Palace Self-Level Levelling Compound - GreySelf Level Flooring Compound is a cement based, protein free, sub floor smoothing under layment, giving a consistently level screed from 2mm up to 12mm thick. When mixed with water it gives the ideal smooth finish properties needed for application over masonry based floor surfaces such as tamped or worn concrete and sand cement floor screeds. On non porous floors such as mastic asphalt, plywood and painted or sealed surfaces, the SELF LEVELLING