XD Wax Medium is a 50-50 blend of damar gum and USP Beeswax, compared to our original wax medium which is a blend of 1 part damar to 6 parts USP beeswax. Damar gum in its raw form is a hardened tree sap that is transparent, hard, shiny and has a higher melting point than beeswax. XD wax medium has a thicker consistency when liquefied, is more flexible, shinier, harder and more translucent than regular wax medium. We recommend using XD wax medium as a paint extender, especially if you want to extend heavily for glossy, transparent glazes. Used as a top coat on smooth surfaces, it yields a hard, glossy finish with incredible transparency when applied thinly. XD is also a suitable medium to use as a protective coat over watercolor or gouache, thus eliminating the need for the art work to be put behind glass.