NatureWood® ACQ®



What is NatureWood® ACQ® ?

The NatureWood® ACQ® preservative is a waterborne, Alkaline Copper Quaternary preservative system developed to provide long-term protection to wood exposed in exterior applications. The ACQ NatureWood system is based on Copper combined with a quaternary ammonium compound and is applied to wood by pressure treatment. Copper and quaternary ammonium compounds are effective fungicides and termiticides. Together they provide protection against a broad spectrum of decay fungi, borer and termites.



Hazard Class



NatureWood ACQ is suitable from H1 to H5. For details on what the hazard classifications are please go to the Treatment Guide page.



Important Information - NatureWood® ACQ®


  • Do not burn preserved wood.
  • Wear dust mask & goggles when cutting or sanding wood.
  • Wear gloves when working with wood.
  •  Some preservative may migrate from the treated wood into soil/water or may dislodge from the treated wood surface upon contact with skin. Wash exposed skin areas thoroughly.
  • All sawdust and construction debris should be cleaned up and disposed of after construction.
  • Wash work clothes separately from other household clothing before re-use.
  • Preserved 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 preserved wood under circumstances where the preservative may become a component of food, animal feed or beehives.
  •  Do not use preserved wood as mulch.
  • Only preserved wood that is visibly clean and free of surface residue should be used.
  •  Do not use preserved wood in direct contact with aluminum.
  •  If the wood is to be used in an interior application and becomes wet during construction, it should be allowed to dry before being covered or enclosed.
  • Disposal Recommendations: Preserved wood may be disposed of in landfills or burned in commercial or industrial incinerators or boilers in accordance with federal, state and local regulations.
  • If you desire to apply a paint, stain, clear water repellent or other finish to your preservative treated wood, we recommend following the manufacturer’s instructions and label of the finishing product. Before you start, we recommend you apply the finishing product to a small exposed test area before finishing the entire project to insure it provides the intended result before proceeding.
  •  Certain metal products (including fasteners, hardware and flashing) may corrode when in direct contact with wood treated with copper-based preservatives. To prevent premature corrosion and failure it is important to follow the recommendations of the manufacturers for all metal products.
  • Mould growth can and does occur on the surface of many products, including untreated and treated wood, during prolonged surface exposure to excessive moisture conditions. To remove mould from the treated wood surface, wood should be allowed to dry. Typically, mild soap and water can be used to remove remaining surface mould.






NatureWood ACQ brochure