To tile with large format and natural stone tiles onto walls you must first make sure the walls are flat, clean, dry, and free of any dust, dirt, oil, grease, and any other loose material. Ensure that surfaces are suitable and prepared as advised. Then use the Dunlop Universal Bonding Agent where you will be applying the tile. For gypsum plaster and gypsum plasterboard, apply two coats of Dunlop Universal Bonding Agent, diluted with one part bonding agent, two parts water. Then allow primer to...