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NORDAS  WF 4

Flexible cement based thin-set adhesive for tile laying, quality acc. to EN 12004 class C 2 TE and EN 12002 class S 1.
Less chromate contents acc. to TRGS 613
Product description and use

Product description
NORDAS  WF 4 (grey) is a flexible cement based thin-set adhesive with high polymer modification to be used for thin-set laying tiles, mosaic and slabs indoor and outdoor, at walls and on floors. Itīs preferably use is at walls / on old tiles / with vitreous or porcelaine stoneware tiles / grounds with underfloor heater / at cement or gypsum based wall-boards.

NORDAS  WF 4 is especially suitable for laying:
vitreous or porcelaine stoneware tiles, ceramic slabs and formparts, non-dyeing natural stoneslabs, concrete slabs and big size tiles, new-on-old-tiles, on dragged and isolated gypsum based plaster, on isolated gypsum based wall boards or cement covered boards (tile backer boards), on heated grounds and walls, on reinforced decoupling mattings and other suitable grounds.

Available as white product NORDAS  WF 4 WEISS can be used for laying coverings with throughshining effect like glass mosaic or light-coloured natural stoneslabs with small slab thickness.

 
Recommended use (both products)
1. NORDAS  WF 4 is to be mixed with clear water in a clean bin until it has become a flexible smooth mortarpaste, after ripening mix once more.
Mixing ratio: 25 kg NORDAS  WF 4 : 7,5 litres water
Ripening time: approx. 3 minutes
Working time: approx. 3 - 4 hours, temperature depending
Laying time: < 30 minutes
Correction time: max. 10 minutes
Hardening: walkable / groutable after approx. 24 hours, full walkable after 3 days, full loadable after 14 - 28 days depending on the temperature and object
Storage time: closed bag, dry and frost free approx. 1 year.

2. Grounds must be clean and form resistant. Remove all loose plaster, oil coatings, colourspots and any other adhesive-reducing components from the surface, uneven patches shall be levelled out by plastering with NORDAS  WF 4 in advance.
The moisture content inside concrete floors or concrete plasters shall not be over 2%, concrete screed shall be 28 days old minimum. Gypsum plaster and gypsum containing components like wall-boards shall be isolated with a suitable covering. A good adhesive bridge will be reached when the moisture content inside the gypsum plaster is below 0,5%.

3. NORDAS  WF 4 adhesive shall be applied first smooth to get a contact layer, then comb from bottom to top by using a notch trowel. The tiles shall be pressed to the mortar with slight side force to get a full adhesive contact over the whole tileīs backside. Outdoor and floor coverings having bigger bumps on their backside must be buttered with NORDAS  WF 4 on their back in addition (Buttering/Floating-Combination), this is also valid for coverings with throughshining effect like glass mosaic or light-coloured natural stoneslabs with small slab thickness combined with the white NORDAS  WF 4 WEISS. Tile position can be corrected max. 10 minutes after setting.
Covering side length
up to 50 mm
50 - 108 mm
108 - 200 mm
over 200 mm
over 300 mm		 Recommended notch trowel
3 x 3 x 3 mm*
4 x 4 x 4 mm*
6 x 6 x 6 mm*
8 x 8 x 8 mm*
10 x 10 x 10 mm		 Approx. consupmtion**
1,5 - 2,0 kg / m2
2,0 - 2,3 kg / m2
2,3 - 2,6 kg / m2
2,6 - 3,1 kg / m2
3,1 - 3,8 kg / m2
*acc. to German standard DIN 18157 part 1
**depending on the ground and covering
4. Before tile setting works at wall-boards, the boards must be checked if correct and stable fixed to the ground. In dependence of the boardīs material it might be possible that the board needs a suitable isolation covering (e.g. paintable) in advance.
5.

Powder coatings on the back of vitreous tiles / porcelaine stoneware tiles must be removed! After application works "new-on-old-tile" or on reinforced decoupling mattings an extended waiting time is neccessary until the joints can be filled.
6. For the installation of temperature insulating wall-boards and the like the mortar shall be applied to the boardīs backside in lines or spots.
7. NORDAS  WF 4 shall not be used at air- and substratetemperatures below +5° Celsius and not over +25° celsius substrate- or watertemperature.
We guarantee for the quality of the material. Due to different site conditions we do not guarantee for the execution works by incorrect use.

N O R D C H E M I E
Chemische Fabrik
1/08