Exterior Timber Stains and Oils

Preparation and application

    Allow any new dense or resinous timbers such as Jarrah, Teak, Kwila, Cypress Pine and other hardwood timbers to weather for 4-6 weeks before staining.
    Allow new LOSP (Light Organic Solvent Preservative) Treated Pine to weather for 2 weeks prior to application. • If the timber has a shiny ‘dressed’ surface or patches on the surface from the timber production process, sand using 150 grit sandpaper to allow for adhesion and penetration of the stain or allow to weather for up to 6 weeks.
    Decide on the product and colour you would like—to help you we have 250mL test pots.
    Choose an off-cut piece of timber and apply the product in exactly the same way, with the same number of coats, as you will on the actual surface.
    Ensure timber is clean, dry and free from dirt, grease, oil and other contaminants. Galvanised nails should be used to avoid rust stains. If mould is present remove as much mould growth as possible by scraping and stiff brushing. Apply Wattyl Deck & Timber Prep, following the label instructions and allow to dry.
  4. APPLICATION Stir the Wattyl Forestwood thoroughly before and occasionally during use to ensure a uniform colour. For added colour consistency mix and box all cans on the site before use. Partly used cans of Forestwood Stain should be used within 3 months.


Apply one coat worked well into the timber using a good quality brush. Rough sawn timbers may require a second coat, but generally one coat is sufficient. Allow to dry overnight between coats. For new work a second coat should be applied after the first summer’s weathering. Resist the temptation to apply excess stain, to be effective stains must penetrate the timber, not remain on the surface. Excessive applications of stain can create a varnished look that may lead to premature failure.

Care and maintenance suggestions for exterior stained timber
Exterior stained timber will benefit from yearly washing of the surface to remove surface contaminants. Use Wattyl Deck & Timber Prep, following label instructions.
It is not recommended to use high pressure water blasting on timber surfaces.


Regular maintenance of finished timber surfaces is important. Because it is a natural product, timber requires regular attention to prevent the onset of changes that can ultimately lead to deterioration. The timber type, finish, colour chosen and the customer’s expectations are all involved in setting the maintenance cycle.

  • The stated time for first maintenance is the expected period within which a northerly facing wall will begin to show signs of needing repair.
  • The subsequent maintenance period is based on the ongoing requirement of the same wall for continued attention to maintain an acceptable appearance.
  • Stains are designed to penetrate the timber. Application of excess stain will form a layer on the surface, giving no benefit and may ultimately peel off. It is recommended that when maintaining a stained building, the exposed, weathered areas receive one coat of stain, and then one full coat of stain is applied to the entire building. This avoids the excessive build-up of stain in the sheltered areas of the building.

Cedar dressed face board Cedar band-sawn face board Pine dressed face board Pine band-sawn face board.

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