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.

USE

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.

THICKNESS
Bonded
15-40mm

Unbonded
50mm+

Floating Domestic
65mm+

Floating Commercial
75mm+

Working time at 20°C
approx. 1 hour

Walkability at 20°C
approx. 3 hours

Consumption per m²/mm
0.31kg

Typical Mix Ratio (Cement:Sand)
1:5

COMPRESSIVE STRENGTH USING 0-8MM GRADED AGGREGATE
After 1 day 25.0 N/mm²
After 7 days 40.0 N/mm²
After 28 days 45.0 N/mm²

TENSILE BENDING STRENGTH (1:5)
After 1 day 4.0 N/mm²
After 7 days 4.5 N/mm²
After 28 days 5.5 N/mm²

BRE SCREED TEST
Normally after 6 hours

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