Wilko Quick Dry Primer & Undercoat Paint 750ml is suitable for preparing surfaces and is ideal for non-metallic surfaces, non-oily wood, building boards, plaster, cement, brick and stone. Dry in 2 hours it provides the perfect base for a finishing top coat. The contents of this can will cover approximately 9 square metres* which after 2 coats, is about the same width as 2 1/2 standard doors. (*Approximate coverage depends on the surface of your walls, see the back of can for more details). Wilko Quick Dry White Primer & Undercoat 750ml