QUICK-DRYING PRIMER & UNDERCOAT - Rustins Quick Drying Primer and Undercoat is for use on interior and exterior work. Used as a primer, it is suitable for new and bare wood, MDF, plaster, brickwork and cement. It has high opacity and can be used as an undercoat on primed or painted surfaces. This paint may be overcoated with water or solvent based finishing paints. Available in White and Grey. Clean brushes in water