A copper naphthenate and hydrocarbon solvent wood preservative that may be brush applied for surface protection of most woods. Dip soaking or pressure impregnation of COPPER-GREEN will result in deeper penetration resulting in longer preservation of treatable species. The copper in COPPER-GREEN reacts with the cellulose of wood. As a result it is not easily lost from the wood by leaching. This formulation extends the service life of wood products.