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Osmo Natural Oil Woodstain

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Osmo Natural Oil Woodstain is a semi-transparent exterior wood stain containing natural oils and UV filters to protect against the greying affects of sunlight whilst offering excellent protection against rot, mildew and weathering.

Ideal for all exterior woodwork including decking, it's easy to apply, enhances the wood grain and texture and dries to a satin-matt finish.

The clear Osmo UV Protection Oil 420 (Extra) can be mixed with any Osmo Natural Oil Wood Stain colour if a lighter shade is required.

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  • Overview


Osmo Natural Oil Wood Stain is perfect for all exterior woods including doors, windows and windowsills, carports, timber cladding, balcony, wooden decking, screens & fences, pergolas, summer houses garden furniture and more.


Wood surfaces must be clean, dry and frost-free prior to application. Osmo Natural Oil Woodstain is ready to use straight from the tin with no need to thin.

This product should be stirred thoroughly before use and periodically during application. If possible, apply the first coat to all sides of the wood before installation to offer the best all-round protection.

For additional protection against mould, algae, dry rot, woodworm and insect attack, use a good quality wood preservative such as Ronseal Total Wood Preservative or Barrettine Premier Wood Preservative prior to applying Osmo Natural Oil Woodstain.

Osmo WR Base Coat 4005 protects against blue stain and rot but doesn't contain an insecticide.

Note: It's important to allow the specified drying time of any preservative before applying this product.


Always do a test area first

Apply thinly and evenly along the wood grain with either a good quality hand brush or Microfibre roller, and spread well. Allow for good ventilation whilst drying. Apply a second coat as before. The final surface quality is dependent on the woods surface structure. We therefore always recommend to test the product on a small sample area before complete application.


When renovating, simply apply one coat of Natural Oil Woodstain to the clean and dry existing finish, this will usually be sufficient.

Cleaning of equipment

Application brushes and other equipment can be cleaned with white spirit.


Can be stored up to 5 years or more if the original tin is full, tightly closed and stored in a dry place. If product becomes thickened by frost it will regain its normal consistency under normal temperatures within 24-36 hours.

To preserve any oil that is left over, pour the remaining product into a smaller container such as a tin, jar or bottle and fill to the rim so there is no or minimal air in the container. Protect the stored oil from temperature extremes of heat and cold.


  • Keep out of the reach of children.
  • Avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
  • May produce an allergic reaction.
  • If swallowed, seek medical advice immediately and show this container or label.
  • Use only in well ventilated areas.

Warning: Wash out any used cloth impregnated with this product immediately after use or store in an airtight container (danger of self-ignition).

Drying Time

Drying time is approximately 12 hours depending on temperature and humidity. If applied correctly (thin coats) it is normally touch dry in 4-6 hours. Lower temperatures and/or high humidity can increase the drying time.


Note: The transparent colour tone of the finish will be influenced by the woods natural colour, causing the result to deviate from the colour shown on the colour chart. Lightly pigmented (coloured) transparent finishes have little protection against UV influences and are therefore not recommended for surfaces prone to strong sunlight.

The dried surface gives a light satin finish at first but will change to a satin-matt finish thereafter. To increase the durability of the finish we recommend, after thorough drying, to apply a top coat of Osmo UV Protection Oil Extra. This is not recommended for the white Osmo Natural Oil Woodstain finish (product code 900) as the UV protection oil can make the white look creamy or an off white.

All colour shades can be mixed with each other to create any number of alternative colours if required

  • Reviews

Osmo Natural Oil Woodstain reviews - Rating: 4.7 out of 5 stars, based on 93 reviews.

Filter:   All reviews (93)   5 stars (72)   4 stars (17)   3 stars (3)   2 stars (1)  

John Williamson
 750ml, Mahogany - 703
Easy to apply - even colour
Used this to revive 2 old garden benches - very weary, had been painted and had lot of black staining. Sanded down and then applied stain with old cloth. Beautiful dark colour and amazingly even despite variation in wood.
 2.5L, Mahogany - 703
Expensive but good
Have used other colours before so i know the product works and doesn't peel or blister.Easy to apply. This colour is rich and true to it's name.
Peter Griffin
 2.5L, Pearl Grey - 906
Decking transformed
After 2 coats of preservative I used this to change the colour of my old decking from patchy brown to light grey. Also gave it a second coat which finished it beautifully and seems pretty tough. Rain just beads and runs off. Will always use Osmo in future.
 2.5L, Patina Grey - 905
Fan-flipping-tastic! Patina is a wonderful colour, does what it says!
If you want a light grey finish without it looking too plastic this is the product for you! Delighted with the effect on my wooden planters.
Marion Reilly
 125ml, Mahogany - 703
Yes I would use again I mixed it with clear and it turned out perfect
excellent product will use again before winter to keep decking looking great
Stephen Sims
 750ml, Light Oak - 732
Excellent service.
Order information was sent in a timely manner and in detail. Product arrive almost to the minute stated in the email. Well-packed and handed to me by a helpful and friendly delivery driver. What more could you ask for??
Elaine Forrest
 125ml, Basalt Grey - 903
We are using it mixed with oak to achieve the look we want
We tried various colours and decided to mix a few. The mix we liked the best was 2x basalt grey to 1x oak 706. We have decided on only 1 coat with clear oil on top as we don't want too dense a colour. The grey is more opaque than the other colours, fine if you want a New England look but we want to see the wood grain. However the summerhouse we have is quite big and we felt the oak was a bit too orangey the grey gives it a more mellow look .
J Ewen Macgregor
 125ml, Oak - 706
Very good.
Very good. But be careful of time taken to dry if cold and /or humid.
David Grigg
 125ml, Mahogany - 703
I have only applied 2 coats (due to weather) on my drive gates. the 3rd coat should show more dark colour.
Gerard Kirwan
 2.5L, Pine - 700
Excellent- easy to use and really soaks in
Excellent product. You can see it soaks in and produces a natural finish
Maurice Stapley
 2.5L, Red Cedar - 728
Have only applied 1st coat, looks good
Most important try many tester pots,colour varies with different timber so try little area before you choose colour.
Alan Robertson
 2.5L, Larch - 702
Easy to apply
Took a few attempts to get an even result with this. Colour tends to get darker nearer the end of the tin despite regularly stirring the contents.
John Turner
 750ml, Patina Grey - 905
In Stock, Great Service
Dependable in stock supplier at trade rates.
Carol McCunn
 2.5L, Oak - 706
Easy to use and looks great
Used this to protect and smarten up oak cladding that was fitted to the outside of my home 8 years ago and looking very tired. Now looks better than when new and rain water just runs off.
Sandra Shell
 2.5L, Larch - 702
Love this product. It produces a quality finish which appears to be hard wearing and waterproof. I have used it on decking, posts and post walling. Whilst the old untreated decking is becoming slippery the OSMO treated decking has never been slippery. The larch colour is a very natural brown which allows the grain and knots to show. It fits comfortably into the garden and compliments the Cotswold stone finish terracing. I have found that I have bought more and more of this product for additional decking, post and the floor of the summerhouse It took time to research available stains but I am so glad I did. I shall always use OSMO in the future.
Alan Cunningham
 2.5L, White - 900
The product is relatively expensive but you get what you pay for.
Easy to apply, couldn't scratch it when it had dried. Doesn't peel. Time will tell how good it lasts.
Matthew Brumby
 2.5L, Larch - 702
Nice Product
Spreads very nicely and provides a great finish, what you would expect for the price.
Katherine Warren
 750ml, Oak - 706
Suitable, great assistance, easy to use
The helpline helped enormously in choosing which was the most suitable product. The product went on easily and has the desired outcome. Perfect!
Des Pike
 750ml, Oak - 706
Good results and easy to apply
This product was recommended when we had a new summerhouse 5 years ago and we have used it annually since. It is a pleasing colour, easy to apply and gives good protection.
Brian Vardy
 2.5L, Oak - 706
Very Pleased
Used to treat aged Church Gates, had a lot of very pleasing feed back from passers by and people in the church

per litre
12 hours
dry time
  • Protects against mould
  • Water repellent
  • Weather & UV-resistant
  • Satin-matt finish

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* Coverage can vary depending upon on the type of wood used and the amount of product applied. Litreage amounts shown above are total, not 'per coat' amounts.
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