Creom can be applied to all clean cementitious based concrete subfloors provided that they do not contain, or are surface treated with any accelerators, silicone or hardening agents which could prevent the penetration of Creom.Highly polished, dense powerfloated concrete, must be mechanically ground or lightly shotblasted prior to the application of Creom. Creom can be applied to sand and cement screeds provided that they are suitable for a surface moisture suppressant (i.e. porous) and do not contain, or are surface treated with any accelerators, silicone or hardening agents which could prevent the penetration of Creom. All smoothing compounds/adhesives suitable for impervious surfaces can be applied to Creom treated surfaces provided that the relevant manufacturer’s recommendations are followed.