QNAP™ 5W, 5% copper as metal (45% by Volume) US EPA # 64405-15. In addition to our lineup of oil based, ground contact Copper Naphthenate solutions, Poles, Inc. offers water based concentrate of Copper Naphthenate. QNAP 5W is available in 5 gallon jugs for use in applications that require a water based solution.Click here to view QNAP 5W SDS and EPA Label.While Q NAP 5W is registered as a ground contact wood preservative, it will not yield the same superior performance that our oil based preservative does. Using water as a diluent, instead of oil, does have some advantages. Please contact Randy Gross at 719-685-0444 with questions about the pros and cons of any of our Copper Naphthenate solutions. QNAP 5W is widely used as a wood roof treatment because of its superior qualities at preventing moss growth. Click here to read roof treatment pdf.5W can be used to treat wood such as; posts, poles, landscape timbers, fences, siding, cedar roofs, wood shingles, bridges, docks, peers, boats, piling and government boxes. QNap 5W does meet AWPA standard P 36 for the U1 and T1 categories. Some government wood box manufactures prefer the use of water based QNap5W.