ARDEX A 38 Ultra Rapid Drying Screed Cement

A special cement for producing a rapid setting, hardening and drying floor screed. Can be used to produce a bonded screed, an unbonded floor screed laid onto a membrane, or a floating floor screed laid onto a compressive quilt/ insulating material.

Features and benefits:

• Rapid hardening – walkable in three hours.
• Receives ceramic and natural stone tiles directly after only four hours for bonded, unbonded and floating screeds.
• Install resilient, wood finishes and vinyl floor coverings after 48 hours.
• After only one day the compressive and tensile bending strengths of ARDEX A 38 exceeds the acceptable minimum attained by an ordinary cement screed after 28 days.
• Can be used with underfloor heating systems.
• Can be pumped for fast application.
• Walkable in 3 hours, and receives tiling from 4 hours.
• Compressive strength: After one day: 25.0 N/mm², After seven days: 40.0 N/mm², After 28 days: 45.0 N/mm².
• Tensile bending strength: After one day: 4.0 N/mm², After seven days: 4.5 N/mm², After 28 days: 5.5 N/mm².

Thickness:

ARDEX A 38 should be applied at the following thicknesses for normal cement/ sand screeds:

• Minimum 15 mm (design thickness up to 40 mm) for bonded screeds.
• Minimum 50 mm for unbonded screeds.
• Minimum 75 mm for floating screeds (65 mm in lightly loaded (domestic) locations).