Osmo 420 Clear Uv Protection Oil Extra

Your price

Estimated dispatch 15/12/2023

Osmo 420 UV Protection Oil provides exterior woodwork with a professional, natural, oil-based and microporous UV protective finish. Great for all exterior vertically structured wood projects including cladding, windows, doors, and fencing. Contains Biocides to protect against algae, mildew and fungal decay.

  • Highly water and dirt resistant
  • Contains active ingredients to protect the coating against mould, algae and fungal attack
  • Clear and transparent colours available
  • Microporous, penetrating finish which does not crack, peel or flake
  • No sanding necessary when topping up coating
  • Delays natural greying by 12 times in comparison to untreated wood
  • Looking for a biocide-free finish? View OSMO 410 UV Protection Oil

Uses: External, Cladding

Customer Reviews

5 Reviews

Excellent protective coating

by 6alltmawr (02/19/2021)

Good stuff. Takes quite a long time to dry. Brings out the natural grain well

Not used as yet !!

by Carolyn141153 (06/16/2020)

I haven’t got as far as the top coat but if the base coat is anything to go by, it’ll look even better

Five stars

by M.tufnell (04/28/2020)

Great product and great service. Thank you.

Good product / good customer service

by Mhgalea (04/24/2020)

I have used this product year on year. Applied sparingly it enhances the natural patina of the wood without leaving a varnished gel or look. Nice to work with. A little goes a long way

Great product

by Jonstonc (04/22/2020)

A bit pricey but easy to apply and does a great job

Delivery Information

  • Express delivery on all orders once machined.
  • Click & Collect is available from our Falmouth store.
  • All orders are expertly packed to ensure against damages.
  • Delivery costs will be automatically calculated using the weight, size and delivery location of your order so delivery rates will vary. 

Palletised Delivery Information

  • Due to the size and weight of goods, some items will be sent via a roadside palletised delivery.
  • We will contact you prior to dispatch to arrange a convenient weekday delivery.
  • If a large curtain-sided lorry (the size of a double-decker bus) is unable to access/vacate your premises or pull-up outside the property (restricted access) your pallet may be sent on a ‘Book-In’ service, which means your local depot will contact you and arrange a date and suitable delivery transport with you. Your local delivery depot will call the next working day after dispatch to book the delivery with you for delivery within 5 working days.
  • If a large curtain-sided lorry (the size of a double-decker bus) is able to access your premises and pull up outside the property, your pallet can be delivered on the next weekday suitable for you. Please let us know by 11:00 am the day before, so that we can dispatch in time. 
  • Please be aware, if a forklift is unavailable at the delivery address (e.g. a residential address) people will be required to unload from the pallet by hand. This is for the health and safety of the delivery driver.

  • We use a third-party courier service who have a strict policy on abuse or harassment towards their drivers. In any case where there is abuse or harassment, the driver is within their rights to refuse delivery.

  • It is your responsibility to dispose of all packaging and pallets, this is for the health and safety of the delivery driver.

Please download Pallettrack's Home Delivery guide for more information on their roadside delivery service.



  • If you wish to arrange a collection with a courier of your choice then we are more than happy to package the goods for you. Please email us your full cutting list for specific prices and estimated weight and dimensions.
  • Contactless collection is an option for any order. Our collections take place at our workshop in Falmouth, Cornwall between the hours of 9 am-4 pm any weekday excluding bank holidays.
  • We will contact you once the goods are ready to collect, so a convenient timeslot can be arranged. 

Returns should be sent to the following address:

Sprucewool Ltd 
Bickland Business Centre
Tregoniggie Industrial Estate
Bickland Water Road
TR11 4SN

Please see our full returns policy in our terms of supply document (Clause 9)