High Strength Self Leveling Overlayment

VELOSIT SL 503 is a cementitious self leveling overlayment for concrete floors. It creates an abrasion resistant smooth surface.

Typical applications:

  • Interior and exterior floors
  • Leveling of concrete slabs and floors as a finished surface
  • Repair of surface defects on concrete floors
  • Application thickness from 3 mm (1/8”) to 38 mm (1 ½“)


  • Minimal shrinkage/expansion under dry resp. wet curing conditions minimizing the risk of micro-cracking
  • Resistant to freeze/thaw cycles
  • Excellent flow with long slump life
  • Smooth surface profile
  • Fast air release with minimal requirement for agitation
  • Ready for foot traffic after 3 hours, for forklift traffic after 16 hours
  • 30 – 40 min. working time and 20 MPa (2900 psi) compressive strength after 4 hours
  • Final strength of more than 60 MPa (8700 psi) after 28 days
  • Wear resistance according to BCA: AR1
  • Excellent adhesion to properly prepared concrete
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