This rf encaustic 40ml iridescent copper paint cake is a wax based paint that is comprised of beeswax resin and pigment it may be melted on a heated palette then applied to a porous surface it may also be reheated in order to manipulate and mold the paint the main ingredient is beeswax which protects your art work from moisture or other environmental factors encaustic paint will not darken or yellow and does not require the use of solvents made by hand in the usa