Medium Bed Premium fully supports heavy tiles and stone, reducing lippage problems and the need for leveling or pre-floating rough surfaces. Medium Bed Premium can be built up to 3/4 Inch (19mm) without shrinkage or extended set times. With significant non-sag properties and unparalleled impact resistance, both floor and wall installations can be completed with just one application. It may be used for either walls or floors and is perfect for both interior and exterior applications. Medium Bed Premium is a blend of Portland cement, sand and special dry latex additives that significantly improve bond strength and freeze-thaw stability performance characteristics.