ARDEX A 38 MIX Pre-Blended Rapid Drying Screed

A special cement for producing a rapid setting, hardening and drying floor screed for internal or external use, including swimming pools, allowing ceramic tiles or stone to be fixed after only four hours, even on unbonded and floating screeds. It 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.
• 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:

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 40 mm for unbonded screeds.
• Minimum 75 mm for floating screeds (65 mm in lightly loaded (domestic) locations).
• When used for screed repair, it can be applied to the full thickness of the existing cement/ sand screed.