Modern Masters® Metallic Paint Primer is an ideal primer and foundation color for Modern Masters’ Metallic Paint Collection, Matte Metallics and Exterior Metallic Paints. It promotes adhesion on smooth surfaces, dries fast and is immediately sandable when dry. It also provides excellent stain-blocking power and tolerates pH levels up to 13. Use Cool Tone Primer under Silver and Pewter Metallic colors. For Gold and Copper Metallic colors, use Modern Masters Warm Tone Primer. Metallic Paint Primer is suitable for concrete, masonry, nonferrous metal, galvanized steel, plastic, wallboard, wood, plaster, stucco, and previously coated surfaces. It can be used for both interior and exterior applications.