TriArt Acrylic Mediums- Matte Polymer MediumMatte Polymer Medium is used for thinning and extending any viscosity of acrylic paint and decreasing gloss of acrylic colors. It can be used as a matte glazing medium. This translucent medium dries to a flexible matte film which has excellent resistance to water. When a transparent ground is needed Matte Polymer Medium can be used in the place of gesso; its tooth will also increase adhesion. Matte Polymer medium is extremely adhesive and can be used in collage and decoupage projects. It can be added to resoluble water based paints such as watercolor and gouache to increase water resistance and flexibility.