Arch preservative gets AWPA listing

(Atlanta, GA – January 29, 2009) On January 15, 2009, the Executive Committee of the American Wood Protection Association (AWPA) took final action on the listing of Copper Azole type C (CA-C) preservative for the AWPA Book of Standards. CA-C becomes the newest preservative to be listed; wood treated with CA-C to prescribed requirements now meets the International Building Code and other codes which refer to AWPA standards.

Developed by Arch Treatment Technologies, Inc., copper azole preservative couples dissolved copper with an azole co-biocide. Types A and B had been listed previously. Type C features two azoles, propiconazole and tebuconazole, which have a synergistic fungicidal effect that has been patented. Retention levels for CA-C are lower than most comparable preservatives – 0.06 pounds per cubic foot for above ground use and 0.15 pcf for ground contact.

A spokesman for Arch Treatment Technologies said that dissolved CA-C is one of two copper azole formulations used to protect wood sold as Wolmanized® Residential Outdoor® wood, used for decks, fences, and other residential and commercial applications.

AWPA is a consensus organization that establishes standards for the wood preserving industry. Its membership consists of preservative manufacturers, treaters, users of treated wood, scientists, academics, and other interested parties.

Headquartered in Smyrna, Ga., Arch Treatment Technologies, Inc. is a subsidiary of Arch Chemicals, Inc., Norwalk, Conn., a specialty chemicals company with approximately $1.4 billion in annual sales and leadership positions in water and wood treatment products and other antimicrobial chemicals. Arch serves markets in North America, South America, Europe, Asia and Africa. For more information, please visit the Web site: or call 770-801-6600.