Gesso provides an absorbent surface ideal for paint. It is waterproof, lightfast, non-yellowing and flexible.  Demco gesso can be used with acrylic and oil painting, casein, gouache, pastels, charcoal and pencils. It is easy to apply with a brush, a paint roller or painting knife on dry and porous surfaces.   Supports: dry surfaces: canvas, cotton, cardboard, plaster, concrete… Cleaning: water and soap. Practical information: Shake before use. Do not apply with turpentine or oil. Can be diluted with water in small quantities to avoid cracking.