Copper is both repellent and toxic to termites. The University of Hawaii has found Copper Naphthenate in wood at loadings of 1.5 lbs. per cubic foot is resistant to Formosan Termite attack and degradation. Tenino will successfully protect against termites only if minimum loadings and sufficient penetration are achieved. Tenino is best used to supplement pressure-treated preservative wood protection in aggressive hazard class environments envisioned in AWPA Use Category 4, 4B,4C.
Reveals Natural Wood Grain
The bright green color of wood freshly treated with copper naphthenate will become brown in outdoor exposure. Multiple studies demonstrate no excessive corrosion of hardware and fasteners due to contact with the preservative.
Copper Naphthenate has been used as a wood preservative for over one hundred years with many applications for use including; field boxes, benches, flats, fence posts, canvas, burlap, ropes, nets, greenhouses, utility poles, crossarms, and wooden structures in ground contact and above ground contact. The American Wood Protection Association's (AWPA) standardization process has confirmed oil-borne copper naphthenate's efficacy as a wood preservative. The USDA Forest Service Forest Products Laboratory has documented in field trials copper naphthenate's long-term protection performance.
Copper Care Wood Preservatives, Inc. formulates Tenino Copper Naphthenate with low VOC oils to comply with the South Coast Air Quality Management District's (SCAQMD) Rule 1113, and ICC 700 National Green Building Standard (NGBS) with less than 350 VOC grams per liter. Tenino is 100% domestically sourced from recycled copper and reclaimed by-products.