Winsor & Newton Liquin Oleopasto A semi-matt, quick drying, non-yellowing impasto medium. It has a soft gel consistency with some brush drag, levels crisp brushmarks, extends tube colour and provides bulk. Allows rapid overpainting. This stiff, translucent gel is specifically for impasto and texture work. It dries to a crack-resistant and virtually non-yellowing film, it retains knife and brush strokes and will not level out.