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Preserve® is treated with ACQ®, a new generation copper plus quat preservative system that provides long-term protection from rot, decay and termites for a wide variety of residential, commercial and industrial building applications..

Product Features

  • Protected with ACQ, a new generation wood preservative
  • Does not contain arsenic or chromium
  • Provides long term protection from rot, decay and termite attack
  • For use in above ground, ground contact and fresh water immersion applications
  • Can be used in residential, commercial and industrial applications
  • Offers a wider selection of timber species
  • Easily painted or stained
  • Features a lifetime limited warranty
  • ACQ treated wood scraps and cut offs should be disposed of in a non-hazardous material lined landfill in accordance with local, state and federal regulations.
  • Preserve® is also available with built-in water repellent (Preserve Plus®)

Painting and Staining or Natural Weathering

Preserve® can be painted or stained to match any outdoor color scheme. High quality oil and latex-based paints and stains are recommended. Water repellent coatings can be applied to improve the weathering performance. Left uncoated or with clear water repellent coatings, Preserve® will initially weather to a natural brown color, eventually turning gray following long-term exposure to the sun.

It is important to ensure that the wood is dry and free from surface deposits prior to applying any coating.

Nails, Fasteners and Fitting

Hot-dipped galvanized or stainless steel fasteners and fittings are acceptable for use with ACQ treated wood. Direct contact of Preserve® treated wood with aluminum fasteners and fittings is not recommended.

Click Here for the Preserve® Fastener Information Sheet.

Preserve® Treated Lumber and Plywood Specifications, Approvals, Registrations and Awards

  • NER 643
  • Standardized by the American Wood-Preservers' Association (AWPA C1, AWPA C2, AWPA C4, AWPA C5, AWPA C9, AWPA C15, AWPA C17, AWPA C22, AWPA P5)
  • Preservative components registered with the United States Environmental Protection Agency
  • Australian Standard AS-1604 1997
  • AQIS - Australian Quarantine Service
  • JWPA Japanese Standards
  • CSA 0.80 Canadian Standard Association
  • NWPC - Nordic Wood Preservation Council
  • Approved in Germany, Holland, Denmark, Sweden and Spain
  • Winner of the US EPA Presidential Green Chemistry Award

Preserve® Recommended Retentions for Various Applications

Application - Retention (lbs/CuFt) - Uses:

  • Above Ground - 0.25 - Decking, fence boards, hand rails, deck supports
  • Ground Contact Fresh Water - 0.40 - Fence posts, landscaping, piers, docks, etc.

Decay & Termite Protection

Wood used in outdoor environments and in high moisture conditions, is susceptible to attack from decay fungi and termites that can cause strength reduction and eventual failure of wooden structures. Preserve® pressure treated wood products are ideal for use in a wide range of applications where protection from biological degradation is required.

Safety & Handling

Preserve® pressure-treated products do not contain any California Prop. 65 chemicals or EPA-listed hazardous chemicals and are easy to work with, requiring no special precautions other than routine wood working safety procedures. When working with or machining Preserve® pressure-treated wood, the following safety precautions should be followed:

  • Wear a dust mask and goggles when cutting or handling treated or untreated wood.
  • Wear gloves when working with treated or untreated wood.
  • After working with wood, wash exposed areas thoroughly.
  • Do not burn pressure-treated wood.
  • Wash work clothes separately from other household clothing before reuse.
  • Pressure-treated wood should not be used where it may come into direct or indirect contact with drinking water, except for uses involving incidental contact such as fresh water docks and bridges.
  • Do not use pressure-treated wood in circumstances where the preservative may become a component of food, animal feed, or beehives.
  • Do not use pressure-treated wood for mulch.
  • ACQ treated wood scraps and cut offs should be disposed of in a non-hazardous material lined landfill in accordance with local, state and federal regulations.


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