ARDITEX NA^®

Compressive Strength
After 28 days approx. 16 N/mm²

Flexural Strength
After 28 days approx. 5.5 N/mm²

Indentation Resistance
24 Hours 15 N/mm²
7 days 25 N/mm²
(Typically floorcoverings range between 0.5 – 6 N/mm²)

NOTE: 1 N/mm² is the equivalent to approximately 100 Tonnes/m²

Approximate Application Coverage 
2mm = 7m²
3mm = 5m²
5mm = 3m²
8mm* with ARDEX Aggregate = 3m²
10mm* with ARDEX Aggregate = 2.3m²

*For application thicknesses 8mm and above, ARDEX Coarse Aggregate will improve coverage.

Suitable for underfloor heating?
Yes

Technical Datasheet

Health & Safety Datasheet (Liquid)

Health & Safety Datasheet (Powder)

Declaration of Performance

Environmental Product Declaration

EMICODE^® Certificate

Sustainability Datasheet

ARDITEX NA^® Brochure

Levelling in Tiling Installations

Q) What’s the best ARDEX Levelling Compound for my project?
A) The type of levelling and smoothing compound required depends on the project and the condition and intended final use of the subfloor, for example, loads in service, use in domestic or commercial locations, abrasion resistance and cleaning regimes etc.

ARDEX manufacture a wide range of latex and water-based smoothing and levelling compounds ideal for all projects. Our range includes products suitable for internal and external use, quick-drying products which allow the floor to be walked on in as little as 1 hour for same-day turnarounds, and deep fill products ideal for levelling floors up to 50mm.

For problem floors, especially on refurbishment projects, ARDITEX NA^® provides the ultimate solution, with excellent adhesion to almost all substrates without the need to prime, including flooring grade plywood, ceramic tiles, steel, and even over old bitumen adhesive residue.

If you’re working alone the extended working time of ARDEX K 39 means fresh mixes can be easily smoothed into existing pre-applied material up to 40 minutes after application, giving you more time to create the perfect floor with no trowel marks, ridges, joint marks or additional preparation the next day.

For more information on the full range of products please click here.

Q) Can I apply ARDEX Levelling Compounds over painted floors?
A) In general, “no”. A painted floor refers to anything on a floor that resembles paint and can include a variety of finishes ranging from acrylic or chlorinated rubber paints, which are generally used in domestic properties, to epoxy-based coatings more common in industrial locations.

Before applying an ARDEX Levelling Compound we recommend the removal of the “painted finish” to reveal a sound substrate without barriers to adhesion. This is because even though the ARDEX product may adhere to the “paint”, the bond of the “paint” to the substrate may not be strong enough and could lead to a failure in the floor.

In situations where a contractor deems the “painted finish” sound and wishes to apply ARDEX products directly to the “painted finish”, a trial area is always recommended and the contractor is accepting all responsibility that the bond of the “painted finish” is sufficient for the end-use.

Q) Does ARDITEX NA^® require priming?
A) ARDITEX NA^® can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. On absorbent surfaces, such as cement and sand screeds, it may be necessary to damp down the surface with water before applying ARDITEX NA^®, to help reduce suction and pinholes.

Prior to the application of ARDITEX NA^®, all calcium sulphate-based materials require priming. For more information please refer to our datasheets and guidance notes on the DOWNLOADS tab.

Q) Can ARDITEX NA^® be applied over bitumen adhesive residues?
A) Yes, ARDITEX NA^® can be applied between 3mm-30mm, providing any remaining adhesive residues have been checked to ensure they are not water-softenable and that they are hard, sound and have enough cohesive strength to receive the levelling compound.

Q) Can ARDITEX NA^® be applied over old ceramic tiles?
A) Yes, ARDITEX NA^® can be applied directly to ceramic tiles and terrazzo flooring after the surface has been degreased using a suitable degreaser.

Q) Is ARDITEX NA^® moisture tolerant? Can ARDITEX NA^® be applied below a Damp Proof Membrane?
A) Yes, ARDITEX NA^® is moisture tolerant and can be applied directly to damp subfloors providing they are free of surface water. When used below an ARDEX Damp Proof Membrane, ARDITEX NA^® will act as a pre-smoothing layer to ensure greater coverage and uniform application of the DPM.

Q) Can I apply ARDITEX NA^® direct to steel?
A) Yes, the steel should be mechanically prepared by abrasive techniques or shot blasting to expose a sound, clean, rigid and shiny surface prior to applying ARDITEX NA^® from 3-6mm.

Q) I’m refurbishing an older domestic property with no structural DPM. I’ve removed the old floorcovering – parquet flooring, to be replaced with LVT – but a thin black bitumen adhesive residue remains, what should I do?
A) Any remaining adhesive residues must be checked to ensure they are not water-softenable and that they are hard, sound and have enough cohesive strength to receive a levelling compound.

Where moisture-sensitive floorcoverings are to be installed the floor must be dry with less than 75% Relative Humidity (RH) when tested in accordance with BS 8203.

It’s common for older properties built before the 1970s to not contain a structural damp proof membrane or to exhibit moisture readings up to 98% RH.
In this instance, a pre-smoothing layer of ARDITEX NA^® followed by a suitable surface damp proof membrane such as ARDEX DPM 1 C is recommended.

ARDITEX NA^® can then be applied directly to the ARDEX DPM, up to 48 hours after application, to provide a surface ready to receive the floorcovering.

Q) I’m refurbishing a 1960s house with Marley Thermoplastic tiles on the floor, what should I do?
A) In domestic locations, ARDITEX NA^® can be applied directly as a nominal 2mm smoothing layer onto clean, suitably prepared, well-adhered and sound, homogeneous, thermoplastic and vinyl flooring which is a minimum of 2mm thick.

For more information please refer to the ARDITEX NA^® Datasheet on the DOWNLOADS tab.

Q) I’ve removed some old ceramic tiles and the floor is covered in old tile adhesive, what should I do?
A) Ensure any old adhesive is sound and that the floor is free from dust prior to applying ARDITEX NA^® direct.