Masseys DIY Store

Osmo Decking Oil Douglas Fir 2.5L

RRP £59.99

Availability: In stock

SKU: 004d Categories: ,

Osmo Decking Oil Douglas Fir 2.5L


  1. Natural wood character remains visible
  2. Safe for humans, animals and plants once dry
  3. Highly water and dirt resistant
  4. Breathable therefore reducing water logging, swelling and shrinkage
  5. Microporous, penetrating finish which does not crack, peel or flake
  6. No sanding necessary when topping up coating



Bare wood species with a high content of natural wood extractives need to weather off (min. 4 weeks) before the initial treatment or be cleaned with Osmo Brush Cleaner and Thinner (degreaser).
Resinous wood, such as Larch or Douglas Fir, needs to weather off for at least 6 weeks to improve absorbency. Pressure impregnated wood and tropical species like Massaranduba, Bangkirai, Garapa, Iroko need to weather off for at least 3 months. Cedar requires a 3 month weathering period to improve absorbency.

Greyed and weathered wood can be refreshed with Osmo Wood Reviver Power-Gel before applying Osmo Decking Oils. Avoid using jet / power washers to clean the surface as they can significantly affect the coverage of Osmo Decking Oils. Wood surface must be clean, dry and frost-free (moisture content max. 20%).
Osmo Decking-Oil is ready to use. Do not thin. Stir well using a flat stirring stick or spatula before use.

Thoroughly clean or lightly sand old microporous stains or completely remove old varnishes before application. If any sanding works are carried out some fresh wood species must be weathered as directed above to improve absorbency once more. Sanding to finishing grades of no more than a P120 grit are recommended. Always wear a dust mask when sanding.
If possible, and if the wood is absorbent please apply the first coat to all sides before installation.
The finished surface is influenced by several factors, including the condition of the wood. Therefore, a trial application is always required, especially for unfamiliar surfaces.
If additional protection against blue stain, rot and insect attack is desired ( eg soft woods) , pre-treat the wood, if possible on all sides, with Osmo WR Impregnation.


Use stiff brush (Osmo Flat Brush) or a lint free cloth (e.g. for furniture) and apply thinly and evenly to the clean and dry wood surface along wood grain.
For a quick and easy application, we recommend using Osmo Decking Brush (150 mm) which was tailor-made for decking and allows you to apply the finish while standing.
Allow for good ventilation while drying. Lower temperatures and higher humidity levels will delay drying.
Once dry apply the second coat – also thinly.
If a less intensive colour is desired, the second coat should be carried out with clear Anti-Slip Decking Oil 430. Generally the more rich and dark the colour chosen, the higher the level of UV protection offered. Avoid applying clear Anti-Slip Decking Oil 430 as a stand alone finish as this offers limited UV protection.


Top Tips:

  1. For a clear and natural finish for decking, apply just two coats of 007 Teak Oil, which allows the wood to naturally grey over time.
  2. The darker the colour, the slower the greying process of the wood will start to appear.
  3. Osmo Anti-Slip Decking Oil 430 can be used as the second coat after any of the coloured Decking Oils to provide a slip resistant surface.
  4. Recommended application is 35ml/m²

Additional Information:

  1. Approx. coverage: 24m²/L with one coat
  2. No. of coats: 2
  3. Ideal application temperature: +10°C to 35°C
  4. Drying time: 12 hrs
  5. Sizes: 0.125L, 0.750L, 2.5L

Osmo Decking-Oils protect, maintain and beautify the wood surface, producing a smooth, slightly satin finish which is extremely water resistant and dirt repellent. The microporous finishes are based on natural vegetable oils and allow the wood to breathe and regulated moisture content. By doing this swelling and shrinkage is reduced. The penetrated finish will not crack, flake, peel or blister.