Stucco Knauf - the choice of professionals
Each builder-finisher knows well that the best quality when leveling the walls can be achieved by using materials from one manufacturer adapted for each other for all stages of work.
Unfortunately, not all manufacturers produce a full range of all necessary components and not everyone can boast of excellent product quality. But this does not apply to Knauf brand products - cement, gypsum, polymer plaster, primers, impregnations and other materials of this company deserve the highest rating.
In this article we will try to give a brief but detailed analysis of dry building mixes from Knauf, or rather cement and gypsum plasters, with which you can solve many problems. Among them: repair and repair of cracks, rough and finish alignment of the bases, insulation, decorative finish, etc.
The content of the article
Cement-based plasters
Until recently, this brand in our country was represented mainly by gypsum materials, including dry mixes, drywall and its components. Now Knauf cement plaster, represented by several types, has gained wide popularity.
Unterputz
This is a dry cement mixture with fractionated sand and special additives that increase the ductility of the material and the water-repellent ability of the coating. The solution prepared from it can be applied either manually or by machine.
Application area:
- For outdoor work - plastering of facades (see Exterior wall plastering: traditional facade finish), creating bases for decorative coatings;
- For interior work - plastering walls in rooms with high humidity (industrial premises, basements, laundries, etc.).
Plaster can be applied with a layer of 10 mm to 20 mm, the total thickness of the multilayer coating can reach 35 mm. Dry mix consumption per 1 sq.m. with a layer thickness of 10 mm is 17 kg.
The advantages of the material in addition to water resistance, strength and ductility include the absence of shrinkage and the appearance of cracks upon drying, the possibility of thin-layer application.
Specifications:
| Characteristics | Value |
| Water retention capacity | >98% |
| Grain | Up to 1,5 mm |
| Solution viability | 1.5-2 hours |
| Frost resistance | > 25 cycles |
| Traction strength | > 0.4 MPa |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 2.5 MPa |
Knauf Unterputts cement plaster is available in 25 kg paper bags. Shelf life 1 year.
Grunband
In addition to cement and sand, the composition of this plaster includes various additives and a lightweight aggregate in the form of polystyrene foam granules, which gives it heat-insulating properties. The solution can be applied both manually and by machine.
Application area:
- For external works - plastering of facades, creation of the bases for decorative coverings (ceramic tile, artificial stone, Plaster Diamond Knauf, etc.);
- For interior work - finishing ceilings and walls in wet rooms.
Note. The basis for application may be concrete, silicate and ceramic bricks, foam concrete, expanded clay concrete, aerated concrete blocks.
Permissible layer thickness is 10-30 mm. Dry mix consumption per 1 sq.m. with a layer thickness of 10 mm is 12 kg.
Advantages of the material: good vapor permeability, thermal insulation properties, the absence of cracks, ease of application, the ability to protect walls from atmospheric influences.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | Up to 1,5 mm |
| Thermal conductivity | <0.35 W / m ° C |
| Frost resistance | > 35 cycles |
| Density | 3 |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 3.4 MPa |
| Traction strength | > 0.4 MPa |
Release form Knauf Grunband plasters - paper bags of 25 kg. Shelf life 1 year.
Sockelputz
Extra strong cement mix with special additives and fractionated sand for manual and mechanized application.
Application area:
- For external works - plastering of facades and socles, including for subsequent decorative finishing;
- For internal work - plastering walls in rooms with high humidity (industrial premises, basements, laundries, etc.).
Plaster can be applied with a layer of 10 mm to 15 mm, the total thickness of the multilayer coating can reach 35 mm. Dry mix consumption per 1 sq.m. with a layer thickness of 10 mm is 17 kg.
| Characteristics | Value |
| Water retention capacity | >98% |
| Grain | Up to 1,5 mm |
| Solution viability | 1.5-2 hours |
| Frost resistance | > 25 cycles |
| Traction strength | > 0.4 MPa |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 7.5 MPa |
Zockelputts cement plaster is available in 25 kg paper bags. Shelf life 1 year.
Sevener
Dry plaster-glue mixture with fractionated sand, polymer additives and special fibers for DIY application.
Application area:
- Repair of old plaster on the facades of buildings;
- Gluing to the base of heat-insulating polystyrene or mineral wool boards, as well as applying over the insulation to create a protective layer with a reinforcing fiberglass mesh;
- Intermediate bonding layer on porous or smooth concrete surfaces.
Mixture consumption per 1 sq.m. depends on the method of application of the solution:
- For gluing insulating boards on masonry - 6 kg;
- For gluing insulation boards to a flat surface - 3.5 kg;
- For the device of the protective layer for thermal insulation - 7 kg;
- For the repair of old plaster with the application of mortar on a grid - 5-10 kg.
Due to the presence of special fibers, adhesive and water-repellent additives, Knauf Sevener plasters adhere firmly to the base, provide masonry or insulation with reliable protection against wetting, and the finished coating with increased strength and resistance to cracks.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | Up to 1,5 mm |
| Frost resistance | > 75 cycles |
| Density | 1600 kg / m3 |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 7.5 MPa |
Cevener cement plaster is available in 25 kg paper bags. Shelf life 1 year.
Adhesive
Cement plaster with quartz and limestone filler and chemical additives that increase the adhesive properties of the material. It is applied manually or by machine.
Scope: for spraying concrete, silicate, rubble and old brick substrates before applying leveling cement plasters on them.
Note. The adhesive improves adhesion of materials, creating a rough surface, and strengthens the base. The instruction recommends using this plaster instead of a metal reinforcing mesh when processing bases of silicate brick and smooth concrete.
Recommended layer thickness is 5 mm. The consumption of dry mix per 1 sq. M is 5-8 kg.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | 0-4 mm |
| Frost resistance | > 25 cycles |
| Density | 1600 kg / m3 |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 7.5 MPa |
Cement plaster. Adhesive is available in 25 kg paper bags. Shelf life 1 year.
Diamond
Decorative plaster Knauf Diamant - cement mixture with mineral granules for application on concrete, gypsum and cement substrates for the purpose of their decorative decoration. It forms a textured surface with a granular or furrowed structure. It is applied manually or mechanically.
The material is available in several colors:
- White;
- Citrus;
- Sahara;
- Light sugar;
- Emerald;
- Light emerald;
- Lapis lazuli;
- Light lapis lazuli.
For reference. Diamond - decorative Knauf plaster of white color, if necessary, can be tinted in a different tone by adding appropriate pigments to the mixture.
Application area:
- For outdoor works - decorative finish of concrete substrates and surfaces, plastered with all the above compounds;
- For internal works - decorative decoration of gypsum plasterboard walls and walls plastered with Knauf gypsum compositions (Rotband, Goldband, MP 75).
The main advantages are resistance to adverse weather conditions, protection of surfaces from getting wet.
Recommended layer thickness is 3-4 mm. The consumption of dry mix per 1 sq. M is 3.8 kg.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | 3 mm |
| Frost resistance | 50 cycles |
| Density | 1770 kg / m3 |
| Vapor permeability coefficient | > 0.1 mg / (m * h * Pa) |
| Compressive strength | > 3.5 MPa |
Packing Knauf Diamond 260 decorative plaster - 25 kg in a paper bag (one bag is enough for 6.5 sq.m.). Shelf life 1 year.
Gypsum-based plasters
Unlike cement, gypsum plasters are intended for use only in indoor heated rooms, as they do not withstand the aggressive effects of atmospheric phenomena.
For reference. The color of gypsum mixtures can vary from white to gray or brown. This does not affect their properties and is explained by the composition of impurities in natural gypsum stone.
Rotband
Universal gypsum plaster with improved adhesion with polymer additives. It is used for high-quality alignment of walls and ceilings, concrete surfaces, DSP, brick, cement plaster, polystyrene foam in rooms with normal and high humidity.
Benefits:
- Rothband Knauf - finishing plasternot requiring puttying, as the surface is smooth;
- Lower consumption compared to cement compounds;
- Possibility of applying at one time a layer with a thickness of 5 mm to 50 mm and thicker layers - in several passes;
Note! When leveling ceilings, the layer thickness should not exceed 15 mm.
- No cracks during drying at any layer thickness;
- Possibility of use for repair, restoration works and manufacturing of decorative coatings;
- Vapor permeability - gypsum coating “breathes”, regulating humidity conditions in the room;
- Environmental friendliness - only substances harmless to health are a part.
Dry mix consumption per 1 sq.m. with a layer thickness of 10 mm is 8.5 kg.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | <1.2 mm |
| Solid density | 950 kg / m3 |
| Bending strength | > 1.0 MPa |
| Compressive strength | > 2.5 MPa |
| Full strength set time | 7 days |
Available in paper bags of 5, 10, 25 and 30 kg. Shelf life 6 months.
Goldband
In its properties and characteristics, this composition differs little from the previous one. The difference is only in the density of the finished coating (Goldband has it higher - 980 kg / m3) and the minimum recommended layer thickness (8 mm).
The price of Goldband plaster is about 7-10% lower than Rotband.Available in paper bags of 30 kg. Shelf life 6 months.
MP 75
Knauf MP 75 - gypsum-based plaster with polymer additives for machine application. Designed for application to any solid mineral substrates.
Benefits:
- Productivity is several times higher than when applied manually;
- Universal plaster that does not require puttying, as the surface is smooth;
- Lower consumption compared to cement compounds;
- Possibility of applying a layer with a thickness of up to 50 mm and thicker layers in one go - in several passes
Note! When leveling ceilings, the recommended layer thickness is 8-15 mm, walls - 8-50 mm.
- No cracks during drying at any layer thickness;
- Possibility of use for repair, restoration works and manufacturing of decorative coatings;
- Vapor permeability - gypsum coating “breathes”, regulating humidity conditions in the room;
- Environmental friendliness - only substances harmless to health are a part.
Dry mix consumption per 1 sq.m. with a layer thickness of 10 mm is 8-9 kg.
Specifications:
| Characteristics | Value |
| Water absorption | <15% |
| Grain | <1.2 mm |
| Solid density | 1000 kg / m3 |
| Bending strength | > 1.0 MPa |
| Compressive strength | > 2.5 MPa |
| Full strength set time | 7 days |
Available in paper bags of 25 and 30 kg. Shelf life 6 months.
Conclusion
As you can see, the range of Knauf dry plaster mixes is very diverse, in it you can find the material that is most suitable for your purposes. Also under this brand are produced other materials necessary for the full cycle of finishing work - glues, putties, primers, etc.
You can get to know them better by watching the video in this article.
