Used in place of Portland Cement in cement/ sand screeds, Ardex A 35 produces a floor screed that can be walked on after 3 hours and is dry enough to receive tiling after 24 hours regardless of thickness. After 1 day the compressive and tensile strengths of an Ardex A 35 screed exceed the acceptable minimum attained by a conventional screed after 28 days. Size: 25kg Coverage: approx 2.3m 2 per 25kg bag for 30mm 1:4 screed