Sopro DSF® 523 Tanking Membrane

Sopro DSF® 523 Tanking Membrane is a flexible, one-component, cementitious sealing slurry used to produce crack-bridging waterproof membranes (for composite systems comprising membrane and tile finish). Low-chromate to Regulation (EC) No 1907/2006, Annex XVII. With national test certificates (abP) to ZDB (Federation of the German Construction Industry) data sheet on waterproof membranes: “Guidance on indoor and outdoor installation of composite liquid waterproofing systems with tile finish; August 2012”, for Moisture Exposure Classes A and B with high exposure (regulated applications) and for Moisture Exposure Classes A0 and B0 with moderate exposure (non-regulated applications).

Suitable mineral substrates, including concrete, lightweight concrete, aerated concrete, cement and lime/cement render, gypsum plasterboard and gypsum fibreboard, renders made from masonry cement, plane, flush-jointed masonry (no composite masonry), cement screeds, calcium sulphate-based (anhydrite and self-levelling anhydrite) screeds, board subfloors, existing ceramic coverings.Sopro DSF® 523 Tanking Membrane is a flexible one-component, cementitious sealing slurry used to produce flexible, crack-bridging waterproof coatings.

This waterproof membrane can be used on balconies, patios, in showers, washrooms, toilets and swimming pools, applied prior to tiling (as part of a composite system with membrane and tile finish). For refurbishment of solid, strong existing tile coverings on balconies and patios. For internal coating of process water tanks with max. 4m water depth. Provides flexible, crack-bridging waterproof barrier for protection/preservation of structures and building elements.

Pre-wet cementitious substrates so as to ensure that they are slightly damp prior to application of Sopro DSF® 523. Single pre-wetting generally suffices for new, unsoiled cementitious substrates.

Related Downloads

icon-pdf  TDS Sopro DSF® 523 Tanking Membrane

icon-pdf  SMET Professional Tiling Systems Brochure

NBSplus NBS Specification Clause

BIM BIM Objects

Featured Benefits of Sopro DSF® 523 Tanking Membrane

• For indoor and outdoor use
• For walls and floors
• Vapour-permeable
• For balconies and patios, for damp and wet spaces
• Ideal for waterproofing fountains and spring catchments
• For roller, spatula, brush and spray application
• With national test certificates (abP)
• Low-chromate to Regulation 1907/2006/EC, Annex XVII

Technical Details for Sopro DSF® 523 Tanking Membrane

Coat ThicknessCoat Thickness/Coverage Dry coat thickness to national test certificate (abP) for Exposure Classes A and B: min. 2 coats = 2 × 1.0 mm (2 × 1.3 mm wet coat thickness); max. dry coat thickness: 4 mm.

Water tanks with water depths < 4 m: min. 2.5 mm dry coat thickness.

Coverage approx. 1.4 kg powder/m² per mm dry coat thickness.

Mixing ratio
  • Brush application: 5.8 – 6.2 ltr water: 20 kg Sopro DSF® 523
  • Trowel application: 5.2 – 5.6 ltr water: 20 kg Sopro DSF® 523
  • Spray application: 7.4 – 8.0 ltr water: 20 kg Sopro DSF® 523
  • Brush application: 2.9 – 3.1 ltr water: 10 kg Sopro DSF® 523
  • Trowel application: 2.6 – 2.8 ltr water: 10 kg Sopro DSF® 523
  • Spray application: 3.7 – 4.0 ltr water: 10 kg Sopro DSF® 523
Maturing Time3 – 5 minutes
Pot Life/Working LifeApprox. 2 hours; stiffened mortar shall not be retempered by addition of water or fresh mortar to restore workability
WalkableAfter 5 – 6 hours
LoadableAfter approx. 7 days
Specified TimesApply for normal temperature range of +23 °C and 50 % relative humidity; higher temperatures shorten and lower temperatures lengthen these times
Application TemperatureBetween +5 °C and +25 °C
 Drying TimeApprox. 4 hours per coat.
Shelf LifeApprox. 24 months, subject to storage on a pallet in dry conditions in original unopened containers
Tools and equipmentFinishing trowel, notched spatula, lambswool roller, thick/block brush, electrical screw pump Clean tools with water while the material is still fresh; mechanically only when set

Available in 20kg and 10kg bags.