SO-Strong Color Tint 9-Pack Color Sampler Can be added to any Smooth-On liquid urethane rubber, urethane plastic or urethane foam (do not use with Smooth-On silicones). Colorants are highly concentrated, offer excellent dispersion and consistent color. A very small amount will color a proportionally large amount of liquid urethane material. The more you add in proportion to the volume of liquid urethane, the more dramatic the color effect. Color Tints: Black, Yellow, Brown, Purple, Green, Orange, Red and Blue. Color Pigments: White and Fleshtone Combine different colors on a palette to create a custom color before adding to material as directed above