RAPID HARDENING SELF LEVELING UNDERLAYMENT
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
Properties:
- 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