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Norcros Pro AF 2-Part Low Prep Self Smoothing Levelling Compound 20Kg – Pallet Deals and Bulk Buy

Norcros Adhesives

Norcros Pro AF Low Prep Self Smoothing Levelling Compound

An Ammonia and Latex free levelling compound suitable for use on most substrates without the need for priming.

It is particularly suitable for use over old adhesive residues and bitumen due to its low compressive strength. A bed depth of up to 30mm can be achieved with the addition of 3mm single-size granite chippings.

  • Ammonia free
  • Latex free
  • Suitable for most substrates without priming, including bitumen
  • Lay ceramic and porcelain tiles after 3 hours, lay floor coverings after 4 hours
  • Bed depth up to 30mm
  • Moisture tolerant
  • Suitable for use with underfloor heating
  • Conforms to CT-C14-F6

Norcros Pro 2-Part AF Low Prep Self Smoothing Levelling Compound extended information


Application thicknessApprox. Per 25kg unit * *
8mm3m2 (use of aggregate)
10mm2.3m2 (use of aggregate)


Floor surfaces must be suitably prepared: sound, dry (<75% RH) and free from contaminants that may prevent adhesion. Concrete and sand: cement screeds must be fully cured and any laitance or surface treatments must be removed. For substrates with readings up to 95% RH, where a damp proof membrane already exists, Norcros Pro Moisture Suppressant should be used. The temperature of the floor must be maintained above 5°C throughout the application and drying of the underlayment. Underfloor heating must be turned off, or maintained at not greater than 15oC** for at least 48 hours before, during and after application. The heating must not be switched up to operating temperature until at least 14 days after the leveller has been applied, when it should be raised at a rate of 5oC per day.

**This may be different for the adhesive. Check adhesive manufacturer’s recommendations for guidance.


Priming is not required for most subfloor surfaces with the exception of Anhydrite Screeds (further detail can be found under Preparation).


Pour the contents of the 5L container into a clean mixing bucket and gradually add all the powder whilst stirring with a power whisk fitted in an electric drill until a smooth, lump free consistency is achieved. The material should be mixed for a minimum of 3 minutes.

10kg of 3mm granite chippings can be added at this stage and mixed using a paddle mixer until fully dispersed into the mix.

Norcros Pro AF Low Prep Self Smoothing Levelling Compound product information

EN 13813 ClassificationCT-C14-F6
Working Time @ 20°C20 minutes
Walk on Hardness Time
@ 20°C
2 hours
Ready to Receive
Floor Coverings (at 3mm Thickness)
3 hours - Ceramic and
Porcelain Tiles

4 hours - Floor, Coverings
Compressive Strength
(EN13813: 2002)
28 day - 16 N/mm2
Flexural Strength
(EN13813: 2002)
28 day - 5.5 N/mm2
Per mm Thickness
Approx. 14m2
Application Thickness:
0mm to 12mm

Norcros Pro AF Low Prep Self Smoothing Levelling Compound preparation

Concrete / Power
Must be a minimum of 6 weeks old. This may be reduced to 48 hours if Norcros Permalayer anti-fracture membrane is used. Power Floated concrete - brush apply either Norcros Key Bond or a slurry bond coat consisting of 2 parts cement-based levelling powder or adhesive:
1 part Norcros Prime Bond & allow to dry.
Must be a minimum of 3 weeks old. This may be reduced to 48 hours if Norcros Permalayer anti-fracture membrane is used. If the screed is dusty or porous it is recommended that a coat of Norcros Prime Bond diluted 1:4 with water is applied. Allow to dry.
Anhydrite / Hemihydrite (Gypsum)
Dry in accordance with manufacturer's recommendations. Mechanically remove all traces of laitance. Prime using progressively stronger coats of Norcros Prime Bond - 1:4 with water: 1:3 with water & if still absorbent
1:2 with water. Allow to dry between coats
Underfloor heating must be turned off or maintained at not greater than 15°C for at least 48 hours before, during and after application. After levelling, the heating should not be switched on for 14 days after which the temperature should be raised at a rate of 5°C per day to operating temperature (Refer to Norcros How to sheet Commissioning of Underfloor / Undertile Heating Systems').
Undertile heating cables and mats should be encapsulated in a bed of Norcros Pro AF
Levelling Compound
AsphaltAn application thickness of at least 3mm (no greater than 6mm) required.
Adhesive ResiduesRemove any loosely adhered residues.
BitumenRemove any loosely adhered bitumen.
Timber FloorsScrew down and firmly fix any loose boards.
Pre-level the timber if required by overlaying with plywood or a suitable backer board


Pour the compound onto the floor and trowel out to the desired depth. The product is self smoothing, but the use of a spiked roller will improve performance. Ceramic and porcelain tiles can be laid as soon as the product supports weight, i.e. after approximately 3 hours. It should be noted that the pot life and set times of the product will be extended cold conditions and reduced at high temperatures.


Suitable for pumping with appropriate equipment.


Drying is dependent on the absorbency of the subfloor, ambient temperature and humidity. On absorbent surfaces, at a nominal 2mm thickness, the underlayment will be ready to receive most floor coverings within 12 hours.

Norcros Pro AF Low Prep Self Smoothing Levelling Compound STORAGE

Store in dry internal conditions away from direct sunlight between 5°C to 20°C. Norcros Pro AF Levelling Compound powder has a 12 month shelf life from date of manufacture.


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Buy The Pallet - Tile Adhesive and Floor Levellers Discount Store

5.0Out of 5 stars

Overall rating out of 17 Google reviews

Gary Dawson
3 days ago

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2 weeks ago

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a month ago

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2 months ago

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3 years ago

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3 years ago

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