White, opaque, matte, ground acrylic. Works well as a primer on most surfaces: including canvas, wood, paper, metal, chipboard, fabric, plastic, etc. Dries quickly. Works well for a variety of color products providing a smooth, non â€“ yellowing, chalky background. Gesso is water based, but permanent and flexible after drying. Will mix with pigments, or acrylic paints, to create a range of customized, colored grounds.