Osmo UV Protection Oil Extra

  4.8/5.0 (445 reviews)
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2 coats = Recommended
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Wood type and application method can vary coverage.

Osmo UV Protection Oil Extra is a superior wood oil that acts like a "sun cream for wood". It offers superb durability against weathering with additional biocides.

  • Protects against greying with UV-Protection factor 12
  • Will not crack, peel, flake or blister and provides a microporous, breathable surface
  • Based on natural, renewable resources
  • All-in-one finish that also protects against mould, algae and fungi attack

Please note: 125ml tins are printed in German only.

Brand Osmo
No. of coats 2
Coverage Up to 20 per litre
Drying time 12 hrs
Size 5ml Sample, 125ml, 750ml, 2.5L
MPN 428S, 420S, 425S, 428A, 420A, 429A, 425A, 428C, 420C, 429C, 425C, 428D, 420D, 429D, 425D
GTIN 4006850770113, 4006850757152, 4006850770106, 4006850746651, 4006850477791, 4006850772056, 4006850684779, 4006850746668, 4006850477807, 4006850772063, 4006850684786, 4006850746675, 4006850477814, 4006850772070, 4006850684793

Perfect for use on all exterior timber including external doors, window frames, windowsills, carports, timber cladding, balcony, screens & fences, pergolas, garden houses and furniture. Osmo do not recommend that this product is used on flat horizontal surfaces where water can collect such as floors, decking and wooden steps.

IMPORTANT: The Osmo 429 Extra has been specifically designed to retain the natural, untreated appearance of lighter timbers such as Oak, Pine, Larch, however it is not suitable for dark exotic hardwoods as it may result in a 'milky' finish or appearance.

Ensure surfaces to be oiled are clean, dry and free from all surface coatings such as paint or varnish before application. Wood that has been previously oiled should be cleaned and lightly sanded.

New unpreserved or old wood should first be treated with a quality wood preservative such as Barrettine Wood Preservative or Ronseal Total Wood Preservative before applying Osmo UV Protection Oil. Using a wood preserver prior to applying the oil gives additional protection against mould, algae, dry rot, woodworm and other wood boring insects. Allow sufficient time for the preservative to dry, normally 24 to 48 hours, before applying.

As an alternative to spirit-based preservatives Osmo WR Base Coat 4005 can be used. This product penetrates deeply into the wood to help repel water and moisture. This helps to reduce the risk of timber swelling and shrinking therefore reducing the chance of the wood cracking, splitting and warping.

Apply in thin coats with a paint brush or velour roller ensuring that the oil is worked into the grain of the wood as opposed to painted on top of the wood. Always finish your brush or roller strokes by going in the direction of the wood grain.

The Clear Osmo UV Protection Oil Extra 420 Extra can also be used for lightening or overcoating Osmo Natural Oil Wood Stain for added protection and durability.

Over Application of Natural - 429 Extra will result in a 'white wash' finish and in the worst cases white swirls, brush marks and a sticky or tacky surface. A test area and trial application should be undertaken before starting any project.

Slightly tired looking areas can be easily refreshed by simply cleaning the affected areas and applying a fresh coat of Osmo UV Oil. Even badly scratched areas can be seamlessly repaired with a light sanding and a re-application of the oil.

Application brushes and other equipment should be cleaned with Osmo Brush Cleaner or White Spirit.

Osmo UV Protection Oil Extra has a shelf life of 5 years or more if kept sealed in the original tin. Store in a dry cool place. If thickened by cool temperatures or frost, the oil will regain its normal consistency within 24 to 36 hours of being returned to normal temperatures.

To preserve any remaining oil once the tin has been opened and used, decant any remaining oil into a smaller tin, jar or container, fill to the rim and seal with an air tight lid.

Osmo does not recommend that this product is applied to flat horizontal surfaces where water can collect such as floors, decking and wooden steps etc.

Be aware that rough sawn timber is more absorbent, meaning coverage per litre will be greatly reduced.

Q. We have a garden table which says only use Roble Wax and not Linseed Oil. I have searched for this product and even with the Internet I have not succeeded. The table was from B&Q. Please can you help me?

A. To my knowledge, it's only B&Q that offers the Roble garden furniture in The UK and the product recommended for finishing it is indeed hard to find. We have looked into this thoroughly and can confirm that Osmo's UV Protection Oil is ideal for Roble wood. As Roble is a dense, oily wood it is important to work the oil into the wood well and apply it thinly.

Q. I work for a joinery that makes and fits bespoke hardwood windows, doors and decking. Can Osmo UV Protection Oil be used on dense exotic hardwoods like Teak, Iroko, Ipe, Meranti and Garapa?

A. On the tin it states that Osmo UV Protection Oil Extra is not suitable for use on Iroko, Teak and other exotic hardwood timbers but we have customers that have used Osmo UV Protection Oil with success on these woods.

Lightly sanding with a 120 grit sandpaper helps to open the tighter, less porous grain of exotic hardwoods enabling the oil to penetrate easier. Wiping the timber down with methylated spirit prior to applying Osmo UV Oil can help to remove some of the natural oil from the surface of the wood which helps the Osmo Oil to penetrate. Ensure the oil is at a good room temperature as it thickens when cooler making application more difficult. Apply thinly working the oil into the surface grain of the wood.

Q. Can Osmo UV Protection Oil 420 Clear be used on garden decking?

A. Osmo says that this product isn't suitable for use on horizontal surfaces such as decking. This said however, we have customers that have applied one coat of Osmo Decking Oil then applied 2 very thin coats of Osmo 420 clear on top and have been happy with the results.

Osmo UV Protection wood oil dries in approximately 12 hours in normal climatic conditions of 23℃ / 50% relative humidity. Lower temperatures and higher humidity can increase the drying time.

445 customer reviews
Great product, easy to apply and looks fantastic by Jeremy Reed

Really pleased with how my Western Red Cedar cladding looks after being treated. It keeps all the natural hues of the wood and adds a very slight warming tone. Time will tell how it performs but for now I'm really happy.

Reviewed 5ml Sample, Clear - 420 Extra on: 19/09/16
Exactly what we were looking for by Scott Albertson

We have tried lots of clear UV resistant products and have found that nothing compares to this product. I only wish we had known about it years ago as we were protecting our entire cedar deck and siding.

Reviewed 2.5L, Clear - 420 Extra on: 17/09/16
Good all round wood treatment by Jeremy P Oddie

Fights the effect of UV. Expensive but well worth it

Reviewed 2.5L, Clear - 420 Extra on: 16/09/16
High quality reliable wood preserver by Chris Barnes

Used on an external oak porch, this product protects against UV and brings out the natural grain in the wood. Brilliant product.

Reviewed 750ml, Clear - 420 Extra on: 15/09/16
Very easy to apply by P Berresford

We used the cedar colour on our field horse shelter and it looks like new now!

Reviewed 2.5L, Cedar - 428 Extra on: 15/09/16
Very pleased with this product by Sally Braithwaite

In the past I have used OSMO UV protection oil Satin Clear on my oak back door. 5 years (and the sun!) have taken their toll on the door, so decided to use the same product but with some colour. Two coats on and I am pleased with the result.

Reviewed 125ml, Oak - 425 Extra on: 15/09/16
Top quality product by Fred
Reviewed 2.5L, Clear - 420 Extra on: 14/09/16
Brilliant by Adrian Blaza

Osmo UV Protection Oil is easy to use - easy to apply and goes on smoothly; the finish after one coat was excellent, but after two coats the wood was sealed and the colours of the wood (cedar in our case) 'shone' through. This was recommended by our installer (The Cedar Room Ltd) - and you can understand why

Reviewed 2.5L, Clear - 420 Extra on: 14/09/16
First time using this, it's fantastic by Jim Geelan
Reviewed 750ml, Clear - 420 Extra on: 14/09/16
As above by Jim Geelan
Reviewed 125ml, Oak - 425 Extra on: 14/09/16
It is very easy to apply by Leonard

the product is long lasting enhancing the colour of the wood. well worth the higher price of other materials.

Reviewed 2.5L, Clear - 420 Extra on: 12/09/16
Very impressed so far time will tell by Richard McKeown
Reviewed 2.5L, Clear - 420 Extra on: 10/09/16
Pricey but worth it! by Rob Large

used the protection oil to bring back to life the tired cedar greenhouse which existed at our new home. greenhouse now looks brand new and protected from sun and rain.

Reviewed 2.5L, Cedar - 428 Extra on: 10/09/16
Have used before and is excellent, will continue to do so by Annie Liverton
Reviewed 750ml, Clear - 420 Extra on: 10/09/16
Easy to apply and looks good when finished - satin by D H C

The product is easily applied and makes oak go a little darker - need two coats , when finished you are left with good flexible satin finish . will have to wait see how long it lasts / stays on, but my previous experience of Osmo is that thye are good products that do as they say.

Reviewed 750ml, Clear - 420 Extra on: 09/09/16
Good coverage and nice finish by Beryl Tingey

Have used the clear before and this brought out the natural wood grain and restored a little colour to the cedar wood. Bought this product in error, but more than happy with it. Will be interesting to see how it lasts, before fading.

Reviewed 2.5L, Cedar - 428 Extra on: 09/09/16
Easy to apply and economical by G G Walker

Very prompt delivery and well packaged. Quick to apply and nice result with little colour Change to the wood.

Reviewed 2.5L, Clear - 420 Extra on: 08/09/16
Great product wont use no other oil by Karen Prance

The oil may seem expensive compared to other makes, but is far superior and goes along way, have used it on oak frame extensions, stables, kennels and garden furniture.

Reviewed 2.5L, Clear - 420 Extra on: 07/09/16
Easy, effective and looks great! by Lisa Fisher

Really looks after your doors, we used this on our new oak door 18 months ago and it still looks like new. We also use it on our garden furniture. It's very economical and easy to use. We also use the indoor oils on woodwork inside the house and it is equally impressive! Definitely recommend it to anyone !

Reviewed 750ml, Clear - 420 Extra on: 06/09/16
Excellent product will definitely use again in the future by Kathryn Bullen

Although more expensive than other products I would not hesitate to use this again in the future.

Reviewed 2.5L, Clear - 420 Extra on: 06/09/16