Dulux Matt is a smooth emulsion paint for use on walls and ceilings which is ideal for a modern, flat finish. It has unique Chromalock technology for durable colour fastness. Surfaces should be clean (no dirt, grease or loose material) and dry. New, bare and absorbent surfaces should be sealed either with a flash coat of the product thinned by 10% with water or with a proprietary sealer such as Dulux Sealer for Plaster. Damage to the wall, holes and cracks should be repaired using appropriate filling product.