Eco-House - Heavy Damar Medium - 4oz - Eco-House Heavy Damar Medium is an (almost) traditional resin-oil painting medium containing damar resin and linseed standoil as binders. The main difference from the traditional 1:1:1 formula is the use of the mild Eco-House solvent system instead of turpentine and the addition of lead-free driers (cobalt-zirconium-calcium octoates), which reduce the drying time substantially. Eco-House Heavy Damar Medium has a rather heavy consistency resulting in a rich glaze finish, if used undiluted.