Where to use Installation of ceramic tiles and mosaics over: Gypsum plaster Plasterboard Cement-based renders and cured reinforced concrete walls Tile backer boards Consumption guide: Bonding of ceramic tiles: Mosaic tiles (a 3-4 mm notched mosaic trowel) 1.5 kg/m² Tiles 15x15 over normal renders (a 5-6 mm notched trowel) 2.5 kg/m²