Ideal for: Suitable for most tile types including ceramic, porcelain and some natural stone, and for both internal and external applications. Where to use: Bonding of tiles to cementitious and anhydrite screeds, heated screeds, cementitious render or lime-mortar render, plasterboard, pre-fabricated and cement-fibre board. Laying tiles on flexible substrates or substrates subject to vibration: marine plywood, old wooden floors etc.