"Multi-Flex" adhesive is stocked in bags of 20Kg and 10Kg. When using a 10mm notched trowel (see "Accessories and tools"). Multi-Flex will cover approximately 4Kg per sqm of heavy duty floor tiles on an even surface.The coverage for wall tiles is approximately 3Kg per sqm. All purpose flexible and waterproof floor tile adhesive (available in white and grey).This is a Polymer modified, cement based floor tile adhesive for use on waterproof plyboard and non-porous, impermeable surfaces, or where vitrified porcelain tiles are to be fixed.