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ARDEX A 38™ Rapid Set Screed

Unique ref.: ardex-a-38
Brand: ARDEX
Product family: Tile & Stone Installation System
Product group: Screeds/Mudbeds
Date of publishing: 2019-06-21
Edition number: 1
Type: Object (single object)
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ARDEX A 38™ Rapid Set Screed is a precision-engineered, polymer-modified, cement screed that sets, hardens and dries rapidly. Use for interior or exterior applications including swimming pools and other wet areas. ARDEX A 38 can be walked on 3 hours after application and can receive tile or stone after just 4 hours, even when used as an unbonded or floating screed. After only 1 day, the compressive strength and tensile strength of ARDEX A 38 exceed those that regular cement screeds achieve after 28 days.

Key Features
Rapid hardening – walkable in 3 hours
Suitable for bonded, unbonded or floating screeds
Install tile and natural stone after only 4 hours
Interior and exterior applications
Ideal for swimming pools and other wet areas
Install vinyl and wood floor coverings after just 48 hours
Exceeds the 28-day strength properties of ordinary screeds after just 1 day
Can be used with in-floor heating systems


Mixing Ratio: Approximately 250 lb. (113.4 kg) of screed sand and approximately 7.5 quarts (7.13 L) of water per 50 lb. (22.7 kg) bag

56 – 57 sq. ft. per bag at 3/4” (5 – 6 sq. m at 18 mm)
*Coverage will vary depending on the texture of the surface being smoothed

Compressive Strength (ASTM C109/mod – Air cure only): 6,300 psi (441.0 kg/sq. cm) at 28 days
Flexural Strength (ASTM C348): 775 psi (54.25 kg/sq. cm) at 28 days
Walkable: 3 hours
Install Tile / Waterproofing: 4 hours
VOC: 0
Packaging: 50 lb. (22.7 kg) bag
Storage: Store in a cool, dry area. Do not leave bags exposed to sun. Protect unused material by removing air from bag and sealing tightly.
Shelf Life: 1 year, if unopened
Warranty: ARDEX L.P. Standard Limited Warranty applies

Material main: Cementitious
Material secondary:
Designed in: Germany
Manufactured in: Germany

BIMobject Category: Flooring - Tiles
IFC classification: Floor
UNSPSC name: Concrete tiles or flagstones
UNSPSC code: 30131703
Uniclass 1.4 Code: L5331
Uniclass 1.4 Description: Floor tiles
Uniclass 2.0 Code: PR-56-11
Uniclass 2.0 Description: Carpets, Carpet Tiles, Underlays And Mats
Uniclass 2015 Code: Pr_20_29_88
Uniclass 2015 Description: Tile and fabric fasteners
CSI MasterFormat 2014 Code: 09 66 13
CSI MasterFormat 2014 Title: Portland Cement Terrazzo Flooring
OmniClass Number: 23-15 17 13 13
OmniClass Title: Tile Flooring
CSI UniFormat II Code: C3020
CSI UniFormat II Title: Floor Finishes
This product is available in:
  • Singapore
  • Thailand
  • Austria
  • Czech Republic
  • Denmark
  • France
  • Germany
  • Ireland
  • Italy
  • Poland
  • Russia
  • Spain
  • Switzerland
  • United Kingdom
Middle East
  • Turkey
North America
  • Anguilla
  • Antigua and Barbuda
  • Aruba
  • Barbados
  • Belize
  • Bermuda
  • British Virgin Islands
  • Canada
  • Caribbean Netherlands
  • Cayman Islands
  • Collectivity of Saint Martin
  • Costa Rica
  • Cuba
  • Curaçao
  • Dominica
  • Dominican Republic
  • El Salvador
  • Greenland
  • Grenada
  • Guadeloupe
  • Guatemala
  • Haiti
  • Honduras
  • Jamaica
  • Martinique
  • Mexico
  • Montserrat
  • Nicaragua
  • Panama
  • Puerto Rico
  • Saint Kitts and Nevis
  • Saint Lucia
  • Saint Pierre and Miquelon
  • Saint Vincent and the Grenadines
  • Saint-Barthélemy
  • Sint Maarten
  • The Bahamas
  • Trinidad and Tobago
  • Turks and Caicos Islands
  • U.S. Virgin Islands
  • United States
  • Australia
  • New Zealand