This C Roberson Impasto Medium will double oil paints for achieving impasto effects, when the paint is layered thick & textured. Made with stand oil, dammar resin, turpentine & bleached beeswax to a recipe created in the 19th century, it is crack-resistant & dries to a matt finish. Mixed one to one with your oil paint, C Roberson Impasto Medium retains the strength of colour while allowing you to build & define, showing brush or palette strokes. UK shipping by road only. Not available for International or Northern Ireland delivery.