Alkaline Copper Quaternary (ACQ) is a type of wood preservative that is widely used for the protection of timber products against decay and insect infestation. It is a water-based solution in which the active ingredients are copper oxide and quaternary ammonium compounds. ACQ is commonly used for pressure-treated lumber used in outdoor applications such as decking, fencing, and landscaping.
ACQ works by introducing copper into the wood fibers, which creates a toxic environment for decay fungi and wood-boring insects. The quaternary ammonium compounds provide additional protection against certain types of fungi and mold. This combination of active ingredients makes ACQ an effective and long-lasting wood treatment solution.
One of the advantages of ACQ is its effectiveness against a wide range of wood-destroying organisms, including termites, carpenter ants, and decay fungi. It is also considered a low-toxicity preservative, making it a safer option compared to older wood treatment methods that used highly toxic chemicals.
However, ACQ does have some drawbacks. It can cause corrosion on metal fasteners, so it is important to use treated screws or nails specifically designed for use with ACQ-treated lumber. Additionally, the greenish-brown color of ACQ-treated wood may not be as aesthetically pleasing as other types of wood preservation methods.
Overall, ACQ is a popular wood preservative that provides effective protection against decay and insects, making it a suitable choice for outdoor wood applications.
