Use Copper Naphthenate oil-borne preservative to waterproof and add longevity to wooden structures. Ideal for protecting utility poles, fence posts, lumber, or foundation piling. Semi-transparent color reveals natural wood grain. Non-corrosive formula wont damage hardware. Can be brushed on to surface or applied by other methods. Steam cleaning after treatment reduces surface oil residue for cleaner handling. Preservative is currently offered on all of companys timber products, which include, landscape lumber, and wooden salt/storage buildings.