Ronseal Ultimate Protection Decking Oil

  4.8/5.0 (247 reviews)
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 tinted, water-based decking oil suitable for bare, pressure treated or preserved decking
  • Perfect for all smooth and grooved, softwood and hardwood decking
  • Offers up to twice the resistance as standard decking oils
  • Excellent water repellency, rainproof in just 90 minutes
  • Penetrates deep into the wood to provide a long lasting finish
  • Replaces natural oils lost through weathering
  • Nourishes the timber to help prevent cracking, splitting and warping
  • Available in a range of natural wood tone colours
  • Low V.O.C
Brand Ronseal
No. of coats 2
Coverage Up to 9 per litre
Drying time 24 hrs
Size 5L
MPN 38524, 38526, 38525, 37300, 38528, 38527
GTIN 5010214872978, 5010214872992, 5010214872985, 5010214873005, 5010214872954, 5010214872961

In order to satisfy all orders you may receive a different style tin to the one displayed (one includes a banner "4L + 25% FREE", the other looks like a standard tin. Rest assured, they are the same product, and the price shown is the promotional price (4L + 25% FREE).

Ronseal Ultimate Protection Decking Oil will leave decking protected and looking great for longer with a natural or tinted colour finish.

  • Have grooved decking? You'll normally need double the quantity. Our handy coverage calculator will help you choose the right amount

Decked areas to be treated should be clean, dry and free from traces of dust, dirt, oil, grease, wax and silicone.

New Decking Preparation

For all bare wood decking including tantalised, pressure treated and preservative impregnated decking timbers.

New softwood decking

  1. Treat with a suitable exterior wood preservative for the best protection
  2. If possible, preserve all sides including end grain prior to installation
  3. Sweep the decking with a stiff broom to remove all traces of surface dirt and debris
  4. Use a suitable decking cleaner if required before oiling

New hardwood decking

Hardwood decking usually requires a period of weathering to allow the surface grain to open up. This allows for better absorption of the decking oil. Check the decking manufacturer's guidance on how long decking should be left to weather before treating.

Old Decking Preparation

Old coating type finishes such as decking paints, varnishes and varnish type stains must be fully removed back to bare wood before oiling. Depending on the condition and type of finish, it may require more than one attempt to fully remove the old coating.

  1. Ensure that all 'coating' type finishes have been fully removed to expose bare wood by either jet washing or using a dedicated decking stripper and remover
  2. Old oiled finishes should be cleaned thoroughly with a suitable decking cleaner
  3. For decking affected by mould, algae or moss, or to restore the colour of decking that has turned grey or silver over time, use a decking restorer or reviver gel
  4. For the best protection, treat with a suitable exterior wood preservative
  5. If possible, preserve all sides including end grain prior to installation
  6. Sweep the decking with a stiff broom to remove all traces of surface dirt and debris before oiling

Always do a small test area before starting any project and follow the manufacturer's instructions on the tin at all times. Do not apply in damp conditions, when rain is likely, or when are temperatures below 10℃.

  1. Shake the tin thoroughly before pouring the entire contents into a suitable metal or plastic container; if using more than one tin mix them together (Do not thin or dilute)
  2. Apply liberally to ensure that even penetration and complete coverage of the decking is achieved
  3. Treat 3-4 decking boards at a time to avoid overlap marks
  4. Redistribute any excess oil along the decking boards or wipe off with a clean cloth
  5. Allow 4 hours drying time between coats
  6. Apply an even second coat as above

Regular Cleaning

To preserve the oiled finish for longer, we recommend that wooden decking is swept with a stiff broom on a regular basis to remove loose leaves, dirt and other organic matter. This prevents a build up of organic matter that can settle on the deck and in the grooves, which can degrade and damage the finish and decking timbers over time.

Deep Cleaning

For deep cleaning, use Ronseal Decking & Garden Cleaner.


Inspect the finish on an annual basis and apply a fresh coat of oil as and when required.


Stubborn marks and stains may require a light sanding before re-applying a thin coat of Ronseal Ultimate Protection Decking Oil to the affected area.

247 customer reviews
Excellent coverage by Susan Tompkins

We bought this as advised and the colour was perfect lighter than described The quality of the decking oil was excellent and went on smoothly with good coverage

Reviewed Dark Oak on: 21/05/17
Easy to apply by Mick Waters

Good easy to use stain.. simply cut in with a brush and use a roller and pole to do the rest. Looks great after 2coats.

Reviewed Dark Oak on: 21/05/17
Brilliant price and really fast delivery would highly recommend this product and sellar by Kelly. Eros Coffee Shop. Murdoch

Great product goes on no problems and dries super quick.. And really great finished look

Reviewed Dark Oak on: 20/05/17
Great to use by Sue Norman

Looks lovely and wood looks so nice

Reviewed Natural on: 20/05/17
Does what it say's on the tin by Andy Swinfield
Reviewed Natural Cedar on: 20/05/17
Excellent product by Brian Rowlands

Bought this to protect my decking which has just endured its first Scottish winter. Applied to coats of natural wood preserver before applying two coats of Natural Ulimate protection decking oil. Brought out the natural grain of the wood and has given it an excellent protection coat against rain which now beads and roles off the decking. Excellent product well priced with good coverage and first class finish

Reviewed Natural on: 19/05/17
Excellent product and excellent service by Mr Brian Morris

Easy to use, quick drying-it does what it says on the tin!

Reviewed Natural Cedar on: 18/05/17
Does what it says by Mark Walker
Reviewed Natural Oak on: 17/05/17
Easy to use , great finish on my decking by Terri Rawding
Reviewed Natural on: 17/05/17
Great results easy application by A Hodgson

Great product and if you spend a little preparation time even old decking looks fantastic after two coats. Its easy to apply with great coverage and short drying time between coats and hard enough to walk on and use patio furniture on within 24 hours.

Reviewed Natural Cedar on: 16/05/17
Does what it says on the can by Clive Stirland

Good product covers well nice colour.

Reviewed Natural Cedar on: 16/05/17
Does exactly what it says on the tin by Andrew Roughley

Really good great coverage I would definitely buy again

Reviewed Natural Pine on: 16/05/17
Great product by Ken Oldbury

Not a problem great seller very easy transaction will buy again from them ta

Reviewed Natural on: 16/05/17
Ronseal, it does by Debbie Jennings

Went on easily, dried quickly, the rain just rests in droplets on the wood. Does exactly what it says on the tin. Excellent service from Wood Finishes, too.

Reviewed Natural on: 16/05/17
First time used it but will do so again by Rod Hattan

Excellent, good coverage and easy to apply

Reviewed Teak on: 14/05/17
Poor coverage by MB

The product has not given a smooth even coverage. Despite thoroughly cleaning beforehand with the same brand decking cleaner, this product has dried into multiple small spots.

Reviewed Natural Cedar on: 13/05/17
A note from us...


Thank you for taking the time to sent us some feedback. Is it possible that there is something on the wood preventing penetration of the oil and giving you that patchy finish. I would be happy to take a look if you are able to send some photos in. Our email is some of the whole decking and close ups of the effected areas.

Kind Regards Samantha.

Excellent product! by Steve Goodwin

This is an excellent product for decking protection and giving a very rich colour- Dark Oak.

Reviewed Dark Oak on: 13/05/17
Easy to use as always by Zena Deville

wont know if it last longer than the normal one till after a while hopefully as hate doing the decking every year

Reviewed Natural Oak on: 13/05/17
Excellent product, the deck looks better than new! by Ajay Sinha
Reviewed Natural on: 13/05/17
Great product easy to use by Darren Thwaites
Reviewed Natural Oak on: 12/05/17