ARDITEX NA can be used with confidence over almost all subfloors without priming including ceramic tiles, bitumen and flooring grade plywood. On absorbent surfaces, such as cement and sand screeds, it may be necessary to damp down the surface with water before applying ARDITEX NA, to help reduce suction and pinholes.
Prior to the application of ARDITEX NA, all calcium sulphate-based materials require priming. For more information please refer to our guidance note.