ACQ treated plantation pine sleepers & fencing.
ACQ treated fences, poles & sleepers are branded as
ACQ (ammoniacal copper quaternary) is a preservative, fungicide
and insecticide suitable for H1-H5 applications. It can be used as
a replacement for CCA (which contains copper, chromium and arsenic)
for most applications with the exception of marine exposure (e.g.
It is one of the compounds being used in place of CCA in many
countries including the US and Japan.
Unlike CCA, ACQ contains no arsenic/chromium compounds which
have toxicity concerns associated with its use and disposal. It may
be burnt and mulched. Availability for most applications is now
improving slowly. It is paintable.
Also of note, its does not turn the timber the 'green' colour
associated with CCA. A slight brown paint instead.
In the current wake of recent bans on the
use of CCA treated timbers in some uses, ACQ's use is on the
Information last verified 8th