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Adrex K40 HB - 25KG

Adrex K40 HB - 25KG

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£20.64(Inc VAT)
£17.20(Ex VAT)
SKU: 12198Category: Flooring Brand: Ardex
Ardex K40 HB is a fibre reinforced, high build levelling and smoothing compound designed for applications from 3mm up to a maximum of 40mm. Most ... Read full description

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Ardex K40 HB is a fibre reinforced, high build levelling and smoothing compound designed for applications from 3mm up to a maximum of 40mm. Most floor coverings can be applied after 12 hours, and the compound can receive light foot traffic in as little as 2 hours making for light work.

Ardex K40 HB can be used to level and smooth new and existsting internal subfloors such as concrete ,stone, terazzo and ceramic tiles. Along with cement / sand screeds, anhydrite screeds and timber floors. 

Other applications of Ardex K40 HB include levelling uneven, damaged in situ concrete subfloors, and adjusting tolerances or camber problems between floors and slabs.

Ardex K40 Benefits

  • Fibre Reinforced for strength and flexibility
  • ARDEX K 40 HB hardens rapidly and can be walked on in as little as 2 hours, regardless of thickness, which means there’s minimal disruption on live sites, particularly those that are constantly in use by the customer or other trades. 
  • Fix tiles after 2 hours
  • Apply from 3mm to 40mmhe project.
  • Apply most floorcoverings after 12 hours
  • Can be used on heated screed

Ardex K40 HB Applications 

Compared to similar products, ARDEX K 40 HB offers nearly double the working time. This allows for easier trowel work, and you can make adjustments or smooth out joins. Some of the most popular use cases for Ardex K40 are: 

  • Ardex K40 is commonly used to level uneven floors or subfloor before installing flooring materials which creates a smooth and even finish for tiles, laminate vinyl or carpet. 
  • It is used to repair cracks, divots, and imperfections in existing concrete or masonry surfaces, providing a seamless and even appearance.
  • K40 HB is suitable for applications where resilient floor coverings like vinyl or linoleum are desired. It offers a stable and level surface for these materials
  • Applications of K40 up to 5mm can receive resilient floorcoverings, including timber, after 6 hours, and thicker applications up to 40mm after 48 hours. Ceramic floor tiles can be fixed 2 hours after application.
When applying Ardex K40 HB on Concrete, Gypsum & Timber Ardex P51 Primer should be used

Download the Ardex K40 technical datasheet [PDF]

1-2 working day delivery to UK mainland



Delivery and Return

Charges start from £6.90 inc vat on small, lightweight orders and £22.50 inc vat on heavier or difficult to transport items.

All small item orders with a value of £100.00 inc vat will be carriage paid.

All large item orders with a value of £200.00 inc vat will be carriage paid.

*small or large classification of items are determined by weight and dimension of product*

Please note that your order may need to be split into separate packages if over 30KG.

All of the above is based on UK Mainland deliveries, further charges may be incurred if the delivery address is outside of this.

We are also currently unable to deliver outside of the UK on our regular carrier so if you require delivery outside the UK please call or email the details to the office as we reserve the right to refuse service or refund orders based on this.

Guarantee next day delivery.

Some of our products have a note that states – if ordered before 1pm and being delivered to UK mainland on a next day basis.

Please note that given the current circumstances alot of carrier companies are struggling to keep up with demand and although we do book these deliveries as next day services, the carriers cannot always fulfil these and an extra day may be required.

A high percentage of our advertised goods are stock items but be aware that if you are taking very large quantities of stock that we may not be able to fill your order fully on first delivery. Please call the office to check to not be disappointed.

We are also an active trade counter and part of a larger network of companies so stock can be taken at any time but we will always aim to deliver your goods as soon as possible.

Also if ordered along side goods that we cannot guarantee next day delivery on, these will be delivered based on the schedule of the other item.

Signature required on delivery.

The carrier we currently use requires a signature for all deliveries as a proof of delivery. If you cannot guarantee someone will be home to receive this please leave delivery instructions for a safe place or neighbour to leave your goods with. Due to covid and new contactless deliveries, our carriers will not require a signature but will take down the recipients name as POD.

If no one is available to take the delivery, the courier will leave details at the address to rearrange delivery or may leave with a neighbour. Note we may need to make an additional handling charge for the return and re-delivery if a package is unable to be delivered multiple times due to no one being home to receive this. Due to covid our carriers are restricting the number of re-delivery attempts.

After three attempted deliveries our carrier will return the goods to ourselves and in this worst case situation, we may cancel the order and refund your money, excluding any additional charge for the return and re-deliveries.

Materials delivered from our own stock.

Normally 1 – 2 days (this can sometimes be longer if we are waiting for manufacturers’ stock to arrive into ours).

If the order is placed before 1:00pm and all of the items are in stock, then we will endeavour to dispatch your order same day for delivery the following day.

This still applies for deliveries out of our local area but please note that we use independent carriers so be aware that there may be external factors which we cannot control (e.g Far out postcodes or local traffic situations)

Materials delivered direct from the manufacturer.

There may be some occasions when it is more efficient or cost effective to have the materials shipped direct from our suppliers to the customer.

We will place the order immediately upon receipt of your order but this can sometimes take a few working days depending on the manufacturers production schedule or carrier used.

We will always endeavour to get the goods to the customer at the earliest possible date but if these are urgently required, please speak to us to check.

Please note that many manufacturers will offer a next day delivery service at an increased delivery cost and also a cut of time for this order to be placed (usually around 11am / 12pm)

Please call us on 08454 530 017 between 8am and 5pm Monday – Friday or email us on [email protected] for any delivery queries, or urgent requirements.

Please read our full terms and conditions with regard to full details on deliveries.

Ardex K40 HB is a rapid drying, high build, fibre-reinforced levelling and smoothing compound. It is fibre-reinforced for strength and flexibility and walkable in approximately 2 hours, regardless of thickness.

Yes both are applicable as long as the job is between the 3mm-40mm recommendation.

Ardex K40 HB will level and smooth, in a single application, most new and existing internal subfloors including concrete, cement/sand screeds, anhydrite screeds, stone, terrazzo and ceramic tiles, and suitable timber floors.

Yes, the surface of the subfloor must be clean, sound, and free from dust, plaster droppings, grease, polish, and any water softenable or loosely adhered materials. In all cases where traces of adhesive residues are present, these must be sound, hard, well adhered, and unaffected by water.

You will be able to fix tiles in as little as 2 hours, and install resilient and timber floorcoverings in 6 hours.

Yes, Ardex K40 HB can be used on concrete, cement/sand screeds, anhydrite screeds, stone, terrazzo and ceramic tiles, and suitable timber floors.

Ardex K40 HB must be stored in unopened packaging, clear of the ground in cool dry conditions and be protected from excessive draught. If stored correctly, as detailed above, the shelf life of this product is 12 months from the date shown on the packaging.