Traditional Medium: Dries fast & waterproof for traditional acrylic techniques. Use with Atelier Interactive & other artists' acrylics. For preparation of painting surfaces.A flexible, water-based acrylic with a high grit content, designed to provide a stable surface on which to paint either for acrylic or oil painting.Use straight from the container, as no dilution is required.Clean up with mild soap & cool water. Water-Based & Non-Toxic.