This water-based universal [rimer is superb for preparing surfaces for painting. It is a bright white opaque primer with an absorbent character. Mont Premium Marte Gesso may be used on canvas, cardboard and wood. Once dry, gesso may be painted on with acrylics and oils. Mont Marte Premium Gesso is acid free and provides an absorbent surface to paint on. Apply two thin coats of gesso for a smooth surface with Mont Marte Gesso Brushes. May also be applied with a palette knife for a more textured effect. Touch dry within 2 hours, longer for heavier application. Clean up with water.