Rustins quick dry primer and undercoat white rustins whpu1000 this 1l tin of quick dry primer and undercoat from rustins can be used as a primer on new and bare wood mdf plaster brickwork and cement used as an undercoat on primed or painted surfaces and may be overcoated with water or solvent based finishing paints rustins whpu1000 quick dry primer amp undercoat white 1 litre