VELOSIT SC 241 is a cementitious light weight screed mix. It is mixed on site creating a rapid hardening overlayment with significantly lower weight than regular screeds. It is ready to receive flooring systems within 24 hours.
Typical applications:
Interior and exterior use
Bonded screeds
De-coupled screeds on insulation or membranes
Restoration of structures with limited static loads
Properties:
Minimal shrinkage/expansion under dry or wet curing conditions minimizing the risk of micro-cracking
Excellent workability
Fiber reinforced
Ready for covering with ceramic tiles after 6 hours, for moisture sensitive floor coverings after 24 hours.
45 min. working time and 1450 psi (10 MPa) compressive strength after 6 hours
Final strength of more than 5940 psi (41 MPa) after 28 days*
Open to foot traffic after 4 hours
Very good adhesion to properly prepared concrete
Excellent water resistance, no strength loss under water
High tensile strength allowing thin applications on de-coupled screed applications
Processing Mixing:
VELOSIT SC 241 requires 13-15% potable water, i.e. 0.7 – 0.8 gal. (2.6-3.0 l) water per 44 lb. (20 kg) bag. Fill the 13% mixing water (7.8 l per 3 bags) into a freefall mixer and add 3 bags of VELOSIT SC 241 and mix for 2 min. Check the consistency and add water to adjust the desired consistency (total water not to exceed 2.4 gal. Or 9.0 l). Small volumes can be hand-mixed in a suitable bucket. Add the calculated water amount and add the powder mix afterwards with a slow speed drill (300-600 rpm) into the water until a lump-free mix is achieved. Do not over water the product! The product is workable for 45 min. at 70°F
