The Mont Marte Premium Gesso 500ml is an essential, water-based universal primer engineered to expertly seal and prepare semi-porous surfaces like canvas, wood, and cardboard. It provides a bright white, opaque matte finish with a slight tooth that optimizes pigment adhesion and prevents paint from soaking directly into the substrate. Acid-free and highly flexible, this absorbent ground can be brushed smooth or applied heavily with a palette knife to create a stable, archivable base for acrylics, oils, and drawing mediums.