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5570
NIVELA RAPID 25 MPa
For perfectly flat floors
in just 4 hours !
- Self-levelling compound for perfectly flat floors. Levels unevenesses of 1-30 mm application thickness.
- Fast-setting: Walkable after 4hrs at 10mm layer thickness.
- For high resistance to rolling wheel, e.g. office chair castors.
- Gypsum based: Highly flexible and crack-reducing, enabling thermal expansion.
- Suitable for Anhydrite screeds (Calciumsulfat).
- Creates a smooth and compact surface, ideal for thin vinyl covering.
- Suitable over low profile floor heating.
- For floor renovations: To create bondable substrates over old screeds with residues of only water-nonsoluble adhesives.
Area of application
- Indoor: floor
Heating and cooling area
- Floor
Processing method
- For hand and machine processing
- For levelling floors in the interior before laying floor coverings (tiles, floating floors, vinyl, carpets, PVC, etc.) during the construction of apartments, offices, administrative buildings, hotels, schools, etc.
- For watering electric heating registers for watering selected hot-water low-profile heating registers.
- As a combined levelling floor layer on concrete, cement or calcium sulphate (anhydrite) screeds.
- For levelling lightweight screeds and problematic substrates.
RECOMMENDED SYSTEM PRODUCTS
Processing details
Learn more about technical details for processing this product.
Substrate requirement
The substrate must comply with the applicable standards, must be solid, free of loose particles, free of dust, paint, residues of demoulding substances and efflorescence. It must be sufficiently rough, dry and evenly absorbent. The surface shall not be frozen or water-repellent. The substrate must be stable in volume and must have the required flatness.
Substrate preparation
Depending on substrate water absorption and climatic conditions, the following is needed: Use Cemix 5400 primer on absorbent substrates, roughen smooth substrates or use Cemix 8040 contact bridge. If necessary, for non-standard substrates, modify with a suitable method to achieve the desired properties. Smooth out large unevenness in the substrate with suitable Cemix materials and allow to dry and cure. The substrate shall comply with applicable codes, standards, or material manufacturer's recommendations.
Preparation of the mixture
Prepare the material by pouring the dry mixture into the prescribed amount of water and mixing it. Use potable water or water complying with EN 1008 to mix the mixture. Mix using a slow speed paddle mixer. Mix to a homogeneous, lump-free mixture and leave to rest. Then mix again briefly. Use suitable machinery when machine processing.
Water demand
| Quantity | Liters (Min) | Liters (Max) |
|---|---|---|
| 25 kg | 5.5 L | 6 L |
Mixing
Mixing time
5 min
Mixing speed in Rpm
800x/min
Ripe time
3 min
Processing instructions
After spreading evenly over the substrate, the layer is spread to the desired thickness using a fine-toothed squeegee or trowel. The laid mixture is then blown off with a roller, which also helps to level it. In the case of machine processing, the mixing is carried out, for example, with an m-tec duo-mix with accessories recommended by the manufacturer for the application of self-levelling floor compounds. The hose outlet must be equipped by a filter to catch dirt.
The screed can be used to water electric heating floor mats only under the conditions of strict compliance with the ramp-up cycles specified by the heating mat manufacturer. The covering layer of the squeegee must be at least three times the thickness of the heated cable.
In the case of multi-layered screed, the previous layer must be allowed to dry (to a maximum permissible moisture content of 0.5 % by weight), the substrate surface must be sanded, vacuumed and primed with Cemix 5400.
Application thickness
| Minimum layer thickness | 1 mm |
|---|---|
| Recommended layer thickness | 5 mm |
| Maximum layer thickness | 30 mm |
Consumption
Material consumption min.
1.7
Material consumption max.
-
Material consumption in measuring unit
kg/m²/mm
Yield
| Material consumption | at | unit | Yield |
|---|---|---|---|
| 25 kg | 5 | MM | 2.9 m² |
Working time (potlife)
20 min
Walkability after
4 h
Treatment after application
After application, direct negative effects of sun, heat, humidity and draughts should be avoided for 24 hours. Protect from frost and rain. Direct heating of the surface is prohibited. The surface is walkable in approx. 4 hours after application, full load after laying floor coverings. Laying of floor coverings can be carried out after the trowel has dried to the required level according to EN 74 4505. Under normal conditions the screed requires 1 day per 1-2 mm thickness to dry to equilibrium moisture content.
Tool and cleaning instructions
Wash off tools with water immediately after finishing work. Clean dried residues mechanically.
Technical parameters
| Main binder | Gypsum |
| Made of material | Mineral filler, calcium sulphate and additives improving the processing and utility properties of the material. |
| Flammability class | A1fl |
| Max. grain size | 0,4mm |
| Full load after | 7 d |
| Compressive strength 28 days in N/mm² | 25 N/mm² |
| Flexural strength 28 days in N/mm² | 5 N/mm² |
| Thermal conductivity λ in W/(m.K) | 1.05 |
| Dry bulk density in Kg/m³ | 1700 |
| Dry bulk density in Kg/m³ to | 1900 |
| Release of corrosive substances | CA |
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