Cu-Bor is a Copper/Boron wood preservative, used to treat the groundline area of standing wood structures such as utility poles. The highly effective active ingredients in Cu-Bor travel deep into the wood by diffusion (osmotic action). Cu-Bor's labeled uses include:
- Pressure Treating
Cu-Bor is also a furnish treatment in engineered wood products and a railroad tie treatment. Cu-Bor is available in bulk and ready-to-use packaging.
Cu-Bor Registration Label (Español)
Cu-Bor Safety Data Sheet
Cu-Bor 20 year test - Results
OSU 3 Year Cu-Bor Test Data
Oregon State University Cu-Bor Tests
Efficacy of Copper Borax Preservative
Performance of Borax-Copper Hydroxide
Retreatment of wood with Copper Hydroxide...
Supplemental Preservative Treatments
The principal cause of pole failure is decay, and the most common area for decay to occur is that portion of the pole from approximately 2 inches above groundline to approximately 18 inches below. The most accurate pole inspection method is to excavate this groundline area. For a marginal cost pole-owners can extend the service life of their poles by applying Cu-Bor externally and wrapping it with a moisture barrier before the excavation is closed.
″Wood, however, is a biological commodity that can undergo deterioration by insects, decay fungi, termites, and mechanical destruction. In many ways wood poles, can outlast materials constructed of synthetic materials like concrete, fiberglass, steel and aluminum if well maintained and cared for in a consistent and timely manner.″