Osmo Natural Oil Woodstain 2.5 Litres



Osmo Natural Oil Woodstain is a microporous & breathable oil based finish for exterior wood only. Water repellent, weather and UV resistant (not the 701 Clear) whilst retaining the appearance of the grain. It is also resistent to mould, algae and fungal attack. Easy to apply with excellent coverage. Large stocks including full range of sachets available.

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Please use the drop down menus to view all the colour & size options available
*All Colours are a representation and may differ from the actual colour once applied.
Order QTY Price per item You will save an additional
2 or more £81.65 £4.30 per item
4 or more £77.36 £8.59 per item


£85.95 Inc VAT

£71.63 Excl VAT

This works out at: £34.38 per litre
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1 coat(s):

2 coat(s):

We recommend 2 coats for new applications. Please note coverage figures are only a guide as coverage can vary depending on the wood and its condition.




Data Sheets



Osmo Natural Oil Woodstain is a decorative, satin (not the clear 701 which is matt), oil-based protective finish for exterior wood. It is microporous which allows the wood to breath and reduces the risk of swelling and shrinkage but it does not hide the grain. The finish is water-repellent, extremely weather and UV resistant. The finish contains active ingredients which protect it from mould, algae and fungal attack. The finish is proven over decades in all kinds of climatic conditions, and does not crack, flake, peel or blister.

Area of Use:

Osmo Natural Oil Woodstain is suitable for external use only as it contains biocides.

Key Product Features:

  • Easy to renew, no sanding or primer necessary, simply clean and apply remedial coat.
  • Easy to apply, does not dry during application.
  • Fast drying
  • The natural wood grain remains visible.
  • Weather & UV resistant (Nb. the clear version, 701, offers no UV protection)
  • Very resistant to water & dirt
  • Active ingredients protect against algae, mould, mildew and fungal attack
  • Reduces wood swelling and shrinkage
  • Microporous breathable finish so doesn't crack, flake or peel

Osmo Natural Oil Woodstain Standard Finishes:

  • Pine 700
  • Clear Matt 701 (No UV protection)
  • Larch 702
  • Mahogany 703
  • Oak 706
  • Walnut 707
  • Teak 708
  • Stone Pine 710
  • Ebony 712
  • Rosewood 727
  • Red Cedar 728
  • Fir Green 729
  • Oregon Pine 731
  • Light Oak 732
  • White 900
  • Basalt Grey 903
  • Patina 905
  • Pearl Grey 906
  • Quartz Grey 907
  • RAL Classic and NCS shades made to order

Bespoke Colours:

Osmo Natural Oil Woodstain is also available mixed to most of the Classic RAL colours and NCS colours, however as they are mixed to order there can be a delay of 3-4 weeks but please call us on 01235 427000 for further information. If ordering more than one bespoke colour, a separate order will be required for each colour.

A RAL Classic colour chart to help with choosing colours is available for purchase but can as long as it is in good condition be returned within 30 days for a refund, less the cost of postage.

Other colours and RAL Design colours are also available but there will be an additional £12 mixing fee (inc VAT) to pay.  Any colour described as Pearl or Luminous in the RAL range can not be made. Please note that Bespoke mixed colours can not be returned so ensure you are happy with the colour before purchase. Please add the colour code for the colour chosen to the delivery/order instructions when completing your order. All orders for Bespoke Colours must be placed on our website; unfortunately we are not able to accept telephone orders. Please be aware the type and condition of the timber can have a significant affect on the final appearance. 

Coverage for Osmo Natural Oil Woodstain:

1 litre of Natural Oil Woodstain will cover approx 26m2 on smooth timber and approx 12m2 on rough sawn wood. The coverage on absorbant timbers can be significantly improved by coating with 4001 WR Base Coat first. Please note grooved decking requires approximately 30% more than smooth decking due to the increased surface area.

Suitable Applications:

Osmo Natural Oil woodstain is suitable  for most exterior woods (dimensionally stable and non dimensionally stable): doors, windows and windowsill, carports, timber cladding, balcony, wooden decking, screens & fences, pergolas, garden houses and furniture. Please note that when applied to decking or any area subject to foot traffic only a single coat should be applied and then the product must be overcoated with anti slip decking oil (Osmo 430).

Product Application:

The wood must be clean, dry, frost free and have a maximum moisture content of 20%. When possible apply Natural Oil Woodstain to all sides of the timber before installation. Any previous application must be thoroughly cleaned before application, any non porous coatings such as paints and varnishes must be completely removed back to bare timber and any dust removed before any application.

Any organic growth of moss, lichen, mould etc must be removed with Osmo Gard Clean or Flag Asipo Algicidal wash before application, holes or gaps should be filled with a suitable Exterior Gap Sealer, grey or silvered timber can be removed with Osmo Wood Reviver Gel, end grain can be sealed with Osmo End Grain Sealing Wax and if any additional protection is required against insects, rot or blue stain the timber can be pre-treated with Osmo 4001 WR Base Coat.

Osmo Natural Oil woodstain should be applied with an Osmo Flat Brush, microfibre roller or any appropiate brush. It should be applied thinly along the grain and spread well. In normal climatic conditions allow to dry for approximately 4 - 6 hours with good ventilation before applying a second coat. For renovation a single maintenance coat is usually sufficient.

Please Note:

The colour tone created when you apply Osmo Natural Oil woodstain is influenced greatly by the natural tone of the wood and may deviate from the colour chart so a test area must always be done before the main application. Clear finishes offer no UV protection and are therefore not recommended for surfaces exposed to strong sunlight. Dried surface is satin-glossy at first and is afterwards satin. To extend the life of the finish, it is recommended to apply one final top coat of Osmo UV Protection Oil Extra 420 Clear or Osmo 410 after thoroughly drying. (Not recommended for White 900). Many wood species contain water-soluble coloured extractives which may leach out naturally when weathered. All colour tones can be mixed with each other.

Osmo Natural Oil Woodstain (with a minimum order size of 2.5 litres per colour)can be ordered in 186 RAL Classic and 1950 NCS colour tones but there will be a delay. Stains allow the subsurface to shine through. Depending on the wood species, the appearance of the colour tone may deviate from the original RAL/NCS colour tone.

Osmo Natural Oil Woodstain contains biocides and is therefore only to be used on exterior areas. The added active ingredients delay or minimize the risk of algae and fungal attack.

*Please note that the colour shades displayed are a true likeness of the original however different output methods (screens & printers) will cause variation in colour. In addition the colour will vary with the wood depending on age, pre-treatment etc and therefore it is always advisable to test on a small inconspicuous area first.

Tips When Using Osmo Natural Oil Woodstain:

  • Always allow resinous new wood at least 12 weeks to weather before applying.
  • Always do a test first, oils will exagerate and bring out the wood's natural colours.
  • Never apply too thickly, it will be no more effective, will take longer to dry and will give an uneven appearance
  • If you want the wood to grey naturally and evenly use 701 Clear Matt.
  • Multi purpose and standard domestic cleaners will damage the coating

Area of Use - Exterior only.

Suitable for Doors - Yes

Suitable for Doors, Windows & Joinery - Yes

Suitable for Decking - Yes

Suitable for Cladding, Fencing & Garden Buildings - Yes

  • Can I use Osmo Natural Oil Woodstain inside my house?

    Osmo Natural Oil Woodstain contains a biocide to help resist algae, mould, mildew or fungal attacks and therefore shouldn't be used inside.

  • Can I use Osmo Natural Oil Woodstain on Green Oak?

    The maximum moisture content of the wood for application is 20% and therefore Green Oak is not suitable for application for at least 5 -6 years.

Product Data Sheet

The Product data sheet for all except the clear version of Osmo Natural Oil Woodstain


Product Data Sheet

The Product data sheet for 701, the clear matt version of Osmo Natural Oil Woodstain


Health and Safety Data Sheet

The Health and Safety Data Sheet for Osmo Natural Oil Woodstain