Rustins Quick Dry Stain Blocker and Multi Surface Primer is a water based matt white primer designed to seal stains and prevent discolouration from bleeding through your top coat. Quick drying and low odour, it provides excellent adhesion to wood, plaster and previously painted surfaces, while also acting as a versatile primer for ceramic tiles, glass and melamine. Suitable for interior and exterior use, this multi surface primer is ideal for preparing a wide range of surfaces before painting and decorating.