Non Absorbent Acrylic Primer from Michael Harding is a revolutionary medium for painters. It creates a strong, flexible working surface on linen, wood, MDF, and over standard primed canvases. Formulated as a buffer to keep the paint and the support separate from each other, while providing excellent adhesion. This is a 500ml container of Titanium Buff Non-Absorbent Acrylic Primer for use with both oil and acrylics. For a good neutral surface that is extremely lightfast.