Osmo Natural Oil Woodstain Effect


Osmo Natural Oil Woodstain Effect, a decorative silver-metallic, oil-based protective finish for all wood in outdoor areas, including:

    • Windows and window shutters (dimensionally stable elements)
    • Doors - Carports - Timber cladding - Balconies - Fences - Pergolas
    • Garden furniture - Summer houses (dimensionally unstable elements)
  • Extremely weather and UV resistant - Very water and dirt resistant
  • Resistant to mould, algae, mildew and fungi
  • Reduces wood swelling and shrinkage - Natural wood grain remains visible
  • More benefits and suitable wood types below
  • Larger sizes available - minimum quantities and longer lead times may apply, contact us for more information
  • Samples also available

£56.55(ex. VAT)
£67.86 (inc. VAT)
Please choose your colour
Available for Delivery (See Delivery Options Below)


Osmo Natural Oil Woodstain Effect, a decorative silver-metallic, oil-based protective finish based on natural oils for any wood in the exterior. Ideal for all wood in outdoor areas including doors, windows and window shutters (dimensionally stable elements), carports, timber cladding, balconies, fences, pergolas, garden furniture and summer houses (dimensionally unstable elements). Samples also available.

The finish contains active ingredients to protect against mould, algae and fungal attack and has proven itself over decades, and also under extreme climatic conditions.

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Features & Benefits

  • A transparent, satin wood protective finish with metallic effects
  • Based on natural oils
  • Ideal for all wood in outdoor areas
    • Doors
    • Windows and window shutters (dimensionally stable elements)
    • Carports
    • Timber cladding
    • Balconies
    • Fences
    • Pergolas
    • Garden furniture
    • Summer houses (dimensionally unstable elements)
  • Extremely weather and UV resistant
  • Very water and dirt resistant
  • Resistant to mould, algae, mildew and fungi
  • Reduces wood swelling and shrinkage
  • Natural wood grain remains visible
  • Microporous, breathable finish which does not crack, peel or flake
  • No sanding necessary for future applications

Finishes & Examples

Suitable & Recommended Wood Species


For all other wood types not specified, always trial apply.

  • Oak
  • Beech
  • Ash
  • Alder
  • Birch
  • Thermowood and Thermally Modified Timber (TMT): prone to grey very fast and therefore application is recommended within the first two weeks after processing. Decking-Oil 010 Thermowood is optically suitable.


Also Recommended:

For the following wood types, WR Base Coat is recommended before use.

  • Douglas Fir
  • Pine
  • Spruce
  • Accoya
  • Kebony


Recommended After Weathering Period:

For the following wood types, a weathering period is recommended. New or sanded wood requires at least 12 weeks (approximate) exposure to the exterior elements before application.

After the weathering period, it’s generally recommended to de-grey the surface with Osmo Wood Reviver Power-Gel and clean the surface from the extractive content before application, always trial apply!

All other ingredient-rich hardwood species not mentioned may require a varied period of exposure. Please contact us for further information.

  • Cedar
  • Iroko
  • Mahogany
  • Teak
  • Walnut
  • Ipe
  • Merbau
  • Wenge
  • Rosewood
  • Sycamore
  • Pressure-Impregnated Pine
  • Sapele: 3-4 weeks exposure
  • Larch: 2 weeks exposure. Application of WR Base Coat is recommended before use.


Not Recommended:

  • Green Oak: moisture content is often above the maximum 20% recommended.
  • Idigbo: contains yellow dyes which leaches when the wood becomes wet and stains when in contact within iron.
  • Other: woods treated with a varnish, lacquer or other surface coatings must be completely sanded before use.

Notes & Tips

  • For new or sanded ingredient-rich wood species, please allow approx. 12 weeks exposure to the outside elements prior to application.
  • The transparent colour tone of the finish will be influenced by the wood’s natural colour, and testing first is always recommended.
  • Over application can increase the drying times.
  • Use biocides safely. Always read the label and product information before use.
  • Recommended application amount is approx. 35 ml/m².
  • Drying time of 4-6 hrs after the first coat, 12 hours thereafter both coats have been applied.
  • Grey wood looks classically beautiful. The natural greying process, however, occurs quite unevenly. Thereby UV rays from the sun destroy the lignin in the wood; afterwards rainwater washes it away. Therefore the part of the cladding that is protected by the roof greys more slowly than than storeys underneath. The result is a spotted, less attractive “zebra house”.
    • With grey and silvery shimmering wood stains from Osmo, now an elegant solution has been created, which lets the whole cladding shine in a stately grey from the very beginning, without waiting for the natural greying process.
    • Among six different grey and silver tones (3 grey-satin tones from Natural Oil Woodstain, and 3 silver-metallic tones from Natural Oil Woodstain Effect), there is a fitting solution for every architectural style and for every other taste.
    • The cladding appears especially lively when the grey tones change in fine nuances. So, for example, profiles can be installed so that they alternative between the tones: [905 Patina] [906 Pearl Grey] [907 Quartz Grey] Or, one sets a single silver profile among grey planks.
  • For more grey tones, see Osmo Natural Oil Woodstain.
  • For opaque colour tones, see Osmo Country Colour.

Product Details

Data sheet

Interior / Exterior Use
Water / Solvent Based
For Use On
Application Method
Brush, Roller
Standard / Ready Mixed
Single, Two or Three Pack
Pack Size
750ml, 2.5L
26 m²/l per coat
Recommended Thinner/Cleaner
Osmo Brush Cleaner
400 g/l
Shelf Life (from date of manufacture)
Up to 5 years
Drying time
12 hours at 23°C
Specific Gravity
0.97-1.0 g/cm³
43-60s DIN EN ISO 2431/4 mm
55°C acc. DIN EN ISO 2719
Exterior / Interior Use
Exterior Use
Type of Wood Finish
Wood Stain

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

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