Rustins Quick Dry Grey Primer and Undercoat 500ml is suitable for interior and exterior use. It can be used as a primer on new and bare wood, MDF, plaster, brickwork, and cement. Its high opacity also makes it suitable as an undercoat on primed or painted surfaces. This paint may be overcoated with water or solvent-based finishing paints. Clean brushes in water. Formulated with water-borne acrylic emulsion, pigments, and extenders for excellent opacity. Available in matt white and matt grey.