Osmo UV Protection Oil Extra

  4.8/5.0 (377 reviews)
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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, 429A
GTIN 4006850770113, 4006850757152, 4006850770106, 4006850772056

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.

377 customer reviews
Easy to use by Albert

Best built up in light coats. Ideal for bringing out the beauty of Douglas Fir grain

Reviewed 750ml, Clear - 420 Extra on: 27/07/16
Worth the Money by Ross Bament

Application was very easy, used on external Iroko gate brings out the grain really well. Will use again!!

Reviewed 2.5L, Clear - 420 Extra on: 23/07/16
Very good by Charles

Just as it says on the tin. Have used the product on an external oak door together with it's associated base coat. After a few thunderstorms, it looks like it repels the water fine and at the moment (after just a few weeks) it looks like it is protecting the wood excellently.

Reviewed 750ml, Oak - 425 Extra on: 23/07/16
Great on oak by Brambles .

Hard wearing

Reviewed 2.5L, Clear - 420 Extra on: 22/07/16
I use on the garden benches I make it is perfect by Andrew Olley

Covers very well leaving a water resistant finish on new and old wood. Enhances the colour and grain.

Reviewed 750ml, Clear - 420 Extra on: 22/07/16
First class by Peter Gamblin

An excellent product, simply applied and producing a fine finish. It will take some time to verify it's UV protection effectiveness.

Reviewed 750ml, Clear - 420 Extra on: 21/07/16
Great cover and I really like the finish by Colm Fitzpatrick

I've used this product before. It covers well especially on a cabin that was probably a few years overdue for a treatment. I like the finish although the colour is a lot darker than I expected. I ordered Cedar , received Cedar which on the website is a reddish brown. What we have is more brown than red but I did paint to over a reddish brown Cedar ... It still looks great and I'm happy with the finished look.

Reviewed 2.5L, Cedar - 428 Extra on: 21/07/16
Easy to use Most economical product I've used by Kathryn Partridge

Gives a lovely finish - brings out the grain of the wood beautifully

Reviewed 2.5L, Clear - 420 Extra on: 20/07/16
Great stuff by Carl Francis

Just going to buy another tin it was that good

Reviewed 2.5L, Clear - 420 Extra on: 20/07/16
Brilliant by Vicki Hayes

Brilliant product.

Reviewed 750ml, Clear - 420 Extra on: 19/07/16
Fantastic product and value for money by Jennifer Tovey

Great product, does more square footage that stated in my opinion and goes on really well. Will have to wait see how it holds up in 5 years - that's a long time before I need to paint it again so really happy with that!

Reviewed 2.5L, Oak - 425 Extra on: 16/07/16
A New Experience using Oil by Francis Keenan

Ive used varnishes of all descriptions before but never used oil and up until now I'm impressed...easy to use, covers well and I'm just hoping it says what it says on the Tin and doesn't flake in a couple of years like all the varnish products I've used. Perfect for Brand New Hardwood doors.

Reviewed 750ml, Oak - 425 Extra on: 14/07/16
Good coverage and easy to apply by Derek Mair

Although it is expensive it is a great product...you get what you pay for

Reviewed 2.5L, Natural - 429 Extra on: 13/07/16
On exterior woodwork this is the only product I would use by Haydon Edwards

first started using Osmo exterior wood treatments about 4 years ago, never had a problem. Strongly recommend sticking to the instructions, in my case the first job still has not had another coat even after 4 years. Looks ok, but its getting a coat this year. Excellent products

Reviewed 2.5L, Clear - 420 Extra on: 12/07/16
Does what it says on the tin! by Paul Crawford

Excellent application via a microfibre cloth on a new Teak Lutyens bench. Went on a dream and really brought out the natural colours and grain of the wood. I used this after speaking to the helpline who assured me that it would be ok to use although it does state exactly the opposite on the website. The end finish was beautiful and only time will tell if really does stand up well but so far so good and good old Scottish weather will certainly give it a test.

Reviewed 2.5L, Clear - 420 Extra on: 10/07/16
Excellent by Geoff Evans

Exactly what I was after. Looks great when dry

Reviewed 125ml, Natural - 429 Extra on: 06/07/16
Good product by Geoff Evans

Has a satin finish but looks good when dry

Reviewed 5ml Sample, Clear - 420 Extra on: 06/07/16
Oily and waxy by Leedam Natural Heritage

Easy to apply. Hope it lasts a very long time.

Reviewed 2.5L, Clear - 420 Extra on: 06/07/16
Easy to apply by Mr T Weston

Easy to apply and blends in well to original work

Reviewed 125ml, Clear - 420 Extra on: 05/07/16
Excellent coverage Professional finish by Francis Miller

Wanted this for my exterior wooden doors. Very pleased with results so much so that I will shortly use the same brand for my interior doors

Reviewed 750ml, Oak - 425 Extra on: 05/07/16

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