Self Levelling Flooring compound, a cement-based, protein-free,sub-floor smoothing underlayment, giving a consistently level screed from a feather-edge up to 6mm thick. Self Leveling Flooring compound incorporates specially blended cements,graded sands and organic super-plasticisers, which with the addition of water, give the ideal properties for application to masonry based floor surfaces such as tamped or worn concrete and sand/cement floor screeds.