Ardex A 38 Ultra Rapid Drying Cement 25kg

In stock | | 2-3 Working Days

  • Walkable in 3 hours
  • Receives ceramic and natural stone tiles directly after only 4 hours
  • Install resilient floorcoverings after 48 hours
  • Passes BRE In-Situ Crushing Resistance (ISCR) Testing after just 6 hours
  • After just one day, achieves the acceptable minimum compressive and tensile bending strengths attained by an ordinary cement screed after 28 days
  • For bonded, unbonded and floating screeds
  • Can be used with underfloor heating systems
  • Can be pumped for fast application


ARDEX A 38 has been specially formulated to produce ultra-rapid drying floor screeds for internal and external locations. With ‘RAPIDRY PLUS FORMULA’ Technology, an ARDEX A 38 screed can be walked on just 3 hours after application and ceramic and natural stone tiles can be installed after just 4 hours irrespective of thickness, making it ideal for fast track tiling projects. Resilient floorcoverings such as carpet, vinyl and wood can be installed after 48 hours irrespective of thickness. ARDEX A 38 achieves rapid strengthening and will pass a BRE Screed (ISCR) Test after just 6 hours. After a day, it will also exceed the acceptable minimum compressive and tensile bending strengths attained by ordinary cement screeds after 28 days.


ARDEX A 38 is used to produce bonded, unbonded and floating screeds for internal and external locations, including wet areas such as swimming pools. It can also be used for large repairs to existing cement/sand screeds. It is ideal for situations where early foot traffic and rapid hardening is required.



Floating Domestic

Floating Commercial

Working time at 20°C
approx. 1 hour

Walkability at 20°C
approx. 3 hours

Consumption per m²/mm

Typical Mix Ratio (Cement:Sand)

After 1 day 25.0 N/mm²
After 7 days 40.0 N/mm²
After 28 days 45.0 N/mm²

After 1 day 4.0 N/mm²
After 7 days 4.5 N/mm²
After 28 days 5.5 N/mm²

Normally after 6 hours

The Speedy Moisture Tester (Carbide Method) must be used to test moisture. Please consult ARDEX Technical Services for further advice.

More Information

MPN 18275
Brand Ardex
Area Internal | External
Coverage Approximately 3.2m2 at 25mm thick per 25kg unit
Material Other Materials
Size 25 kg
Type Screeds-Levellers
Width (mm) 0

Technical Info

Delivery Costs:

Delivery fees are calculated based on the weight of your order and your delivery location. You can use the delivery fee calculator in your basket or on the checkout page to find the exact cost.

Delivery Area:

We currently only deliver to UK Mainland and the Highlands. We do not deliver to the Islands, Ireland, or Northern Ireland.

Next Working Day Delivery (Subject to Stock Availability):

Orders placed before 12:00 pm (noon) will be delivered the next working day, excluding weekends and holidays. This service starts from £6.50 (including VAT) and the final cost is based on the weight of your order and your delivery location. You can check the exact cost in your shopping cart or on the checkout page by entering your postcode.

Economy Service (2-3 Working Days):

This service is only available for orders over 50kg. There is no additional charge for this service.

Sample Orders:

All sample orders are shipped for free via Royal Mail Tracked 48 or 24 service. Delivery typically takes 1-3 working days.

Delivery Methods:

Non-sample orders under 50kg will be dispatched via DPD or APC Overnight. Non-sample orders over 50kg (quarter, half, and full pallets) will be dispatched via Palletways or Kandrmason.


Simply place your order online and choose the Click & Collect option at checkout.
We'll email you once your order is ready for pickup at your chosen store.
Collection hours: Monday - Friday: 8:30 am to 4:30 pm

For more information, please visit our Delivery Information page.

- Please inspect your order for any damages upon delivery and notify us immediately if you find any.

- We will replace any items that are damaged during transit.

- We accept returns within 30 days of delivery.

- Please note that customers are responsible for the cost of returning items.

- We will process returns and refunds promptly once the items are received at our warehouse.

Returning Trims
Schluter Trime
Returning trims - 35% restocking fees applied.
Returnign trim with replacement - 15% restocking fees applied
Customers are responsible to arrange returning the item.
If we arrange a return colleciton, a £35 return item collection feed will be applied.

Mapei-Profilpas Trims
A 20% restocking fee will be applied. (Item must be in re-sellable condition)
The customer is responsible for returning the item.

For more information, please visit our Return & Exchange page.


Product Questions