Chalking or powder at the surface of a concrete slab is called dusting. It dusts because the wearing surface is weak, generally caused by the finishing operation performed over bleed water on the surface, or insufficient or no curing of the surface. These faults will result in a soft concrete surface, which will easily dust under traffic.
Xypex Quickset can provide a quick and easy solution to this common issue that faces Concrete Pre-mix companies, caused mainly by poor placement practices. Xypex Quickset is a water-soluble liquid blend of silicates, neutralizers and penetrating agents specially compounded to harden, dustproof and seal the surfaces of fresh or newly cured concrete floors.
Applied to the concrete surface, Xypex Quickset penetrates into the capillaries of the concrete substrate and chemically reacts with the free lime and calcium carbonate to form a hard, insoluble gel within the pores, thus closing off the small voids. Quickset provides superior hardening and a dustproof finish.