Economic Self Leveling Underlayment for Carpet, Vinyl and Laminate Floors

VELOSIT SL 525 is an economic cementitious self leveling C25 underlayment on concrete, gypsum, magnesia and asphalt substrates. VELOSIT SL 525 creates a smooth surface for coatings and floor coverings.

Typical applications:

  • Leveling of floors receiving thin flooring materials
  • Leveling of undulations prior to installation of wall-to-wall carpet, vinyl sheets, vinyl carpet and laminate floors
  • Application thickness from 1 mm (40 mils) to 12 mm (½“)
  • As a binder for terrazzo floors


  • Minimal shrinkage/expansion under dry resp. wet curing conditions minimizing the risk of micro-cracking
  • Excellent flow with good slump life
  • Extremely smooth surface profile
  • Easy to sand and/or polish after curing
  • Fast air release with minimal agitation requirement
  • Ready for covering with ceramic tiles after 5 hours and moisture sensitive floor coverings after 48 hours
  • 30 - 40 min. working time and 10 MPa (1450 psi) compressive strength after 5 hours
  • Final strength of more than 25 MPa (3652 psi) at 28 days
  • Open to foot traffic after 3 hours
  • Very good adhesion to properly prepared substrates
  • Excellent water resistance, no strength loss under water
  • Mid gray color


Here you can find detailed information about the selected VELOSIT product.

Technical Data Sheet Environmental Product Declaration - EPD Safety Data Sheet

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