Trass cement-bound premixed dry mortar as pervious bedding mortar, as base layer and for laying concrete and natural stone tiles and paving units outdoors. Specially graded material produces a highly pervious mortar bed. This provides reliable protection against water-induced damage, e.g. efflorescence and microstructural failure through frost action. Sopro DM 610 is applied and covering material subsequently laid wet-on-wet using Sopro HSF 748 flexible bonding slurry with trass.

• For floors, indoors and outdoors
• Ready to receive covering: after approx. 3 days
• Test report: very high water permeability
• Compressive strength after 28 days: approx. 25 N/mm²
• Flexural tensile strength after 28 days: approx. 4 N/mm²
• Very good workability
• Pumpable
• For thick bed laying wet-on-wet in mortar bed, with min. 2 cm coat thickness when directly applied to substrate
• Low-chromate to Regulation (EC) No 1907/2006, Annex XVII