Coverage: 1.1kg/m-square/mm of bed thickness Flexible adhesive for internal/external use, swimming pools etc., use with all types of tile including fully vitrified, porcelain & mosaics. Suitable for walls & floors. Available in grey. Built-in admix.ARDEX-FLEX 5001 is classified as C2 TE S1 (improved cementitious adhesive with additional characteristics, reduced slip & extended open time) in accordance with BS EN 12004.