Golden Mediums offer artists infinite possibilities for altering and controlling the performance of acrylic colors. Use Mediums to control transparency, viscosity, and surface sheen. Golden Mediums can be thought of as colorless paints, as they are composed of polymers similar to the acrylic paints. They are the glue or binder that dries to form continuous, durable films. They are made of 100% acrylic polymers, which have proven to have excellent flexibility and chemical, water, and ultraviolet radiation resistance.