Ronseal Ultimate Protection Decking Oil 5L

  4.9/5.0   400 reviews
You'll need enter area above for 2 coats (Recommended)

Wood type and application 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 Ronseal Total 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. Clean old decking oil finishes thoroughly with Ronseal High Performance Decking Cleaner Sachets
  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.

400 customer reviews
by Keith Strachan

Easy to apply, though appeared watery during application. Dried quickly and covered well. As water based, easy to clean brushes. Time will tell with regards durability over standard oil based protection!

Reviewed Natural on: 17/07/17

Easy to apply

Reviewed Natural Oak on: 14/07/17
Does what it says by John Connell

Easy to apply. Hope it does last longer than 'non-ultimate' but time will tell

Reviewed Natural Pine on: 14/07/17
Easy to purchase, quick delivery by Chris Simpson

Easy to mess .brush and roller easy to clean in cold water

Reviewed Natural on: 13/07/17

Does what it says on the tin

Reviewed Natural Cedar on: 12/07/17
Super quick delivery, great price too by Steve Aldridge

Used on new decking boards. Needs two coats but looks great.

Reviewed Natural on: 12/07/17
Tried other makes but you get what you pay for by Brian McFarland

Ronseal is what I used in the past tried others but went back to Ronseal the others did not last

Reviewed Dark Oak on: 11/07/17

Great price and quick delivery

Reviewed Natural Pine on: 11/07/17
Great cover,loved the colour! by Dorothy Barnett

I previously purchased this product from another store,at more than double the price!

Reviewed Natural Oak on: 11/07/17

Excellent, so easy to apply.

Reviewed Natural Cedar on: 10/07/17
Fantastic value by Mark Fox

Really good stuff. 2 coats needed as it says on the tin.Decking and fencing have come out lovely. Very happy

Reviewed Natural on: 09/07/17

Excellent service very fast delivery would certainly use this seller again

Reviewed Natural Pine on: 09/07/17
As described by Mr Amin Keshavji

As described better than stains or decking paint which just peels of annually

Reviewed Dark Oak on: 09/07/17
Easy to use and served its purpose by Joyce Matthews

The Ronseal Ultimate Protection Decking Oil was easy to apply, gave a nice even finish and has made my decking look lovely.

Reviewed Teak on: 09/07/17
Premium product with a great finish by Ben Rye

After spending hours removing years of cheap deck paints and stains I went for the Ronseal Ultimate Oil based on research on the net. It applied well to my freshly stripped deck and has left a new looking feel to 10 year old wood.

Reviewed Teak on: 08/07/17
It does what it says on the tin by JJ

My decking has never looked so good.Really pleased with the results.

Reviewed Natural on: 06/07/17
Made a noticeable difference to my deck by Chris Jackson

I'm still putting on the first coat but am loving the effect of natural wood

Reviewed Natural on: 05/07/17

Very water repellent and a warm colour.

Reviewed Natural Cedar on: 04/07/17

not used it yet. but used it previously.

Reviewed Natural Oak on: 04/07/17
Far to early to tell if it has worked, come back in a couple of years by Mr S Ross

Far to early to tell if it has worked, come back in a couple of years

Reviewed Natural on: 03/07/17