Winsor & Newton Professional Acrylic Matt Gel decreases the gloss of the colour. Its gel like consistency is thicker than Matt medium, matching the luxuriously thick and buttery consistency of the colour. Hence when mixed with colour the thickness of the colour is maintained, so the paint retains brush strokes and palette knife marks for excellent impasto effects. It dries completely clear to an even, matte finish. No loss of colour depth occurs / no colour shift from wet to dry when mixed with Winsor & Newton Professional Acrylics.