2142
RENOVATION RENDER
Formerly Name change (available during the year). Previous product 2742.
Resists moisture, salts and repels water
Old beautiful again
- For the renovation of highly saline and wet masonry in old buildings.
- Highly porous: Stores harmful salts in its open-pored structure.
- Highly vapour permeable: Does not retain water and moisture
Area of application
- Outdoors: wall + ceiling
- Indoor: wall + ceiling
- For plinth
- Meets WTA requirements
- Vapour permeable
Processing method
- For hand and machine processing
- For levelling the substrate during the rehabilitation of wet masonry.
- For highly saline and wet structures.
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.
Substrate preparation
The layer of degraded plaster is removed to a height of at least 800 mm (for masonry thicknesses of more than 600 mm to a height equal to 1 ½ times the masonry thickness) above the visible limit of damage (damping). The joints are scraped to a depth of approx. 20 mm (depending on the static condition of the masonry). Cracks in the masonry and significant irregularities caused by loose bricks are repaired or filled with the previously recommended Cemix mortar.
Depending on the absorbency of the substrate and the climatic conditions, it needs to be moistened. On substrate apply Cemix 2140 (2740) pre-sprinkler or Cemix 2141 (2741) sanation underlayment render to the substrate in accordance with the recommended Cemix sanation system composition. If necessary, treat non-standard substrates with a suitable method to achieve the desired properties. The substrate must comply with applicable regulations, 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 propeller mixer. Mix to a homogeneous, lump-free mixture and leave to rest. Then mix again briefly. Use suitable machinery when processing by machine.
Water demand
| Quantity | Liters (Min) | Liters (Max) |
|---|---|---|
| 1 kg | 0.24 L | 0.28 L |
| 25 kg | 6 L | 7 L |
Mixing
Processing instructions
Apply the plaster to the surface with a trowel or other suitable tool. Then roughly flatten the surface with a squeegee to the desired level. Once the plaster has set, open the plaster flat with a suitable tool. A minimum curing time of 1 day per 1 mm of applied layer is considered. The plaster forms a base and levelling layer for the stucco or final finish. The plaster must not be left untreated in the exterior for long periods (especially over the winter period).
Application thickness
| Minimum layer thickness | 15 mm |
|---|---|
| Recommended layer thickness | 20 mm |
| Maximum layer thickness | 25 mm |
Consumption
Consumption renders
| Structure | Consumption in Kg per m² |
|---|---|
| Sanační omítka v tl. 20 mm | 21 |
Yield
| Material consumption | at | unit | Yield |
|---|---|---|---|
| 25 kg | 20 | mm | 1,19 m² |
Working time (potlife)
90 min
Treatment after application
Non-absorbent materials prolong the maturation period.
After application, the direct negative effects of sun, heat, humidity and draughts should be avoided. Protect from frost and rain. Direct heating of the surface is prohibited.
Tool and cleaning instructions
Wash off tools with water immediately after finishing work. Clean dried residues mechanically.
Technical parameters
| Main binder | Grey cement |
| Made of material | Mineral filler, cement, lime hydrate and special additives to improve processing and performance properties. |
| Flammability class | A1 |
| Max. grain size | 1,2mm |
| Adhesion after dry storage in ≥N/mm²(ETAG004) | 0.2 |
| Thermal conductivity λ in W/(m.K) | 0.36 |
| Water vapour diffusion resistance factor µ | 12 |
| Dry bulk density in Kg/m³ | 1100 |
| Dry bulk density in Kg/m³ to | 1400 |
| Wet density in Kg/m³ from | 1150 |
| Wet density in Kg/m³ to | 1400 |
Download
Contact: Can we help you?
Ask us your question. Write to us whenever you want. We will reply within 48 working hours.
Telephone 800 022 848
Contact us on the toll-free Customer hotline
- Opening hours: weekdays 7:30 a.m.–3:00 p.m.
- Email: info@cemix.cz