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MicroPro Sienna

MicroPro Sienna

What is MicroPro Sienna®?

Pressure treated with MicroPro Micronized Copper Azole (MCA), MicroPro Sienna® uses the most advanced preservative technology available in any wood used in residential application. The preservatives have been specially formulated for Canadian species and use, with iron oxide pigments added during pressure treatment to give the wood a warm, brown colour.

Sienna Brown Treated Wood

Not all browns are the same. Though most pressure treated wood can look green in colour, MicroPro Sienna® Treated Wood uses the most advanced preservative technology and features a warm natural brown tone, enhancing its grain and natural characteristics.

Products treated with the MicroPro Sienna® pigment colouring system have solid copper particles deposited into the wood to make it resistant to fading. Applying a water repellent to the wood as soon as it’s dry to the touch will help maintain its colour and surface as it may discolour over time due to varying exposure conditions and different wood species.

New MicroPro Sienna Treated Wood


Green colour may appear along the grain of the wood and around knots due to the copper in the preservative.

MicroPro Sienna Treated Wood Over Time


Over time, the green colour will soften and blend into the overall tone of the wood.

Actual product colour may vary from colour shown in photos.

Where Can it be Used?

MicroPro Sienna® can be used in residential applications (deck, fences, docks and landscaping) above-ground, in ground contact and in freshwater contact.


Ground contact

In fresh water

You’ll find the above-ground or ground contact usage indicated on the end tag attached to MicroPro Sienna® treated lumber. The MicroPro Sienna® treatment is backed by a lifetime residential limited warranty.

MicroPro Sienna® Key Features

Great Protection and Eco-Friendly

Great Protection and Eco-Friendly

Processed using patented MicroPro micronized copper preservative, MicroPro Sienna® Treated Wood has less than half the environmental footprint of traditional residential treated wood. The MicroPro process is certified as an Environmentally Preferable Product (EPP) by SCS and certified UL GREENGUARD Gold for low VOCs.

Improved Corrosion Resistance

Improved Corrosion Resistance

MicroPro Sienna® is no more corrosive to metal products than untreated wood. Consider the surrounding environment and building codes when choosing the correct fasteners and hardware.

Approved for Aluminum Contact

Approved for Aluminum Contact

Aluminum building products may be placed in direct contact with MicroPro Sienna® treated wood products used for interior uses and above ground exterior applications, where the wood is not exposed to frequent and prolonged wetting.

Fungal Decay & Termite Protection

Fungal Decay & Termite Protection

To protect the wood against fungal decay and termite attacks, MicroPro Sienna® Treated Wood products are pressure treated with MicroPro® Micronized Copper Azole (MCA). Copper, which has long been known as an effective wood preservative is the main ingredient in the preservative system. MicroPro Sienna® uses micronized copper coupled with micronized azole for long-term protection of wood exposed in exterior applications.

Finishing Touches


If You Cut It, Seal It

To easily seal exposed cuts and holes in your pressure treated wood use Cut-N-Seal®, a colour-matched brush-on sealer and moisture repellent.

  • For use above ground on deck boards, railings, posts tops and fence boards
  • Low odour, water-based formula
  • Ready to use
  • Easy soap and water clean-up

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