Osmo UV Protection Oil Extra

  283 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.

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  • 2
  • 20m²/L
    1 coat
  • 12 hrs
  •  Protects against greying
  •  UV-Protection factor 12
  •  Will not peel or flake
283 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. It offers superb durability against weathering with an added biocide to combat insect attack and fungal growth.

Easily applied with a paint brush or velour roller. Available in clear or as two attractive colours, Cedar and Oak. Dries to a clear satin finish that will not peel, flake or blister.

Can also be used for lightening or overcoating Osmo Natural Oil Wood Stain colours. Also available Osmo UV Protection Oil Extra Natural which helps retain the untreated appearance of timber.

Please be advised that 125ml tins are printed in German only. For application instructions refer to the overview below.

Osmo UV Protection Oil Overview

Osmo UV Protection Oil is available in clear (420) or coloured / pigmented variations including Cedar (428) and Oak (425). Perfect for use on all exterior timber including external doors, window frames, windowsills, carports, timber cladding, balcony, screens & fences, pergolas, garden houses, furniture and more.

Osmo UV Protection Oil Extra has been designed to combat the greying effects of the Sun's UV rays on exterior wood. Can be applied to a wide range of exterior soft and hard woods including Pine, Larch, Teak, Oak and Bamboo.

Exterior timbers turn grey or silver over time as a result of exposure to the sun and rain. Osmo UV oil acts as a 'sun cream for wood' slowing the greying process by a factor of 12 when compared to untreated wood.

Osmo UV Protection Oil also contain Biocide which helps to protect timber from the onset of mould, algae and insect attack.

These UV Oils are micro-porous, thus allowing the wood to breathe. As the oil penetrates into the surface of the timber, it doesn't form a surface coating, so will not crack, peel, flake or blister. Osmo 420 clear and 425 Oak penetrate deep into the grain aiding the natural elasticity of the wood and helping to reduce shrinkage and swelling.

Osmo 420 clear & 425 Oak - Key Features

  • 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
  • For use on dimensionally/non dimensionally stable exterior wood
  • Dries in approximately 12 hours under normal conditions
  • 2.5Ltrs tin covers approximately 45 square meters based on 1 coat

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 'Osmo 420 Clear' or 'Osmo 425 Oak'.

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. Note: this product does not contain an active insecticide.

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. Osmo UV Protection Oil Extra 420 can also be applied over Osmo Natural Oil Woodstain as a top coat for added protection and durability.

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 recommends that this product is NOT used on horizontal surfaces where water can collect such as floors, decking and wooden steps etc.

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 283 reviews.
Filter:   All reviews (283)   5 stars (232)   4 stars (44)   3 stars (5)   2 stars (1)   1 star (1)  
Applied well though a little thick I think by Ella Sanders

Took a while to dry due to inclement weather, now it is dry it looks amazing on our oak porch. Trust that it will do as it says and protect from the UV rays of the sun and prevent the greying that can happen to oak,

Reviewed 2.5L, Clear - 420 Extra on: 06/02/16
Lovely finish by Christine Welch

I bought this to protect my new oak porch , it was easy to apply and left a lovely finish .

Reviewed 2.5L, Clear - 420 Extra on: 12/01/16
Great finish by Gerald Adams

Really easy to apply, seems to outlast anything else I have tried

Reviewed 750ml, Clear - 420 Extra on: 09/01/16
Does what it says on the tin by Glen Jackson

Seems good quality. Drying time longer than thought

Reviewed 2.5L, Clear - 420 Extra on: 07/01/16
Great finish and support about the product by C Osland

This product was great on my new door loved it

Reviewed 750ml, Clear - 420 Extra on: 19/12/15
Exellent by Tom Armour

Made 3 gothic style arched doors in American white oak for local church, finished with 3 coats of osmo oil, perfect satin smooth finish exellent

Reviewed 2.5L, Clear - 420 Extra on: 08/12/15
Great product and price, by Paul Bagley

Used this to treat my cedar cabin and it looks georgous on. It does take a while to dry though as the drying times stated are allowing for it being 23degrees! goes on nice and easy.

Reviewed 2.5L, Clear - 420 Extra on: 07/12/15
I like this product by D Puttock

I used this product,to protect a gate sign,but will continue to use it on other jobs,as I found it easy to use,and it left a good finish.

Reviewed 750ml, Clear - 420 Extra on: 05/12/15
Excellent Product by Michael Brazier

Excellent product - easy to apply and very economical - a very resilient finish.

Reviewed 750ml, Clear - 420 Extra on: 03/12/15
Really good product by John Earth

I was not sure if I needed to apply this protection oil after treating my new gates with an Osmo walnut stain from the same firm but two coats of the protection oil really enhanced the finish to the gates and hopefully will provide the extra protection.

Reviewed 750ml, Clear - 420 Extra on: 01/12/15
Really keeps my larch clad extension looking tip top by Jonathan Early

Bought this as a top up tin ready for the spring. Previously coated larch cladding still looks great after a year. No "greying". Want to build the coats up in the spring to keep it that way and then think I'll be okay leaving it for a couple of years before recoating. Working a treat and good to see water drops being repelled rather than sinking into the wood.

Reviewed 2.5L, Clear - 420 Extra on: 28/11/15
Should be good by Chris Winfield

I have used OSMO products before and they are excellent. I haven't yet used this one. The key will be how well it weathers.

Reviewed 2.5L, Clear - 420 Extra on: 23/11/15
Great service after initial problem customers services called back and went the extra mile! by Matt Haynes

Great product used for red cedar office and gates eay to use looks great leave to dry overnight before second coat.

Reviewed 750ml, Clear - 420 Extra on: 19/11/15
Easy to apply and did the job by Antony Poulton

We wanted to retain the colour of our western red cedar cladding and after using a sample from Wood Finishes Direct of the clear UV Protection oil I decided that this was the best option. 1 tin covered a new extension that we had build this year and it looks brilliant - brightens the colour and repels water well. I hope it lasts!

Reviewed 2.5L, Clear - 420 Extra on: 16/11/15
Looks Good ! by Brent Buskell

I can't really say if this product does what they say, because it should protect the timber over a long period and I've only just applied it to the door! It does look smart though !

Reviewed 125ml, Clear - 420 Extra on: 07/11/15
Excellent product and service by Wendy Green

I have previously used Danish oil on my exterior oak doors getting terrible blistering and peeling every year. I have used Osmo oil on an oak floor inside with excellent results, so tried Osmo Exterior. I chose the oak oil as the doors had gained a mottled effect with the flaking danish oil. The result is excellent. Lovely colour and sheen and mottling disguised. Now just hope it lasts. NB The oil was colder when I did the 2nd door so was harder to apply and longer to dry. So make sure you store the oil in the warm if using through autumn/winter.

Reviewed 750ml, Oak - 425 Extra on: 06/11/15
Good product by Jon Durkin

Goes on well took a long time to dry but then again it has been cold. Put on cedar and it's brought the colour out beautifully.

Reviewed 750ml, Clear - 420 Extra on: 03/11/15
Took a very long time to dry by Tim Walls

Took forever to dry after the first coat - still not completely dry after a week even though it had been brought indoors and only had a thin coat applied. Second coat much better

Reviewed 750ml, Oak - 425 Extra on: 28/10/15
A note from us...

Hello Tim,

Very thin application of this product is vital, it can almost seem like you are removing the product when working in or wiping away excess, but thin application soaking into the wood should dry within 24 hours.

Another factor that could have prolonged it, is the temperature or moisture in the air. Cooler temperatures at this time of year can slow down the drying process.

Kind Regards Sam.

Does what it says on the tin by Amanda Goddard

Easy and pleasant to use. Used it two years ago on brand new pine window frames. Most windows are still looking good. The most exposed now need redoing but they have been through one of the wettest winters in memory. Probably we should have used some sort of base coat or sealant - check the website for this, as it doesn't tell you this on the tin.

Reviewed 750ml, Clear - 420 Extra on: 27/10/15
Used it before Brilliant by Alan Jackson

This product was recommended to me by my niece's husband who is a time-served carpenter. It's great.

Reviewed 2.5L, Clear - 420 Extra on: 27/10/15

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