The UZIN NC 105 is a self-leveling gypsum compound based on calcium sulfate for layer thicknesses of up to 15 mm. The product has excellent flow properties and forms a smooth, virtually stress-free surface after drying.
Because virtually no stress develops during the drying process, UZIN NC 105 is particularly suitable for anhydrite floors, renovation substrates, and substrates susceptible to deformation. Even with thicker leveling layers and longer drying times, the risk of cracking remains limited.
The leveling compound is suitable for manual application and pumping and can be used indoors in residential and commercial areas subject to medium traffic.
Key properties
- Self-leveling gypsum compound
- Calcium sulfate-based
- Suitable for layer thicknesses of up to 15 mm
- Excellent flow properties
- Forms a smooth surface
- Dries with virtually no shrinkage stress
- Suitable for critical renovation substrates
- Suitable for manual application and pumping
- Working time of approximately 30 minutes
- Walkable after approximately 3 hours
- Ready for covering after approximately 24 hours at a layer thickness of up to 3 mm
- Suitable for underfloor heating
- For indoor use
The stated times apply at approximately 20 °C and a relative humidity of 65%. Temperature, humidity, and layer thickness can affect the drying time.
Suitable substrates
UZIN NC 105 can be used, in combination with the correct preparation and primer, on, among others:
- Anhydrite and calcium sulfate screeds
- Cement-based screeds
- Concrete
- Ceramic tile floors
- Natural stone floors
- Terrazzo floors
- Mastic asphalt
- Magnesite and wood magnesite
- Old leveling layers
- Substrates with well-adhering adhesive residues
- Old and mixed renovation substrates
The leveling compound is suitable as a substrate for textile and resilient floor coverings. Do not use the product under parquet or synthetic resin-based poured floors without additional technical advice.
From a layer thickness of 1 mm, the leveling compound is suitable for loads from castor wheels in accordance with DIN EN 12529.
Substrate preparation
The substrate must be compression-resistant and dimensionally stable, permanently dry, clean, and free of cracks. Dust, dirt, grease, loose particles, and other substances that could reduce adhesion must be completely removed.
Calcium sulfate and anhydrite screeds must be checked for weak surface layers. Remove them if necessary by wire brushing or sanding. Then vacuum the substrate thoroughly.
Treat the substrate with a suitable primer. A properly applied and fully dried primer promotes adhesion, prevents the mixing water from being absorbed too quickly, and reduces the risk of air craters and pinholes.
Mixing and application
Pour 4.4 litres of clean, cold water into a clean mixing tub. Then gradually add the entire contents of the 20 kg bag.
Mix the material mechanically with a suitable basket mixer until a smooth, homogeneous and lump-free compound is obtained. Then pour the levelling compound onto the substrate and spread it evenly with a smoothing trowel or levelling rake.
Immediately after spreading, use a spiked roller to remove air bubbles and achieve an even surface.
Preferably do not sand the dry levelling layer. If sanding is nevertheless necessary, the surface must then be thoroughly vacuumed. If specified, apply a thin coat of UZIN PE 360 PLUS to the surface before bonding, diluted with water at a ratio of 1:1, and allow it to dry for at least one hour.
Consumption
The average consumption is approximately 1.6 kg per m² per millimetre of layer thickness.
| Layer thickness | Consumption | Area per 20 kg bag |
|---|---|---|
| 1 mm | approximately 1.6 kg/m² | approximately 12.5 m² |
| 3 mm | approximately 4.8 kg/m² | approximately 4.2 m² |
| 10 mm | approximately 16 kg/m² | approximately 1.25 m² |
Note: the table you provided still included surface areas applicable to a 25 kg bag. For a Dutch 20 kg bag, the calculations above are correct.
Drying time
| Layer thickness | Indicative drying time |
|---|---|
| Up to 3 mm | approximately 24 hours |
| Thicker layers | longer, depending on each additional millimetre |
For thicker layers, always check that the levelling layer is sufficiently dry before bonding. Climate, substrate and ventilation affect the drying time.
Technical data
Product type: self-levelling gypsum compound
Binder: calcium sulphate
Packaging: 20 kg paper bag
Colour: medium grey
Maximum layer thickness: 15 mm
Water quantity: 4.4 litres per bag
Consumption: approximately 1.6 kg/m² per mm layer thickness
Working time: approximately 30 minutes
Walkable: after approximately 3 hours
Ready for covering: after approximately 24 hours at a maximum thickness of 3 mm
Ideal application temperature: 15 to 25 °C
Minimum floor temperature: 15 °C
Fire classification: A1fl
Shelf life: at least 12 months
Quantity per pallet: 54 bags
Certification: EMICODE EC 1 PLUS
Why choose UZIN NC 105?
UZIN NC 105 is a suitable choice for virtually stress-free levelling of anhydrite floors and critical renovation substrates. Its excellent flow properties ensure a smooth surface, while the calcium sulphate binder limits the risk of stress and cracking.
This often makes it possible to retain existing substrates during renovations, saving time, demolition work and buildup height.
