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Anhydrite screed specially formulated to offer a strong and durable thin topping to a solid interior substrate, such as in situ concrete, beam and block or precast concrete plank. It is designed to meet class A for impact resistance and due to its ultra-thin depth it can be dried quickly, allowing rapid return to service and application of finished floor coverings.

Gypsol TS-20 thin flowing screed is perfectly suited to flooring applications where height is extremely restricted and offers a lightweight cost effective alternative to smoothing compounds. The screed is designed to be laid to a minimum depth of 20 mm and can be used either bonded directly to a solid substrate prepared in accordance with BS 8204-7 or un-bonded on a polythene membrane.

Specification data
Product Reference

Gypsol TS-20 Thin Flowing Screed

Standard product features

Physical properties:

  • Appearance: Off white fluid mortar.
  • Density: Wet: 2200 kg/m³, dry: 2000 kg/m³.
  • Typical strength (after 28 days): C30-F6.
  • Required flow (to BS EN 13454-2): 230–270 mm.
  • Drying Time >1 mm per day (based on good drying conditions of 60%RH and 20ºC).
  • Fire rating: Class A1fl.

Application (minimum depth):

  • Unbonded: 20 mm.

Drying time:

  • Foot traffic: 24–48 hours.
  • Loading: 5–7 days.
  • Drying rate (20°C/60% RH): In excess of 1 mm/ day.
  • Force drying: Can be force dried after 7 days.

Application (minimum depth):

  • Bonded: 20 mm.
  • Unbonded: 20 mm.
  • Cover to conduits: 20 mm.

Gypsol TS 20 Screed is suitable for use on suitably engineered solid substrates.


  • Recycled content: Binder: 98%, mortar: up to 40%.
  • Carbon emissions: Binder: 10–20 kg/tonne, mortar: 20–40 kg/m³.
  • VOC: Virtually zero.
  • Recyclability: 100%.

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