A concrete densifier is a liquid chemical spread evenly across the floor that penetrates the top surface layer of concrete. Its purpose is to fill the porous holes formed from water evaporation during the curing process, similar to how water fills the pores of a sponge.
A densifier works by penetrating into the surface of the concrete and fusing the inert compounds and sand particles into a crystalline bond. By bonding these loose and weak materials more tightly together, the surface density and abrasion resistance of the concrete surface is greatly increased.
Chemical densifiers are used on polished as well as non-polished concrete to reduce dusting and to make the surface less permeable to liquid spills..