Pine Timber Products

Technical » Timber Preservative Treatments

CCA – (Copper, Chromium and Arsenic salts)  

CCA is a water-borne preservative treatment of pine timber. CCA is pressure impregnated into the wood and has a high resistance to chemicals leaching out of the timber over time. This high resistance is due to the chromium which locks in the elements of copper and arsenic into the wood. The arsenic and copper elements protect from insect and fungal attack. Pine which has been treated with CCA is clean, odourless and has a slight green colour. 

LOSP – (Light Organic Solvent-borne preservative)

LOSP is a solvent-borne preservative treatment of pine timber. The organic solvent takes the preservative into the wood and is drawn out in the last stages of treatment leaving the preservative in the wood. LOSP treated pine has long lasting protection against decay and insect attack. LOSP treated timber is great for appearance applications such as external joinery, due to it leaving the light coloured appearance unchanged after treatment.

ACQ – (Alkaline Copper Quaternary)

ACQ is a water-borne preservative treatment of pine timber. The ACQ treatment process is similar to CCA but is free of arsenic. Instead uses copper and ammonium compounds as agents against insect attack, fungi, termites and wood boring insects.

After pine has been treated with ACQ its appearance can range from dark green to brownish green and can be stained or painted once dry.

Copper Azole (Tanalith E) 

Copper Azole or Tanalith E as more commonly known is a water-borne preservative treatment of pine timber. The preservative contains copper, boric acid and tebuconazole and is a new generation arsenic free preservative treatment. The copper in the preservative acts as a fungicide and the tebuconazole as an insecticide. After treatment the pine has a green colour and after weathering will change to a honey brown colour. Tanalith E treated timber is usually specified for in and out of ground applications where there is a medium to high risk of decay or insect attack. 

Tanalised® T

Tanalised T is a safe organic based insecticide treatment which protects wood against termites.  It is made up of a common insecticide called permethrin and a linseed oil blend, which makes it safe and cost effective.  The timber treated with this treatment is used for framing and roof trusses in construction.  There are two versions of this treatment, one blue in colour which is only suitable for used in areas south of the Tropic of Capricorn and red which is suitable for all areas in Australia.  Koppers Arch guarantee this treatment for 25 years when used in accordance with the building code and Australian Standards.