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| Compare the New Preservatives |
The new waterborne wood preservatives offer the consumer many choices. It is important that both consumers and industry professionals understand what treatments are available and how they stack up. Some of the preservatives such as ACQ, Copper Azole and Borates, although viewed as "new," have been in use for a decade or more, primarily overseas. Although lumber products used in consumer applications will no longer be treated with CCA, some uses of CCA are permitted, such as industrial, highway, marine, and some agricultural applications. To view a list of products that may continue to be treated with CCA, click here.
Comparing Alternative Wood Preservatives
| Preservative Types |
Manufacturer
Popular Brand Names |
History / Uses |
Alkaline Copper Quat (ACQ)
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Chemical Specialties, Inc.
Preserve®
Preserve® with water repellent
Osmose, Inc.
NatureWood®
NatureWood® with water repellant
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ACQ-treated wood was first introduced in the United States 10 years ago. It has been successfully
used in Europe, Japan, New Zealand, Asia, and Australia for the last 15 years.
Uses: ACQ is a fixed preservative approved for full exposure to above ground, ground contact, and freshwater applications.
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Copper Azole (CA)
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Arch Treatment Technologies, Inc.
Wolmanized®
Wolmanized® with water repellant
Thompsonized® Wood with water repellant
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Wood products treated with Copper Azole have been used effectively around the world since 1992.
Uses: Copper Azole is a fixed preservative approved for full exposure to above ground, ground contact, and freshwater applications.
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Sodium Borates (SBX)
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Arch Treatment Technologies, Inc.
SillBor®
Chemical Specialties, Inc.
TimberSaver® PT
Osmose, Inc.
Advance Guard®
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Wood products treated with Borates were initially established in New Zealand in 1950. Before being introduced into the United States more than 10 years ago, Borates were widely used in New Zealand, Europe, and Southeast
Asia.
Uses: Borates are a diffusible preservative approved only for above ground applications that are continuously protected from liquid water, such as sill plates and other enclosed structural framing.
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* This table represents several of the leading preservative types and popular brand names available to date.
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