LOSP Treatment

The complete treatment solution

For the past 25+ years, Dindas Australia has been setting standards for reliability, customer value and quality in light organic solvent preservative (LOSP) treated timber. We Provide a range of treatment classifications for solid pine and engineered timber, including I-Joists, laminated veneer lumber (LVL), laminated beams, plywood, framing, outdoor structural timber, skirtings and mouldings.

LOSP treatment, unlike water-based pressure treatments, does not increase the moisture content of the timber, meaning that there is no drying process required after the treatment. this has advantages of enabling fast turnaround on customer orders, eliminating the need for large costly storage areas and drying facilities, and ultimately providing our valued consumers with a reliable, cost-effective product.

Our LOSP process for treated timber also has the added advantage of maintaining dimensional stability during and after pressure treatment, due to moisture levels remaining relatively consistent – perfect for the precise tolerances of engineered timber products. The timber treatment varies in colour with our H3 option the only clear durable option on the market. This exclusive clear treatment offers the natural tones of featured products to be preserved in visible applications.

The Dindas treatment facility provides custom services for merchants and wholesalers with the capability of treating timber to an

impressive 13.2 metres in length along with years of technical expertise to match specific treatments to specific requirements. Treatments used by Dindas are supplied by our chemical partners Koppers Performance Chemicals, who provide regular specialist auditing of our plant on a regular basis to test and review the quality and consistency of Kopper’s treatments in our range of products.

From Architects and Building Designers to landscapers and homeowners, you can rest assured when specifying timber from the treated range for all structural, outdoor and above ground building needs.

Treatment Classification Range

    • H2 F – Translucent Blue
    • H2 – Translucent Red
    • H3 – Translucent Green

Speciality Options

    • H1 – Clear
    • H3 – Clear

Piece of Mind Benefits

  • Ideal for re-manufactured and engineered wood products
  • Durable and safe protection
  • Dimensionally stable (due to the LOSP treatment process)
  • Non-corrosive to nails and fixings*
  • Quick turnaround – ready in 48 hours
  • Long lengths up to 13.2m
  • 25-year guarantee** against insect attack and decay

* Installers should always check the type of fixing coating system that has been approved for treated timber use.

**Conditions Apply

Peace of mind – 25-year guarantee

Dindas has built a reputation as a leader in timber treatment. From engineered wood products to landscape products to structural framing and appearance grade timber, our wood treatment process enables a sustainable natural resource to last longer than it otherwise could. LOSP treatment is the most advanced, proven, water-free timber treatment and provides superior protection against termite and fungal attacks.

Termite Hazard Map

Timber Hazard Class Guide

Proud partners of Koppers Performance Chemicals. For more information » click here

Treatment Resources

For further information on Dindas LOSP, treated products and Kopper’s Performance Chemicals visit our Technical Resource Library


Dindas currently imports from New Zealand, the West coast of USA, Canada, Europe and South East Asia...