Gesso canvas primer is a professional grade 100 percent acrylic gesso formulated with the latest acrylic technology for adhesion and flexibility. Great for a wide variety of surfaces other than canvas. Features excellent tooth and absorbency to accept oil and acrylic colors, pastels, charcoal, pencil, and crayons. This package contains 4-fluid ounces of gesso canvas primer. Non-toxic and conforms to ASTM D4236.