Old Masters Gel Stain is a highly pigmented, oil-based stain designed to achieve inense colors on interior and exterior wood, fiberglass, metal and composition surfaces. Its thick formula allows easy application and superior color control, necessary to achieve a rich and uniform color on most surfaces in a single application. Ideal for difficult to stain woods such as pine, poplar, maple, plywood and veneers, as well as nonporous surfaces including metal, composition (masonite), interior and exterior fiberflass doors and plastic moldings. Gel Stain comes in 21 factory-mixed colors and can also be intermized or tinted to achieve custom colors.