H&C® Clear Liquid Hardner & Densifier is an amorphous colloidal silica solution designed to both harden and densify concrete.
interior/exterior polished concrete applications such as: warehouses, retail outlets, distribution centers, show rooms, airports, commercial applications
amorphous colloidal silica particles suspended in water
"Second-generation densifiers are lithium silicate-based densifiers with nano-sized technology and waterborne colloidal silica from nano-sized amorphous particles mechanically suspended in water... H&C Clear Liquid Hardener & Densifier is an amorphous colloidal silica solution."
available online (see product link)