Liquitex Gloss Medium and Varnish is an all purpose medium, formulated to be mixed into all acrylic paints and mediums. Mix into any acrylic paint to enhance the depth of color intensity, increase transparency, gloss, ease flow of paint and add flexibility and adhesion of paint film. It can also be used as a non-removable varnish to protect painting and establish gloss sheen surface. It is translucent when wet, but very transparent when dry. It dries to a non-tacky, hard, flexible surface that is resistant to retention of dirt and resists discoloring (non-yellowing, non-fogging) due to humidity, heat and ultraviolet light. depending upon substrate, it is breathable (allows moisture to pass through). It will not crack as surface expands and contracts during temperature and humidity changes. Applicable for any surface (flexible and inflexible) suitable for acrylic paint and mediums, such as canvas, paper, wood, Plexiglas, etc. Not for use over oil paint.