Around since the late 1800s and formalized in 1911, CuNap gained popularity during WWII as a treatment for canvas tents and to treat wood since creosote supplies were limited. Early use for pole treatment in the Southeast was experimental with checkered results, largely attributed to improper product handling and emulsion issues. Extensive testing and improvements have led to copper naphthenate becoming a preservative of choice for longevity and environmental safety.
WHAT CuNap DOES: CuNap is highly effective against decay fungi and insects that destroy wood, such as termites and carpenter ants. In fact, CuNap has been standardized by the American Wood Preservation Association (AWPA [P36]). It is approved for agricultural use, railroad cross ties, building construction, freshwater applications and highway materials.
- Glue Laminated Members
- Lumber and Timbers
- Permanent Wood Foundations
- Piling and Poles
- Posts and Guardrails
- Structural Members
WHY choose DuraQ-CuNap:
- CuNap is highly effective against wood destroying insects such as termites and carpenter ants. This is especially important for the durability of railroad crossties and electric utility pole crossarms.
- CuNap is safe to use. It is non-conductive and non-corrosive to utility pole hardware. Exposure to CuNap does not burn or blister the skin. However, as with all treated wood products, CuNap products are not recommended for interior use.
- Wood treated with DuraQ-CuNap is considered non-hazardous waste in RCRA. Disposal is not a concern as it can be used for recycling or be incinerated for energy recovery.
- Poles treated by CuNap have a longer life span and are less brittle over time. They also come out of pressure treatment “cleaner” than many other products.
- CuNap is considered safe for the environment. Because of it’s low water solubility, CuNap treated wood results in minimal leaching. This makes it a popular choice for wooden bridges.
“When pressure treated it is used for: utility poles, cross arms, piling, fence posts, guardrail posts, glulam beams, railroad crossties/switch ties, bridge timbers. CuNap is used for bridge timbers, particularly over environmentally sensitive areas where preservative drippage is a concern.” — Mike H. Freeman, Independent Wood Scientist, “Copper Naphthenate and Copper Naphthenate Treated Wood — A Review and Update”Contact us for more information about availability in your area.