BEHR PREMIUM Interior/Exterior Direct-To-Metal Eggshell Paint is a 100% acrylic eggshell finish that withstands tough elements on both interior and exterior surfaces. It provides excellent corrosion and flash rust resistance. Engineered for excellent adhesion to a variety of properly prepared ferrous and non-ferrous metal surfaces. This product is also a great finish for properly prepared and primed concrete, masonry, plaster, drywall, and wood surfaces. Color: Crater Gray.