Product: Mont Marte Acrylic Matt Medium is designed to be mixed with Mont Marte Acrylics to impart a uniform matt finish to your acrylic painting. Ideal for creating thin glazes, washes and watercolour effects without reducing the adhesive qualities or colour strength. Mont Marte Acrylic Matt Medium increases the flow of paint and slightly increases the drying time of acrylics allowing paint to be more easily blended. Not designed to be used as a final varnish. Clean up with water.