The Original Plaster Paint® Black Wax has a Carnauba wax base, the hardest natural wax. This wax has an added black color tint to highlight & emphasize your piece’s fine features. Paste Wax is best used on wood surfaces such as furniture, cabinetry, floors & any wood decor. Paste wax gives a silky smooth, rich finish. All surfaces must be clean, dry, and free from dirt, wax, grease, glue, and other contaminants.