The ACQ preservative in Preserve treated timber is a copper plus quat system that provides the same level of protection to wood as CCA preservatives against decay, rot and termite attack (without the use of arsenic and chromium).
What is ACQ treatment?
The main active ingredient in ACQ is Copper, which has long been established as the most cost-effective preservative component used in timber preservation. Quat acts as the co-biocide in the ACQ preservative, providing additional protection from fungi and insect attack that copper alone would not control.
Quats are commonly used in household and industrial disinfectants and cleaners and are biodegradable in soil. Copper and quat solutions similar to ACQ are used for the control of fungi and bacteria in swimming pools and spas.