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Keraflex Maxi S1 Zero is a grey powder composed of cement and graded aggregates. It contains a high quantity of synthetic resins and special admixtures created according to a formula developed in MAPEIs Research & Development Laboratories. A easily workable and highly thixotropic mortar with the following features is obtained when mixed with water. It allows the installation of tiles from the top towards the bottom without using spacer pegs and presents perfect adherence to all materials normally used in building.