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ATLAS ZW 330 Fast Setting Levelling Mortar 25Kg – Pallet Deals and Bulk Buy


ATLAS ZW 330 Fast Setting Levelling Mortar

Produced as a dry mix of high quality cement binder, quartz fillers and improvers.

  • tiling just after 5 hours
  • no shrinkage cracks (reinforced with polypropylene fibres)
  • high mechanical strength
  • unit size: 25Kg bags

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£569.60 +VAT

£569.60 +VAT

ATLAS ZW 330 Fast Setting Levelling Mortar extended information

Consumption: The average consumption is approx. 15 kg of dry mix/ 1 m2 / 10 mm of layer thickness.


Enables quick start of successive operations – in standard conditions tiling just after approx. 5 hours (for layers 5 mm thick).

Reduces the consumption of adhesive mortars, plasters, screeds and floors.

Plastic consistency – working parameters ensure easy application and filling gaps in the repaired surface.

High mechanical strength:

– compressive strength min. 20 MPa

– flexural strength min. 4,0 MPa.

Reinforced with polypropylene fibres which:

– reduce cracking resulting from shrinkage during the mortar setting,
– enable application of thicker mortar layers on vertical surfaces, with no slip effect,

– ensure uniform water distribution during drying.

No shrinkage cracks.

Wide range of layer thickness – from 3 up to 30 mm in a single operation – one may extend the layer thickness from 31 mm up to 60 mm after mixing the mortar with quartz sand (grain size up to 2 mm) in 1:4 weight ratio (quartz sand: dry mortar) – recommended when filling gaps and leveling horizontal surfaces.

ATLAS ZW 330 Use

Substrates repairs indoors and outdoors – enables filing gaps and cavities as well as leveling other substrate irregularities.

Execution of bonded screeds.

Types of repaired surfaces – cement and cement-lime plasters, concrete, aerated concrete, cement jointless floors, rough walls made of bricks and ceramic or silicate hollow blocks.

Type of finishing coats – ceramic cladding, finishing coats, thin- coat plasters/ renders, floor panels, etc.

ATLAS ZW 330 technical data

Bulk density (of dry mix)approx. 1.6 kg/dm3
Mixing ratio (water/dry mix)0.17÷0.22 l / 1 kg
4.25÷5.5 l / 25 kg
Contact coat10 kg of dry mix ZW330 + 1,0 l of water + 2,0 kg of f ATLAS ELASTIC EMULSION or ATLAS ADHER
Min./max. mortar thickness3 mm / 30 mm
For wider gaps (from 31 mm up
to 60 mm) quartz sand of grain size up to 2.0 mm can be added in 1:4 ratio
(quartz sand : dry mortar)
Max. aggregate size1.0 mm
Pot lifeapprox. 2 hours
Open timemin. 20 minutes
Fixing the tiles from the moment of applying the mortarafter 5 hours /5 mm of layer thickness

after 10 hours /10 mm of layer thickness

after 20 hours /20 mm of layer thickness

after 48 hours/layer thickness above 20 mm
Panels installationafter 48 hours
Full loadafter 3 days

ATLAS ZW 330 technical requirements

Reaction to fireA1
Water absorptionWC1
Water vapour permeability coefficientμ ≤ 30
Bonding0,3 N/mm2 - FP:B
Intended use:
EN 13813:2002 Cement-based screed for indoor use
Reaction to fire (for direct exposure)A1fl
Release of corrosive substancesCT
- Compressive strength
- Flexural strength


Substrate Preparation

Substrate preparation – for substrate repairs

The substrate should be dry and sound, i.e. it should be strong enough and free from layers, which would impair the mortar bonding, in particular dust, dirt, lime, oil, grease, wax, bituminous substances and paints residues. Remove loose pieces and weak substrate elements mechanically, e.g. hack them off. Just before the application of the main mortar layer, the substrate should be moistened with water up to the matt-wet state. If improvement of bonding to the substrate is required, one should apply the contact coat (description below).

Substrate preparation – for bonded screeds

The substrate should be free from layers, which would impair the mortar bonding, in particular dust, dirt, lime, oil, grease, wax, bituminous substances and paints residues, poor or loosening pieces of old screeds. Just before the application of the main mortar layer, the substrate should be moistened with water up to the matt-wet state and the contact coat applied (description below).

Contact coat preparation

The contact coat can be prepared with one of the following methods:
– with ATLAS ZW 330 modified with ATLAS ELASTIC EMULSION in ratio: 10 kg of ATLAS ZW 330 + 1 l of water + 2 kg of ATLAS ELASTIC EMULSION,

– with ATLAS ADHER mortar.
The contact coat has liquid consistency and can be applied with a brush. Rub it well into previously moistened substrate, then apply the main mortar layer with “wet on wet” method. When the contact coat dries, apply another one before the application of the main mortar layer

Mortar preparation

Pour the mortar from the bag into a clean container with the suitable amount of water (see Technical Data for ratio) and mix using a mixer with a drill until homogenous. The mortar is ready to use directly after mixing and should be used up within approx. 2 hours.

Mortar use – repair mass

Apply the mortar onto previously prepared and primed substrate with a trowel or a smooth steel float. The single mortar layer thickness should not exceed 30 mm. The layer thickness can be increased up to 60 mm after mixing the mortar with quartz sand (grain size up to 2 mm) in 1:4 weight ratio (quartz sand : dry mortar). After initial setting, the applied mortar layer can be floated with a felt or a polystyrene float or smoothed with a steel float.

When preparing the substrate for tiling, float the mortar rough.

Mortar use – screed

The screed should be separated from walls and other elements within the application area with ATLAS EXPANSION JOINT PROFILES. The size of application area should not exceed 36 m2 with sides length up to 6 m.

The expansions joints should also be executed at room thresholds and around load-bearing posts. The existing structural expansion joints should be transferred onto the screed layer.
Spread the mortar with a steel float.

Screed drying and maintenance

In order to ensure favourable conditions for mortar setting, depending on needs, sprinkle the freshly applied surface with water or cover it with foil. Proper maintenance leads to increase of strength of product but also extends the time of drying. The time of drying of screed depends on the layer thickness and ambient thermal and humidity conditions.

Finishing works

Follow the guidelines listed in the Technical Data section when fixing the tiles on the repair layer made of ATLAS ZW 330. Prime the surface with ATLAS UNI-GRUNT or ATLAS UNI-GRUNT ULTRA before tiling.





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