kilograms.

Features of work

In general, all the requirements for applying such plaster are similar to those that apply to other similar cement-based mixtures. Therefore, you need to start with careful preparation. work surface. The wall must be thoroughly cleaned of unstable fragments, dirt and anything that can reduce adhesion. In this case, it is best to remove the old finishing coating, if we are not talking about work during the construction of a building.

Important! Work on applying the mixture must be carried out at temperatures from +5 to +30 degrees Celsius in dry weather. In extreme heat, the material already applied to the walls begins to dry unevenly, but when low temperatures the composition does not gain its properties.

At the next stage, the solution is mixed, for which water is gradually added to the powder mixture. A 25 kilogram bag uses approximately 5 liters of water. It should be noted here that the viability of the ready-to-use solution is 2 hours. After this, the composition hardens and begins to lose its performance qualities. So knead only as much as you can use during this period. At the same time, it is much more effective to mix the solution during dilution not by hand, but by using a drill with a special attachment.

The mixture is applied both manually and using automatic means– high-performance mortar mixing pumps. In the case of too smooth walls The adhesion of the compound may not be sufficient and it will not bond to the surface properly. In this regard, you can apply notches to the wall, thus increasing the roughness, or proceed as follows:

• Treat the surface hydrochloric acid, which is mixed with water in proportions of 1 to 6. In this case, the wall is covered with the solution and left for some time until the surface is corroded and becomes rougher;
• Wiping the wall with a solution of cement and coarse sand, mixed in proportions of 1 to 1.5;
• Wetting the surface with water before finishing. But here you need to be careful and not overdo it, because when too much large quantities moisture, the plaster will simply slide off the wall.

Dry mix Adhesive plaster "Dali" designed for plastering buildings and structures insulated with expanded polystyrene boards (EPS).

PROPERTIES

• cement-based;
• convenient and reliable in operation;
• increased coating strength (up to 10 MPa);
• high adhesion index (up to 1.0 MPa);
• elastic (up to 2.5 MPa), water- and frost-resistant (up to 100 cycles).

application

Application area

Working conditions

Plastering works carry out in dry, windless weather at an ambient temperature from +5° to +35°C.

Surface preparation

PPS panels must be clean and free of PPS dust or other inclusions and must be pre-primed with PPS-Contact primer.

Preparation of the solution

Dissolve one bag of dry mixture weighing 25 kg in 4-5 l tap water, mix thoroughly and let stand for 15 minutes. Afterwards, stir the prepared solution again for 1.5 hours.

Application

Thickness of the applied layer of Dali adhesive plaster on polystyrene foam boards is 4-6 mm with an additional special reinforcing alkali-resistant polymer mesh in the plaster layer with a cell size of 4-6 mm (at the junction of the mesh there should be an overlap of at least 100 mm).

Drying time

The drying time of the plaster layer before subsequent painting is at least 2 days. The time for complete drying of the plaster is 28 days.

Consumption

STORAGE AND TRANSPORTATION CONDITIONS

Dry mixture Adhesive plaster Dali stored in closed branded kraft bags in dry rooms.

PACKAGE

bag 25 kg.

Best before date

12 months.

Ask your question about this product

Knauf Sevener - plaster adhesive mixture 25kg

KNAUF Sevener- dry lime-cement mixture for external and internal work. Contains special fibers and polymer additives that provide the finished solution layer with high adhesion, crack resistance and water-repellent properties. A special combination of binders with adhesive additives and fiber provides sufficient adhesion and gives the plaster layer increased strength and significantly higher crack resistance compared to already known solutions. the additive protects the insulation and masonry from getting wet and, due to the low resistance to diffusion of water vapor, does not worsen the residential microclimate. Sevener is used in the construction of external thermal insulation systems for buildings for gluing thermal insulating slabs made of polystyrene foam or mineral wool onto ordinary bases and applying a protective layer reinforced with fiberglass mesh to their surface, followed by coating with decorative plasters Diamant-240 and 260, etc. KNAUF Sevener can be used on structured, durable, dust-free mineral plasters and the same surfaces with dispersion coating or artificial-based plaster coatings (if necessary, after appropriate treatment).

Knauf Sevener can be used:

For repairing old (cracked) plaster facades buildings;

As a mortar under reinforcing mesh on hardened plaster when laying with mixed building materials;

As an adhesive bridge plaster for smooth and porous surfaces, etc.;

As a thin-layer intermediate layer of plaster for concrete surfaces.

Knauf Sevener is applied manually and mechanized way, for example, using continuously operating high-performance mortar mixing pumps, for example “G4” (G4), “G5” (G5), “Monojet” from PFT.

Consumption of materials

Depending on the type of work, the dry mixture per 1 m2 is:

Cladding with insulating boards on a smooth plaster surface ~ 3.5 kg

Cladding with masonry insulating boards ~ 6 kg

Applying a protective layer to the surface of insulating boards ~ 7 kg

Plastering a layer of old plaster over a grid ~ 5 kg

Preparing the base

Conditions of work

The temperature of the surface of the base and the air in the room should not be lower than +5°C.

Preparation of the base surface

Concrete, masonry or clean old plaster from dust.

Check the old plaster for strength and adhesion to the base.

Clean out potholes and pre-plaster them.

Strengthen chalking and crumbling surfaces with KNAUF-Tiefengrund primer.

Preparation of the solution

Mix the contents of a Knauf Sevene bag (30 kg) with 6.0 liters of water manually or using a drill with a mixing attachment. Leave for 15 minutes and stir again. Adding any materials is not allowed. When working with plastering machines, for example, from the PFT company, set the water dosage to about 320 liters and adjust the consistency of the solution.

Application of Knauf Sevener

Cladding with insulating boards

Apply Knauf Sevener mortar around the perimeter, as well as in the middle of the insulating board, in dots or in a continuous zigzag stripe. Bandwidth - approx. 5 cm, thickness - about 2 cm. Place the insulation board on the wall and level it. Further work with slabs, carry out after the solution has hardened (~ 48 hours).

Reinforcement of the surface of insulating boards

Apply KNAUF-Sevener mortar 5 mm thick and level with the rule. Install protective corners on the outer corners. Diagonally, at the corners of all openings, reinforce the surface of the insulating boards with strips of reinforcing fiberglass mesh measuring ~30x50 cm. Place reinforcing mesh in fresh mortar over the entire surface with an overlap of approx. 10 cm, while the solution should cover the mesh. If necessary, dowels are installed for additional fastening of the slabs. By continuing the work, allow the reinforcing layer to harden and dry for 8 days.

Repair solution

Thin-layer plaster on concrete

Apply KNAUF-Sevener with a thickness of 3.5 mm to a concrete surface cleaned of dust and smooth it. During the setting of the solution, when a certain surface hardness is reached, sagging forms.

Plaster-bridge

On a smooth surface of concrete, aerated concrete, etc. Apply an intermediate connecting plaster layer of KNAUF-Sevener up to 10 mm thick, smooth it and, no less than 3 days later, apply the KNAUF-LUP-222 solution.

Plastering on mesh

Apply Knauf-Sevener to the dry layer of plaster over the entire surface in a layer of ~ 3 mm. Lay strips of reinforcing mesh measuring ~30x50 cm along the corners of all openings. Lay reinforcing fiberglass mesh over the entire surface with an overlap of 10 cm. The next day, apply a layer of Knauf-Sevener mixture again with a thickness of ~2.3 mm. After the solution has set, rub the surface with a felt float. To produce paintable surfaces in an external insulation system, it is necessary to re-apply the KNAUF-Sevener solution and lay a fiberglass mesh in it with the joints offset relative to the first layer. After acquiring the required hardness, apply another Knauf-Sevener solution with a thickness of ~ 2.3 mm to this layer and, upon reaching the appropriate hardness, treat with a felt or sponge trowel. Upon completion of work, tools must be immediately washed with water.

Protect fresh plaster from frost and quick drying. The decorative coating should be applied only after the KNAUF-Sevener solution has hardened and dried. Before applying decorative KNAUF plasters For Diamant-240 and 260, coat the KNAUF-Sevener surface with KNAUF-Izogrund primer.

Packaging and storage Knauf Sevener

KNAUF-Sevener is packaged in 30 kg paper bags.

Store bags with plaster mixture in dry rooms on pallets. Pour the material from damaged bags into intact ones and use them first.

Shelf life in undamaged packaging is 6 months.

Plaster-adhesive mixture Knauf-Sevener

Application area

KNAUF-Sevener- dry cement-based mixture for external and internal work. Contains fractionated sand, special fibers and polymer additives that provide the finished mortar layer with high adhesion, crack resistance and water-repellent properties. The water-repellent additive protects the insulation and masonry from getting wet and, due to the low resistance to water vapor diffusion, does not worsen the residential microclimate. It is used in the construction of external thermal insulation systems for buildings for gluing thermal insulating slabs made of polystyrene foam or mineral wool onto ordinary bases and applying a protective layer reinforced with fiberglass mesh to their surface, followed by coating with decorative plasters KNAUF-Diamant 260, etc.

KNAUF-Sevener can be applied to structured, durable, dust-free mineral plasters and the same surfaces with dispersion coatings or plaster coatings based on artificial resins. (if necessary after appropriate processing). Can be used:

for repairing old (cracked) plaster surfaces of building facades, including structural plasters, without or with a durable paint coating;

as a mortar under reinforcing mesh on hardened plaster when laying with mixed building materials;

as an adhesive bridge plaster for surfaces of smooth and porous concrete, etc.; as a thin-layer intermediate layer of plaster for smooth concrete surfaces. Can be applied manually and using PFT G5, PFT G4, PFT Monojet plastering machines.

The product is manufactured with constant internal and independent (P certification) control.

Package

The KNAUF-Sevener mixture is packaged in 25 kg paper bags.

Storage

Store bags with KNAUF-Sevener dry mixture in dry rooms at wooden pallets. Empty the material from the damaged bags and use it first.

Shelf life in undamaged packaging is 12 months.

Consumption of materials

Cladding a flat surface of old plaster with insulating boards

Cladding with insulating boards on masonry

Applying a protective layer to the surface of insulating boards

Plastering a layer of old plaster over a grid

Plastering the surface of old structural plaster:

Preparing the base

Conditions of work

The temperature of the base and ambient air should not be lower than +5°C.

Preparation of the base surface

Clean concrete, masonry or old plaster from dust, if necessary, wash with water under pressure. Check the old plaster for strength and adhesion to the base. Clean out potholes and pre-plaster them. Surfaces of leveling plasters, before application mortar mixture KNAUF-Sevener, must dry. Strengthen chalking and crumbling surfaces with KNAUF-Tiefengrund primer.

Preparation of mortar mixture

Mix the contents of the bag (25 kg) with 5.0 liters of water manually or using a drill with a mixing attachment. Leave for 15 minutes and stir again. Adding any materials is not allowed! When working with plastering machines, for example, from PFT, set the water dosage to about 320 liters and adjust the consistency of the mortar mixture, increasing or decreasing the water supply.

Protect fresh plaster from frost and rapid drying.

The decorative coating should be applied only after the KNAUF-Sevener solution has hardened and dried.

Before applying KNAUF-Diamant 260 decorative plaster, coat the KNAUF-Sevener surface with KNAUF-Izogrund primer.

Application

Facing with insulating boards Apply KNAUF-Sevener mortar around the perimeter, as well as in the middle of the insulating board, in dots or in a continuous zigzag stripe. Bandwidth - approx. 5 cm, thickness - about 2 cm. Place the insulation board on the wall and level it. Further work with the slabs should be carried out after the solution has hardened (after 48 hours).

Reinforcement of the surface of insulating boards:

Apply the KNAUF-Sevener mortar mixture 5 mm thick and level it as usual. Install protective corners on the outer corners. Diagonally, at the corners of all openings, reinforce the surface of the insulating slabs with strips of reinforcing fiberglass mesh measuring 30x50 cm. Place the reinforcing mesh over the entire surface in a fresh mortar mixture with an overlap of approx. 10 cm. If necessary, dowels are installed for additional fastening of the slabs. Before continuing work, allow the reinforcing layer to harden and dry for 8 days. Repair solution

To level out structural irregularities, apply KNAUF-Sevener to cleaned or prepared surfaces of old plaster in a layer of up to 10 mm. If necessary, lay reinforcing mesh.

Thin-layer plaster on concrete: Apply KNAUF-Sevener with a thickness of 3-5 mm to a dust-free concrete surface and smooth it. During the setting of the mortar mixture, when a certain surface hardness is reached, remove the formed sagging. Plaster-bridge

On a smooth surface of concrete, aerated concrete, etc. Apply an intermediate connecting plaster layer of KNAUF-Sevener up to 10 mm thick, smooth it and, no less than 3 days later, apply KNAUF-LUP 222 solution.

Reinforcing the surface of plasters Apply KNAUF-Sevener to a dry layer of plaster over the entire surface with a layer of 3 mm. Lay strips of reinforcing mesh measuring 30x50 cm diagonally relative to the corners of all openings. Lay reinforcing fiberglass mesh over the entire surface with an overlap of 10 cm. The next day, once again apply a layer of Knauf-Sevener mixture 2-3 mm thick. After the solution has set, rub the surface with a felt float. Additional reinforcement In the case of manufacturing rubbed surfaces for painting in an external insulation system, it is necessary to re-apply KNAUF-Sevener and lay a fiberglass mesh in it with the joints offset relative to the first layer. After acquiring the required hardness, apply Knauf-Sevener again with a thickness of 2-3 mm to this layer and, upon reaching the appropriate hardness, treat with a felt or sponge trowel.

Upon completion of work, tools must be immediately washed with water.

Mechanisms

Plastering machines PFT G5,

PFT G4, PFT Monojet.

Screw pair D4-3.

Rotoquirl mixer.

Equipment and tools

Plaster mixer (N > 800 W)

Plastic tank

Stainless steel trowel

Sokol plastering

Rule (h-profile) aluminum

Felt or sponge grater

Toothed metal spatula

Metal lattice grater (Rabbo)

Specifications

KNAUF-Sevener is used:

• when installing external thermal insulation systems for buildings for gluing thermal insulating slabs made of polystyrene foam or mineral wool onto ordinary wall bases and applying a protective layer reinforced with fiberglass mesh to their surface, followed by coating with KNAUF-Diamant decorative plasters, etc.;
• for repairing old (cracked) plaster surfaces of building facades, including structural plasters, without or with a durable paint coating;
• as an adhesive bridge plaster for surfaces of smooth and porous concrete, etc.;
• as a thin-layer intermediate layer of plaster for smooth concrete surfaces. Knauf-Sevener can be applied to structured, durable, dust-free mineral plasters and the same surfaces with dispersion coatings or plaster coatings based on artificial resins (if necessary, after appropriate treatment).

Application process includes the following stages of work:

• Preparation of the base surface.
• Preparation of the solution.
• Application of the solution. The mixture is applied manually and mechanized, for example, using continuously operating high-performance mortar mixing pumps, for example, G4, G5, Monojet from PFT.

Depending on the type of work, the consumption of dry mixture per 1 m2 is:

• for cladding flat surfaces with insulating boards ~ 3.5 kg
• for facing masonry with insulating boards ~ 6 kg
• for applying a protective layer to the surface of insulating boards ~ 7 kg
• for plastering on a grid layer of old plaster ~ 5 kg for plastering the surface of old structural plaster: ~ 5-10 kg
• Cladding with insulating boards.
• Reinforcement of the surface of insulating boards.
• Repair solution.
• Thin-layer plaster on concrete, plaster-bridge.
• Reinforcement of the surface of plasters.

For the convenience of purchasing the Knauf plaster-adhesive mixture material, we provide the following service:

• Delivery and unloading of material on site
• Calculation of the amount of material you need
• Professional advice from a technical specialist
• Departure of our professional manager to the object
• Providing deferred payment

Found T-117 coverplix plaster-adhesive mixture 25kg, price, buy

OSNOVIT CAVEPLIX T-117

PLASTER AND GLUE MIXTURE

Installation of thermal insulation boards

Creating a base plaster layer

High vapor permeability

Weather resistance

SCOPE OF APPLICATION: The plaster-adhesive mixture KAVERPLIX T-117 is intended for installation of polystyrene foam and mineral wool slabs, creating a reinforced base plaster layer. Recommended for creating “breathable” insulation systems for facades of both new and old buildings. It is used when installing the OSNOVIT façade thermal insulation system. For interior and exterior use.

PROPERTIES: The plaster-adhesive mixture OSNOVIT KAVERPLIX T-117 is made on the basis of cement, fractionated sand and modifying additives. The product has the following properties:

• High adhesion strength to the insulation board and base
• High vapor permeability
• High frost resistance
• Wide temperature Range operation

SPECIFICATIONS:

Brand compressive strength

≥10 MPa Bending strength ≥4 MPa Adhesion strength to concrete ≥0.8 MPa Adhesion strength to a heat-insulating board ≥0.12 MPa Water consumption per 1 kg of dry mixture 0.20-0.24 l Mixture consumption for a layer of 1 mm 1 ,3-1.5 kg/m² Recommended thickness of the adhesive layer 3-20 mm Open time 20 minutes Slab adjustment time 15 minutes Contact area 90% Solution pot life 1 hour Water absorption by mass ≤15% Vapor permeability coefficient ≥0.1 mg/m h Pa Frost resistance 75 cycles Operating temperature -40...+70 ˚С Shelf life 12 months 25 kg

INSTRUCTIONS FOR USE

Preparing the base Before applying the plaster-adhesive mixture, it is necessary to remove crumbling elements, oil stains and other contaminants from the surface that prevent the adhesion of the material to the surface. For pre-leveling surface and to eliminate significant unevenness, it is recommended to use the appropriate OSNOVIT plaster. To enhance the adhesion strength of the material to the base, treat the surface with appropriate OSNOVIT primer. The surface is ready to apply the material only after the soil has completely dried.

When subsequently installing a reinforced base plaster layer, thoroughly clean the surface of the heat-insulating boards from dust with a brush.

Preparation of the solution To prepare the solution, pour the contents of the bag into a container with constant stirring. clean water at the rate of 1 kg of dry mixture per 0.20-0.24 l clean water(for 1 bag of 25 kg - 5-6 liters of water) and mix until a homogeneous mass is formed. Mixing is done with a professional mixer or electric drill with an attachment. The solution must be kept for 3-5 minutes, then mixed again. After this, the solution is ready for use.

The solution can be used within 1 hour from the moment of mixing with water. When the viscosity of the solution in the container increases (within the pot life time), it is necessary to mix it thoroughly without adding water.

Execution of work:

Fastening thermal insulation boards

The adhesive solution can be applied to the surface of the insulation different ways. If the base is uneven with a depth of more than 3 mm, the adhesive solution is applied to the surface of the insulation using a trowel along the perimeter of the slab in a continuous strip, as well as dotted in the center. The width of the continuous strip is 3-4 cm, the thickness of the adhesive layer is about 20 mm. If the base is uneven, less

A 3 mm adhesive solution is applied using a notched trowel or trowel evenly over the entire surface of the slab.

Immediately after applying the adhesive solution, the plate is applied to the surface and pressed tightly. The plate adjustment time is 15 minutes. The insulation boards are attached in one plane, with T-shaped dressing of the seams, close to one another. The gap between the plates is no more than 2-3 mm. Subsequent work on installing dowels and constructing the base layer can be carried out no earlier than after 2-3 days.

Construction of a reinforced base plaster layer

Using a notched trowel or trowel, the plaster-adhesive solution is applied thin layer onto the surface of the slab and spread evenly. Reinforcing fiberglass mesh (with an overlap of at least 10 cm) is laid on a freshly applied plaster layer, “sinked” into it and smoothed so that the mesh is in the middle of the base layer.

Consumption 1.3-1.5 kg of dry mixture per 1 m² with an application layer of 1 mm.

1. The base must be dry and durable. Brickwork, concrete bases and mineral plasters must be cured for at least 28 days
2. To prepare the solution, use only clean containers, tools and water.
3. Time to use the finished solution is about 1 hour
4. Mechanized application of the mixture is allowed using plastering and mortar stations and a special glue gun
5. When using mineral wool as a thermal insulation material, it is recommended to pre-prime the surface of the slabs with a thin layer of mortar
6. During work and in the next two days, the temperature of the environment and the base should not be lower than +5ºС and not higher than +30ºС
7. During the hardening process, the surface must be protected from intense drying: avoid contact with direct sun rays, water and exposure to drafts
8. Application of decorative plasters, paints and varnishes and other finishing decorative coatings produced no earlier than 2-3 days later

System TN-FACADE Decor 1 - outer wall; 2 - strengthening primer (if necessary); 3 - glue for thermal insulation boards; 4 - insulation from stone wool Technofas Cottage; 5 - disc-shaped façade dowel; 6 - base plaster-adhesive reinforcing layer; 7 - fiberglass mesh; 8 - quartz primer; 9 - decorative plaster; 10 - facade paint(if it is needed). Photo: TECHNONICOL

Majority large manufacturers thermal insulation materials and building mixtures offer efficient buildings. One of the most popular in private housing construction consists of (expanded polystyrene or mineral wool), which are attached to the walls special glue and dowels. The outer layer of the fixed insulation is first protected with a plaster-adhesive composition reinforced with a special fiberglass mesh, after which a decorative coating is applied.

Living in a house insulated in this way is comfortable. The costs of heating and air conditioning are reduced, and the façade takes on a new, original look.

The maintenance-free service life of the system is at least 25 years. In its multilayer design, there are practically no rigid connections that could become cold bridges. Heat losses through dowels are so insignificant that they are not taken into account in thermal calculations.

Types of adhesive mixtures

Universal glue

Polyurethane adhesive Fastfix (Penoplex) (750 ml pack - 300 RUR). Polyurethane adhesive Ceresit CT 84 (Henkel) (850 ml pack - 550 RUR). Foam adhesive for polystyrene foam (TECHNONICOL) (750 ml pack - 326 RUR). Photo: Penoplex, Henkel, TECHNONICOL

To an inexperienced buyer it seems that for the system facade insulation mixtures of two types are required. The first is adhesive, for fixing insulation boards to the wall surface. The second is plaster and adhesive, to create a base layer under. Having studied the assortment, he understands that there are special adhesive and plaster-adhesive mixtures on the market, designed for a specific type of insulation (expanded polystyrene or mineral wool), and universal ones. If the masters do not have time to finish construction works with the onset of cold weather, you will have to use “winter” modifications of these compounds.

Installation of facade thermal insulation systems begins after completion of the internal wet work and drying the building, as well as installing window and door units.

Work with the plaster-adhesive mixture is carried out at air and base temperatures from 5 to 30 °C. Photo: ShutterStock/Fotodom.ru

Taking into account all the nuances of the construction process, from unevenness of the base to the timing of work, and exact calculation quantities Supplies seem like an impossible task. However, leading manufacturers of dry mixes have taken these circumstances into account. In order not to have to worry about choosing and calculating the volume of required dry mixtures, they suggest choosing one - universal. Essentially, it's glue and plaster rolled into one. The composition equally successfully fixes polystyrene foam and mineral wool slabs to the base and forms a reliable and durable base layer.

How to prepare the mixture

The cement-based plaster-adhesive mixture contains sand of different fractions, reinforcing fibers and polymer additives. The distributed adhesive solution provides sufficient adhesion to the base, and the base layer is durable, resistant to cracking, with good water-repellent properties.

The manufacturer guarantees the beneficial qualities of the mixture only when it is proper preparation. Pour the amount of clean water indicated on the packaging into a large container (at least 25 l). room temperature. Then the plaster-adhesive composition is gradually added to the water, constantly stirring the mass with a mixer or drill with a special attachment so that lumps do not form. Moreover, they act only in this sequence, and not vice versa. The mixer rotation speed should not exceed 400–800 rpm (as recommended on the package), otherwise the mixture may separate. After a technological pause (5 minutes), which is necessary for the solution to mature, it is mixed again. If it becomes thicker during operation, the consistency is restored by repeated stirring. You cannot add water to the mixture.

At the corners of windows and doorways Thermal insulation slabs should not form continuous horizontal or vertical joints. In these places, slabs with an angular cutout are installed. Moreover, they are positioned so that the joints of the seams with the adjacent elements are at a distance of at least 150 mm from the corner of the opening. Photo: Saint-Gobain

Polyurethane glue

Polyurethane glue in a can - effective remedy fastening of thermal insulation boards made of extruded and foamed polystyrene foam. The composition has high adhesion to plastered substrates, as well as surfaces made of metal, brick, wood, stone and various concretes. The glue in the bottle does not take up much space and is easy to deliver to the site. It is convenient and easy to use and does not require any special skills. There are no dusty or dirty preparatory work necessary when mixing dry plaster-cement mixtures with water. The only limitation is that the insulation material is only polystyrene foam.

Under no circumstances should the reinforcing mesh be laid directly on the thermal insulation layer. It should be inside the plaster-adhesive layer and in correct position not visible on its surface.

Compared to dry mixtures, adhesives from a balloon reduce transportation and storage costs, reduce time and labor intensity installation work. The material is very economical: one cylinder is enough to fix 6–12 m² of slabs. Photo: Henkel

How to apply glue

A cement adhesive solution is applied to the surface of the insulation boards different ways depending on the unevenness of the base. Beacon is used for wall unevenness of 5 mm or more. The mixture is distributed around the perimeter of the slab and laid out with several beacons in the center. Solid is used on surfaces with unevenness up to 5 mm, using a notched trowel. In both cases, the surface of the mineral wool insulation is pre-primed with a thin layer of the same adhesive solution. After installing the element, excess glue extending beyond its contour is removed.

After installing the slab in the design position, the adhesive contact area must be at least 40% of the bonded surface. Photo: KNAUF

To create a protective reinforced layer, the glued insulation is covered with a plaster-adhesive composition 2–3 mm thick. Then the fiberglass mesh sheets are embedded in it and the mixture is applied again to a thickness of up to 3 mm, smoothing it so that the mesh is not visible. Surface unevenness is leveled with an abrasive float after 24 hours.