TEKNOFLOOR 400F
Epoxy varnish TEKNOFLOOR Colour Sand Screed
- Intermediate
- Intermediate
TEKNOFLOOR Colour Sand Screed consists of solvent-free, two-pack TEKNOFLOOR 400F epoxy varnish and a mixture of coloured sand. The screed is applied in a thickness of 4 - 6 mm.
TEKNOFLOOR Colour Sand Screed is used for floors subjected to heavy abrasion or attacked by strong chemicals or hot water. Suitable areas of application are floors in food and meat processing plants, pulp and paper mills, chemical plants and dairies. TEKNOFLOOR Colour Sand Screed has excellent abrasion resistance due to its thick coat and high sand content. The surface of the coating is not slippery. In accordance with the Classification Standard SFS-EN 13501-1:2002 (Technical Research Centre of Finland, research Report RTE 4314/04) TEKNOFLOOR Colour Sand Screed's fire conduct is in category Bfl and the smoke formation is in category s1. TEKNOFLOOR 400F is suitable for use in food preparation and packaging environments (Smithers Rapra, Certificate Number GC0071). The product has CE approval for protection of concrete structures.
Technical data sheet
Safety data sheet
Other product specific documents
Surface preparation
NEW CONCRETE SURFACES: The concrete must be at least 4 weeks old and well-hardened so that all moisture from casting is bound and the surface dry. The moisture of the concrete must not exceed 97% as relative humidity or 4% by weight (by 54 / BLY 12).
Dense laitance is to be removed from steel-trowelled concrete by shot-blasting or surface grinding. Brittle and powdery top layers are treated so that the solid concrete containing aggregate is exposed. Thereafter all cement dust is removed by vacuum cleaner or brush. The concrete surface must be clean of anything that might hinder the adhesion.
OLD CONCRETE SURFACES: Uncoated, greasy floors are cleaned by emulsion wash. Thereafter laitance is removed by shot-blasting, scarifying, surface grinding or etching. Scarifying and shot-blasting are the best methods for removal of disrepair concrete or old flaking paint or composition layers.
The surface preparation method for both new and old concrete is chosen according to condition of the concrete and strain the floor will be exposed to. The best method for floors to be attacked by heavy abrasion, chemicals or hot water is scarifying or shot-blasting. Surface grinding is enough if the floor will be subjected to minor abrasion only. In general, surface preparation by etching is not recommended for composition floors within industry. Etching is mainly used for small areas when mechanical preparation methods are not applicable.
Etching is to be done with RENSA ETCHING etching liquid. Rinse the floor with water after etching and allow to dry.
All special jobs should be done before the application of the actual priming. E.g. cutting grooves at joints between steel and concrete. Cutting working and expansion joints open. Fitting up skirting and rounding of corners. Filling cavities and cervices, and possible levelling down the floor. Filling can be done with TEKNOPOX FILL or with stiff putty prepared by adding an adequate amount of dry sand (e.g. 0.1 - 0.6 mm) to undiluted varnish.
Application
Application conditions
The surface to be treated must be dry. During the application and drying period the temperature of the ambient air, the surface and the product shall be above +15°C and the relative air humidity below 80%. Additionally, the temperature of the surface to be treated and the product must be at least +3°C above the dew point of the ambient air.
Storage
The storage stability is shown on the label. Must be stored tightly closed and kept cool.
For TEKNOFLOOR Colour Sand Screed the recommended sand qualities are either sand dyed with epoxy or brown natural sand. The use of quartz sand is not recommended, since it will fade the Colour Sand Screed when exposed to moisture.
For each 9 liters of TEKNOFLOOR 400F epoxy varnish mixture (Comp. A/Comp. B = 2:1) mix 30-40 liters (43-58 kg) dyed or natural sand. For places which are exposed to specially heavy water or chemical stress should be used no more than 35 liters of sand to 9 liters varnish mixture. Practice has shown that the following ratios and grain sizes will give a tight layer with good application properties:
The screed is applied when the priming coat has dried for 6 - 24 hours, depending on the temperature.
Mix base and hardener of TEKNOFLOOR 400F and stir thoroughly by a slow-rotating drilling machine. Add the sand
mixture and stir by a slow-rotating drilling machine or power mixer until homogenous. If a free-fall concrete mixer is
used, TEKNOFLOOR 400F base and hardener can also be mixed and stirred in the machine before adding the sand.
When applying on LARGE INDUSTRIAL FLOORS pour the thoroughly stirred screed in a rollerbox applicator and
spread out to the required coat thickness. The sand and TEKNOFLOOR 400F epoxy varnish shall be at room
temperature (above +18°C) at application to ensure an even flow of screed from the rollerbox applicator. Smooth down the screed after 10 - 15 min. mechanically rubbing, whereupon achieving an uniform and tight screed surface.
On small surfaces pour the screed on the floor over the area that according to the spreading rate it should cover.
Spread out as a uniform coat by an adjustable trowel and comb lightly by a steel trowel with coarse pitch indentation to smooth away trowel marks. Finish by mechanical or manual levelling.
Top coat:
The screed is overcoated after 6 - 24 h depending on the temperature with TEKNOFLOOR 300F epoxy varnish
diluted 30 - 50% with TEKNOSOLV 9506 or TEKNOSOLV 9515. Two applications are recommended for floors
subjected to chemicals and damp strain.
| Solids | abt. 100 % by volume |
|---|---|
| Volatile organic compound (VOC) | abt. 0 g/l |
| Pot life | 15-30 min. (+23 °C) |
| Pot life, +23°C | +23 °C 1 - 2 h (poured out on the floor) 15 - 30 min (kept in the vessel) |
| Mixing ratio | 2:1 by volume (comp. A : comp. B) |
| Hardener | Comp. B: TEKNOFLOOR HARDENER 400H |
| Practical spreading rate | 4 mm coat: The practical spreading rate is 4 - 5 l ready mixture/m² depending on the roughness of the pretreated surface. |
| Drying time – fit for light traffic | 24 h |
| Drying time – fully cured | 7 d |
| Thinner | Not to be diluted. |
| Colours | Colours obtained with special colour sand blends and brown (natural sand). NOTE! Changes in the colour of TEKNOFLOOR 400F epoxy varnish may occur on objects exposed to sunlight. |
| Safety markings | See safety data sheet. |
| Approvals & certificates | CE marking,Smithers Rapra,VTT (Finland) |