Velosit SL 504

Velosit SL 504

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VELOSIT SL 504 is a cementitious self leveling underlayment for concrete substrates. It creates a smooth surface for coatings and floor coverings.

Typical applications:

  • Interior and exterior use
  • Leveling of concrete slabs and floors
  • Repair of surface defects on concrete floors
  • Application thickness from 3 mm (1/8”) to 38 mm (1 ½“), up to 100 mm if extended with pea gravel


  • Minimal shrinkage/expansion under dry resp. wet curing conditions minimizing the risk of micro-cracking
  • Excellent flow with long slump life
  • Smooth surface profile
  • Fast air release with minimal requirement for agitation
  • Ready for covering with ceramic tiles after 4 hours, for moisture sensitive floor coverings after 16 hours.
  • 10-15 min. working time and 6 MPa (570 psi) compressive strength after 1 hour
  • Final strength of more than 30 MPa (4350 psi) after 28 days
  • Open to foot traffic after 1 hour
  • Very good adhesion to properly prepared concrete