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Premixed fine grain mortar with normal setting and fast drying for bonded or floating screeds. Can be walked on after 8 hours, ceramic laying after 1 day, parquet laying after 5 days

it is used for:

  • Floating screed
  • Bonded screed
  • Unbonded screed
  • Floating screed with underfloor heating

Screeds manufactured with FONDOSEY are classified as CT-C30-F6-A 1fl according to standard UNI EN 13813. When processed at a temperature of +23 °C, it adds certain features to the screeds: rapid hardening without undergoing appreciable shrinkage; rapid drying of the mixing water and residual humidity; high initial and final mechanical strengths that are much higher than those obtained with traditional screeds. FONDOSEY screeds must be unbonded from pillars and perimeter walls using, for example, expanded polystyrene or cork. It is suitable for laying screeds over heating systems and as a support for the laying of parquet without the use of self-levelling. When FONDOSEY screeds are crossed by pipes that significantly reduce their thickness, it is essential to reinforce the areas concerned with a light hexagonal wire mesh to avoid dangerous weakening of the screed. Very large surfaces must be interrupted with suitable fractioning joints. Any existing joints on the substrate must always be placed on the FONDOSEY screed.

After 8 hours the screed can be walked on; after 24 hours it is possible to lay the ceramic; after 3 days natural stones; after 5 days if the residual humidity does not exceed 2% in weight it is possible to lay wooden floors.

The residual moisture of the FONDOSEY screed must be measured with a carbide hygrometer, which provides reliable moisture data by weight.

important warnings

  • Strictly follow the indicated water dosage.
  • Do not add aggregates or binders (lime, cement, plaster, etc.) to the product.
  • Do not add any additives (setting accelerators, thinners, etc.) to the product.
  • Separate the screed from the pillars and walls using a compressible material.
  • Cut the screed at the thresholds.
  • Do not apply FONDOSEY on substrates subject to rising damp or pushing dampness without interlaying a water vapour barrier.
  • Do not apply FONDOSEY where there is a beating sun, strong wind, temperatures below +5°C and above +35°C.
  • If ceramic tiles are to be laid on the product, please refer to UNI EN 11493, paragraph 5.2 in particular.
PackagePallet Kg
GreyBag kg 301800


The powder of a FONDOSEY bag (30 kg) must be mixed with 2 litres of clean water into a rotating mixer for at least 5 minutes. When the blend is well mixed, even and lumpfree, the product can be applied.


mixing ratio

2 litres of water with 30 kg of powder

mixing time

at least 5 minutes

consistency of the mix


pot life of mix

about 60 minutes


about 18 kg/m2 per cm of thickness

application temperature

from +5 °C to +35 °C

set to light foot traffic

after 8 hours

waiting time before application

of levelling compounds

from 1 to 5 days, depending on the type of flooring to be laid

final hardening

28 days


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