
Ardex K15 HB High Build Rapid Drying Levelling Compound 25kg
Ardex K15 HB High Build Rapid Drying Levelling Compound 25kg
- Apply from 5mm to 35mm in one operation
- Rapid hardening - walkable in approximately 2 hours, even with thick applications
- Rapid drying - dry within 24 hours, even with thick applications
- Ceramic floor tiles can be fixed after 4 hours
Can be hand mixed or pump applied - Strong - high compressive strength
- Suitable for floors with underfloor heating
Non-Stock 5-7 Working Days
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| Type | Screeds-Levellers |
|---|---|
| Brand | Ardex |
| Area | Internal |
| Coverage | Approximately 2.7m2 at 5mm thick per 25kg bag |
| Material | Other Materials |
| Size | 25 kg |
ARDEX K 15 HB is an advanced and versatile high build levelling compound designed for applications from 5mm up to a maximum of 35mm. It is virtually tension free and is designed to rapidly level uneven, hard subfloors. Used in conjunction with either ARDEX P 82, ARDEX P 51 or ARDEX P 4 primers, ARDEX K 15 HB can be applied to old subfloors, e.g. concrete and other hard and rigid bases. ARDEX K 15 HB is a grey powder consisting of special cements, graded aggregates and high quality synthetic resins. When mixed with water, a fluid, pumpable mortar is produced which can be applied to the required thickness in one operation.
For thicknesses greater than 20mm it is possible to incorporate ARDEX Coarse Aggregate in the mixed mortar, thus giving significant cost savings for greater application thicknesses. When applied at 20°C ARDEX K 15 HB can normally be walked on after approximately 2 hours. The applied product dries and hardens rapidly so that even thick applications are ready to receive resilient floor finishes such as PVC within 24 hours. Ceramic floor tiles can be installed on top of ARDEX K 15 HB as soon as the surface of the ARDEX K 15 HB has attained sufficient strength and hardness, typically 4 hours after application at 20°C.
- Apply from 5mm to 35mm in one application
- Rapid hardening – walkable in approximately 2 hours, even with thick applications
- Floorcoverings can be applied after 24 hours, regardless of thickness
- Ceramic floor tiles can be fixed after 4 hours
- Pumpable
- Strong, high compressive strength
Working time at 20°C
approx. 30 minutes
Flow life at 20°C
approx. 15 minutes
Initial Set (Vicat)
approx. 30 minutes
Final Set (Vicat)
approx. 2 hours
UK Mainland & Scottish Highlands only
We do not deliver to Islands, Ireland or Northern Ireland
How is shipping calculated?
Shipping is based on your order weight and delivery location. Add items to your cart and enter your postcode to see the exact cost before checkout.
Some products supplied directly from our manufacturers (non-stocked brands) carry a separate delivery charge — this is shown clearly at checkout.
Free delivery on orders £450+ inc VAT
Tiles & tiling materials only · Free samples always ship free
Next working day delivery
Order before 12:00 pm · From £6.50 + VAT · APC Overnight or DPD · Under 50 kg
Not available weekends or bank holidays
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AB · IV · KW · PA — please allow additional working days for these regions
Pallet delivery — orders over 50 kg
Semi, half or full pallet · Palletways or K & R Mason · Next working day
Kerbside delivery only — driver cannot bring goods onto the property
Supplier direct delivery (non-stocked products)
Some brands are shipped directly from the manufacturer and carry a separate delivery charge, shown at checkout.
Genesis (trims) — £19 + VAT · 1–3 days · cut-off 11:00 am
Marmox (mosaics, shower trays) — £15 + VAT · 1–3 days
Marmox (oversized backing boards) — £65 + VAT · 1–3 days
Schluter (trims) — £20 + VAT · 1–3 days
Bihui (trims) — £15 + VAT · 1–3 days
Free sample delivery
No minimum spend · Up to 4 free samples · Next working day
Free Click & Collect
Select Click & Collect at checkout to pick up your order from our Croydon warehouse. We'll send an email confirmation once it's ready — please wait for this before visiting.
Bring your order confirmation email or order number when collecting.
If someone is collecting on your behalf, they must have the order number and the name on the order.
Mon – Fri, 8:30 am – 4:30 pm. Closed weekends & bank holidays.
Tile Experience, 108 Beddington Lane, Croydon, London, CR0 4YY
Order tracking
Email or SMS sent by the carrier once your order is dispatched
30-day return window
Returns accepted within 30 days of delivery. You also have a statutory 14-day cancellation right from the date of receipt.
Items must be unused & in original packaging
Returned goods must be uninstalled, unaltered and in the same condition as received.
Installed or cut items cannot be returned
Once tiles or materials have been cut, altered or installed, no return or refund is possible under any circumstances.
How to start a return
Contact us first at info@tileexperience.co.uk or call 0208 689 4187. Send the item back with your name and order number. Return shipping is the customer's responsibility.
Refund to original payment method
Processed within 3–5 working days of us receiving and approving your return.
Original delivery charges are not refunded. If no refund after 15 business days, contact us.
Damaged or incorrect items
Report within 48 hours of receipt. Email info@tileexperience.co.uk with your order number and photos of the damage. Confirmed replacements are sent next working day at no charge.
Non-stocked brands — restocking fee may apply
Returns for Genesis, Marmox and Bihui carry up to a 20% restocking fee. Schluter trims: 35% standard return, 15% if returning with a replacement order.
Cancellations
Cancel before dispatch for a full refund including delivery. Cancel after dispatch by rejecting the delivery — refund for goods only, not the delivery charge.

