Benfer Flexible Floor & Wall Tile Grout (5 Kg) is a water and frost resistant, cement-based floor and wall tile grout. Flexible and highly durable, it can be used for grouting natural stone, mosaics, glazed and fully vitrified tiles, in joints up to 20mm. ProFix Flexible Floor & Wall Tile Grout is ideal for grouting tiles fixed to timber floors or heated screeds i.e. in conjunction with underfloor heating systems