Osmo UV Protection Oil Extra

  347 customer reviews
Recommended 2 coats
enter area above

Wood type and application method can vary coverage. Litreage amounts shown above are total, not "per coat" amounts.

On-screen colours may vary according to different screen calibrations. We therefore always recommend applying a test area.
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  • 2 coats
  • Coverage: 20m²/L
  • 12 hrs drying time
  •  Protects against greying
  •  UV-Protection factor 12
  •  Will not peel or flake
347 reviews

Osmo UV Protection Oil Extra is a superior wood oil that protects timber against the greying effect of the Sun's UV rays by a factor of 12 - acting as a "sun cream for wood". It offers superb durability against weathering with an added biocide to combat against mould, algae and insect attack.

Please note: 125ml tins are printed in German only. For application instructions refer to the overview below.

Available in Clear (420), Cedar (428), Oak (425) and Natural (429). 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.

Osmo 420, 425, 428 and 429 - Key Features

  • Slows greying of wood
  • Will not crack, peel, flake or blister
  • Based on natural, renewable resources
  • Final finish protects against mould, algae and fungai attack
  • Oiled finish provides a microporous, breathable surface
  • Foundation and top coat in one

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.

Osmo UV Protection Oil Extra reviews

Rating: 4.8 out of 5 stars, based on 347 reviews.
Filter:   All reviews (347)   5 stars (286)   4 stars (49)   3 stars (8)   2 stars (2)   1 star (2)  
Excellent by Mrs J

Revitalised some outdoor furniture with this and it looks great. I've used Clear and Oak, the latter is actually my preference but both look really nice. This was used on teak but it was sanded right back first and worked a treat.

Reviewed 750ml, Clear - 420 Extra on: 22/06/16
Great product, fantastic results by PaulN

I bought this to treat a set of oak driveway gates. It was easy to apply & the results are stunning. It really brings out the grain in the wood, leaving a lovely finish. Turned good-looking gates into fabulous gates. I'd definitely use it again.

Reviewed 2.5L, Clear - 420 Extra on: 22/06/16
Just what I needed by P Kyan

Great finish looks better than I anticipated

Reviewed 750ml, Clear - 420 Extra on: 21/06/16
It does what it says on the tin by Sue Rose

Easy to use, goes on like a dream.

Reviewed 2.5L, Natural - 429 Extra on: 20/06/16
Excellent by Ian Pointon

Weather proofing and finish fantastic

Reviewed 2.5L, Clear - 420 Extra on: 19/06/16
It coloured the wood far more than I expected by David Miller

A lot more sticky and varnish-like than I expected for an oil

Reviewed 125ml, Oak - 425 Extra on: 19/06/16
Good stuff by Dave Hinton

Easy to apply and great on exterior oak. I've even now had to use this on a friends porch.

Reviewed 2.5L, Clear - 420 Extra on: 16/06/16
Easy to use by Lesley Coombe

Lots of thin coats give a good finish.

Reviewed 750ml, Clear - 420 Extra on: 14/06/16
Best I have used to date by Shaun McGrail

Bought this product on advice from WFD to treat a new summer house. Very easy to apply, excellent coverage rate and perfect colour for our needs. Like most things, you get what you pay for and this premium product is worth the money. I have now bought the clear version for another project.

Reviewed 2.5L, Oak - 425 Extra on: 13/06/16
Really enriches the beauty of the wood by Mohjir Baloch

Easy to apply- neutral colouring much more natural than Danish oil

Reviewed 125ml, Clear - 420 Extra on: 12/06/16
Simply the best by Clive Cargill

Easy to apply and our patio fence looks great.

Reviewed 2.5L, Clear - 420 Extra on: 10/06/16
Very easy to use, looks very nice by Anthony Edwards

I had already used Osmo materials on inside floors so was happy to try this one. I was not disappointed, it still looks very good even after extremes of rain and sun. I am going to re - coat all of our patio balustrading with this material as I rate it so highly.

Reviewed 2.5L, Clear - 420 Extra on: 07/06/16
Very good by Bill Denholm

Excellent product, easy to apply and dries to good finish

Reviewed 2.5L, Cedar - 428 Extra on: 07/06/16
Expensive, but quality product by WezT

Expensive brand but it goes a very long way and ir is a quality product. I have 100% confidence in its long term performance.

Reviewed 2.5L, Clear - 420 Extra on: 06/06/16
Very good by Sarah Scott

Looks good at the moment, time will tell

Reviewed 125ml, Clear - 420 Extra on: 05/06/16
Best of the Best by David Fell

Used this product (clear) on a large cedar summer house, fantastic product. Used the base product first. Now this may be of interest to some of you. I asked Osmo tech when to apply this product on cedar and was told to wait 12 weeks. One week after completion it rained hard for two days and you could see water being sucked up by the cedar on the inside which had not been lined at this time. The stainless steel nails used were a tight fit also. I treated the cedar once dry with two coats on top of two base coat of their clear water based treatment. The cedar soaked it in within a few hours and I don't do light coats lol. Result one watertight great looking summer house. In fact I'll wait until the backend and give it at least one more coat. So when I do the next cedar shed I'll treat it right away and advise you to do the same with cedar. I used twice as much as it says on the tin which I find the norm for most treatments/products. 5 litres used to date. Another tin wil be ordered soon.

Reviewed 2.5L, Clear - 420 Extra on: 04/06/16
Tried this last year on the house It was great so bought more to do my garage doors by Kevin Stewart

Brilliant easy to apply with brush lasting well after one year in full sun so recently bought another tin for my garage doors

Reviewed 2.5L, Oak - 425 Extra on: 04/06/16
Excellent product easy to use by Anne Roach

This product is excellent immediately lifts the look of oak barn doors and protects for another year. Will continue to use yearly .

Reviewed 2.5L, Clear - 420 Extra on: 03/06/16
Excellent finish easy to use by John Childs

An easy to use coating that allows quick coverage with an excellent finish.

Reviewed 750ml, Clear - 420 Extra on: 01/06/16
Brilliant by Suzie Shepperson

Excellent easy to use. Made fence look great. Just wear gloves as sticky on skin. V highly recommended. My fences still look brand new! Friends often comment and makes the quality of fences look much better

Reviewed 2.5L, Clear - 420 Extra on: 01/06/16

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