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2799
COARSE FINISHING PLASTER
Formerly 508
Coarse naturally coloured facade
Mineral finishing plaster for a very rough surface
- Mineral rough finishing plaster with attractive look.
- Available in three colours: White, grey and travertine.
- With hydrophilic effect: Very fast drying. Prevents mould and algae growth.
- Processable with grid rabot to achieve unique surface designs.
Area of application
- Outdoors: wall + ceiling
- Indoor: wall + ceiling
- Suitable for monuments and historical buildings
- Vapour permeable
Processing method
- For hand and machine processing
- For finishing treatment of facades.
- For new buildings and renovations.
- For historic buildings.
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 products and efflorescence. It must be sufficiently rough, dry and evenly absorbent. The surface shall not be frozen or water-repellent. The substrate must be volumetrically stable and have the required flatness.
Substrate preparation
Depending on substrate's water absorption and climatic conditions, use Cemix primer on absorbent substrates, roughen smooth substrates or use Cemix contact bridge. For non-standard substrates, modify with a suitable method to achieve the desired properties. Smooth out unevennesses of the substrate with suitable Cemix materials and allow to dry and cure. The substrate shall comply with applicable regulations, standards, or material manufacturer's recommendations.
Preparation of the mixture
Pour 25 KG OF CEMIX 2799 COARSE FINISHING PLASTER into 4 - 5 L of clean water. Mix for 5 minutes with a slow-speed paddle mixer to a homogeneous mixture without lumps. Leave to rest for 3 minutes. Then mix again briefly. Use suitable machinery when processing by machine. For a uniform appearance of a larger area, mix multiple bags into one large container. Always ensure that coloured material is from one production batch.
Water demand
| Quantity | Liters (Min) | Liters (Max) |
|---|---|---|
| 1 kg | 0.16 L | 0.2 L |
| 25 kg | 4 L | 5 L |
Mixing
Mixing time
5 min
Mixing speed in Rpm
800x/min
Ripe time
3 min
Processing instructions
Scratchy application:
Apply the material onto the matt damp substrate with a trowel or other suitable tool. The surface is then leveled with a stainless steel trowel. Allow the layer to set. Scrape off the surface with a grid rabot (always in one direction) until the surface is evenly textured and leveled.
Spray application:
For sprayed application, use plastering hand machine for coarse finishing plaster. After application, the surface is not further modified.
Protect the applied material from fast drying, direct sun, rain and frost. Before processing the product, read the information in the technical data sheet.
Application thickness
| Minimum layer thickness | 4 mm |
|---|---|
| Maximum layer thickness | 15 mm |
Consumption
Material consumption min.
1.7
Material consumption max.
-
Material consumption in measuring unit
kg/m²/mm
Consumption renders
| Structure | Consumption in Kg per m² |
|---|---|
| Stříkaný povrch (tl. cca. 4 mm) | cca. 6,8 kg/m2 |
| Škrábaný povrch (tl. po škrábání je 10 mm, tl. před škrábáním je 15 mm) | cca. 25,5 kg/m2 |
Yield
| Material consumption | at | unit | Yield |
|---|---|---|---|
| 25 kg - stříkaná varianta | 4 | mm | 3,68 m2 |
| 25 kg - škrábaná varianta | 15 | mm | 0,98 m2 |
Working time (potlife)
120 min
Treatment after application
Avoid the negative effects of sun, heat, humidity and draughts. 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 | White cement |
| Made of material | Mineral filler, lime hydrate, pigments, additives improving the processing and useful properties of the mortar. |
| Flammability class | A1 |
| Max. grain size | 4mm |
| Thermal conductivity λ in W/(m.K) | 0.95 |
| Water vapour diffusion resistance factor µ | 35 |
| Dry bulk density in Kg/m³ | 1500 |
| Dry bulk density in Kg/m³ to | 1700 |
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