Colloidal Silica densification using nano particles, size 7.  The fine, consistent purity of these nano particles instantly reacts not only to the surface of the substrate but deep within due to the minute particulate size.  Being colloidal silica, no excess mineral deposits are left on the surface during or post the polished concrete densification process.  Densification can be built upon itself with multiple applications.  Also, newly poured concrete dust proofing is highly recomended with Deloshs' Pre-Wet Procedure.