To give your acrylic painting a consistent matte finish, mix Mont Marte Acrylic Matte Medium with Mont Marte Acrylics. Not intended for use as a finishing varnish. Use water to clean up. FEATURES: Boosts paint flow and marginally lengthens acrylics' drying time, making paint easier to blend and perfect for thin glazes, washes, and watercolor effects without weakening the paint's adhesive or color strength.