Osmo UV Protection Oil Extra

  4.8/5.0 (514 reviews)
Recommended
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On-screen colours may vary according to different screen calibrations. We therefore always recommend applying a test area.
2 coats = Recommended
Total: enter area

Wood type and application method can vary coverage.

  • A professional grade oil-based protective wood finish for exterior wood
  • Suitable for all vertical exterior wood surfaces including doors, windows, window shutters
  • Contains UV filters to protect wood against greying and silvering over time
  • Offers superb durability against weathering
  • Reduces swelling and shrinkage of the timber
  • Contains biocides to protect against mould, algae and fungal attack
  • Does not crack, flake, peel or blister
  • Easily maintained and renovated
  • Formulated from a blend of natural vegetable oils and waxes
  • Low V.O.C
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.

Please Note: Osmo UV-Protection-Oil Extra (Natural 429) has been specifically designed to retain the natural, untreated appearance of lighter timbers such as Oak, Pine and Larch. It is not suitable for dark exotic hardwoods as it may leave a 'milky' or 'white film' appearance to the wood.

The clear version of this product (Clear 420 Extra) can be used as a top coat for Osmo exterior coloured finishes such as Osmo One Coat Only HS Plus, Osmo Natural Oil Woodstain and Osmo Country Colour.

Ensure that wood surfaces to be treated are clean, dry and frost-free (moisture content max. 20%).

New Wood

  1. Surfaces should be sanded with a 120 grit abrasive and no finer
  2. New wood and especially hardwoods should be allowed to weather for approximately 6 weeks prior to oiling
  3. De-grease surfaces with methylated spirit or Osmo Brush Cleaner and Thinner (8000) before oiling
  4. Treat the wood with an exterior wood preservative for additional protection if desired

Please note: Allowing the wood to weather, especially dense exotic hardwoods, enables the tight, dense grain of the timber to open up. This makes it easier to apply the oil and allows it to penetrate deeper in to the wood grain.

Old Wood

  1. Clean old microporous finishes (wood oils) thoroughly
  2. Areas affected by mould, algae and moss must be cleaned and treated
  3. Surfaces should be lightly sanded with a 120 grit abrasive and no finer
  4. Old paints, lacquers and varnish like stains must be completely removed
  5. The colour of timber that has turned grey / silver over time can be restored prior to oiling with Osmo Wood Reviver Gel (6609)
  6. Treat the wood with an exterior wood preservative for additional protection if desired

Always do a test area before starting any project to check suitability and compatibility. Follow the manufacturer's instructions on the tin at all times.

  1. Stir thoroughly before and periodically during application
  2. Where possible treat all sides of the timber prior to installation
  3. Apply thinly along the wood grain with a natural bristle brush
  4. Work the oil in to the surface of the wood grain
  5. Wipe of any excess with a clean, lint free cloth
  6. Allow to fully dry
  7. Apply a second coat as above

Please Note: Osmo UV-Protection-Oil Extra (Natural 429) has been specifically designed to retain the natural, untreated appearance of lighter timbers such as Oak, Pine and Larch. It is not suitable for dark exotic hardwoods as it may leave a 'milky' or 'white film' appearance to the wood.

Renovation

When renovation is required, ensure that surfaces are clean and dry. Lightly sand or use a stiff brush to remove surface dirt and debris. Apply a thin maintenance coat taking care to work the oil in to the surface of the wood and wiping off any excess.

For wood that has become discoloured or is showing signs of mould, algae or moss, refer to the preparation and application sections above.

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. This said however, we have customers that have used Osmo UV Protection Oil with success on these woods.

Wiping the timber down with methylated spirit prior to applying the oil can aid penetration with these wood types. Other things that can help include allowing the wood to weather for 6 weeks and ensuring that the oil is at a good room temperature which keeps it thinner. Cold temperatures thicken the oil making application more difficult.

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

A. Osmo says that this product is not 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.

514 customer reviews
4.8/5.0
 
Spot on by Mr Richard Mason
Reviewed 125ml, Clear - 420 Extra on: 12/01/17
Easy to put on - leaves the woods natural look intact ! by Mr Neil Caunce

Goes on real easy - foam roller to apply - went into wood reasonably deep - should give plenty of protection for years to come !

Reviewed 750ml, Clear - 420 Extra on: 11/01/17
Very effective as long as the wood is dry by Mr Welby

wonderful preservative of all woods but especially effective on oak I was advised by my oak supplier and has certainly worked well on Oak and Sapele. Highly recommended.

Reviewed 2.5L, Clear - 420 Extra on: 10/01/17
Garden chairs look new again Product easy go apply, covers well by John Burman
Reviewed 125ml, Clear - 420 Extra on: 10/01/17
The Product is the nearest to a sustainable finish I have found for timber finishing Easy to apply and maintains appearance for an extended period by Andrew Clark RIBA.

This is a product I can recommend, after using the Sikkens system of finishes for 30 years, a move to this product is seen as a further step in the search for sustainable naturally based products which not only look good but perform to the quality of finish required.

Reviewed 2.5L, Clear - 420 Extra on: 04/01/17
Quality product by Jonathan Sloan

Easy to use and maintain. Use this on all our exterior products.

Reviewed 750ml, Clear - 420 Extra on: 29/12/16
Quality product by Jonathan Sloan

Easy to use and re coat when required. Leaves a great colour.

Reviewed 750ml, Cedar - 428 Extra on: 29/12/16
Excellent by Neil Kennedy

A first rate product, application is easy, finish excellent. Don't think twice - just go for it!

Reviewed 2.5L, Clear - 420 Extra on: 20/12/16
Product is easy to use and looks very good by Anne Czerniawski

This product lives up to its hype, the only thing which threw me was the 12 hour drying time quoted on the tin. We had no choice but to use the product in cold damp weather as we needed to protect very expensive specially made external oak doors. The drying time varied between 10-12 days for the ones facing north to 3-4 days for the only south facing one. A warning on the tin might be helpful .

Reviewed 2.5L, Clear - 420 Extra on: 06/12/16
Excellent delivery by Mohan Mundasad

good product

Reviewed 2.5L, Oak - 425 Extra on: 04/12/16
Excellent finish and very easy to use on new and old wood by Mr Chris Blundell

Excellent finish and very easy to use on new and old wood

Reviewed 2.5L, Oak - 425 Extra on: 04/12/16
Lived up to expectations by Mr R W Marsden

covered well and looks really good when applied and dry.

Reviewed 750ml, Cedar - 428 Extra on: 04/12/16
Fantastic finish for my oak frame lounge by Adam Bancroft

This product was recommended by wood finishes direct. It is a brilliant product and I would thoroughly recommend it.

Reviewed 2.5L, Clear - 420 Extra on: 26/11/16
Ver good by Jane Davis

Very good. Easy to apply.

Reviewed 2.5L, Oak - 425 Extra on: 25/11/16
Good quality product by Roger Bellamy

Whilst good to apply and brings out the natural sheen of the wood, it's a bit early to judge the 10-year durability!

Reviewed 2.5L, Natural - 429 Extra on: 22/11/16
Excellent - though I guess time will tell! by Peter Ireland

This is as good to use and gives as good an initial finish as I am used to from Osmo products. Brings out the character of the wood beautifully. It will need several years before I can really tell how its UV protection performs - I just assume Osmo have done their testing.

Reviewed 750ml, Clear - 420 Extra on: 19/11/16
Great product which was easy to apply and enhance the wood by Dave Berry

Really easy to apply and goes a long way. It enhanced the timber cladding, the client was extremely pleased with the end result.

Reviewed 2.5L, Natural - 429 Extra on: 17/11/16
Easy to use by Moira Gedge

Worked well

Reviewed 750ml, Clear - 420 Extra on: 10/11/16
Good for outdoor decking by Francis Reed

This certainly has spruced up the appearance of our outside decking. It remains to be seen how long it will be, before another rating is needed.

Reviewed 750ml, Clear - 420 Extra on: 06/11/16
Does what it says on the tin by Catherine Newton

This is an excellent product would not use anything else after seeing the results.

Reviewed 750ml, Oak - 425 Extra on: 04/11/16