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Self-leveling Underlayments

Self-levelling underlayment is a necessary layer prior to installation of tiles, parquet and resilient coatings onto an old substrate.
For new building, when great flatness is required, e.g. for the installation of resilient floors or large-size tiles, self-levelling underlayment is indispensable to assure long service and comfort to the end-users. Typical thickness of application: 1-10 mm.

Floors – whether residential or industrial – usually consist of a multi-layers system comprising:

  1. Concrete slab
  2. Insulating system + heating system
  3. Screed (self-levelling or traditional)
  4. Self-levelling underlayment
  5. Tile adhesive
  6. Floor finish coat (parquet, soft covering, tiles, etc.)

Comparative table

Additive Types
Active matter (%)
Dry content (% by mass)
Lithium sulfate monohydrate (%)
Bulk density
pH (5% solution)
Particle size (% > 600 µm)
Particle size (% > 500 µm)
Particle size (% < 125 µm)
Particle size (% > 200 µm)
Viscosity (mPas)
Alkali as Na2O eq (% by mass)
Chloride content (% by mass)
Ash Content (ppm)
Water content (%)
Hydroxyl number (mg KOH/g)
CE Marking
Formaldehyde regulation
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