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CD50X Extreme Timber Protection Oil Clear - 10L

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CD50 Extreme is the timber protection of choice when it comes to the most extreme situations.

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Product overview

Product overview

CD50 Extreme is the timber protection of choice when it comes to the most extreme situations. From locations in harsh environments (coastal, high humidity, dampness), to building products that are pretty extreme themselves (logs, thick posts or beams). Because CD50 penetrates deep into timber, it can get in to protect the thickest of timbers. CD50 Extreme is specifically formulated for just these jobs.

If you want to minimise warping, cupping, checking and splitting, and help control mould and fungus - reach for CD50 Extreme. It will add years of life to your timber and means less time and money spent maintaining your timber.

• Does not form a film, preventing peeling and flaking while making maintenance easy
• Controls and prevents the growth of mould, fungus and rot
• Enhances grain and character of timber
• Product of choice for decking, thick timbers and timber in extreme conditions
• Easy maintenance, just wash & re-apply with no sanding
• Perfect for humid or damp conditions

These figures represent typical averages for common cladding timbers: Cedar, Pine,
Douglas Fir, Macrocarpa etc:

• New dressed timber: 12-15 m² per litre
• New rusticated or bandsawn timber: 7-9 m² per litre
• Old restored dressed timber: 7-9 m² per litre
• Old restored rusticated or bandsawn timber: 4-7 m² per litre
• Shingles and shakes: 2-5 m² per litre
• Hardwoods: 12-15 m² per litre

Colour: Clear
Size: 10L
Weight: 10kg

View technical data sheet

View information sheet

Can we help?

Our friendly and knowledgeable gurus are trained to answer all your questions as quickly as possible. So if there’s anything you need to know just give us a call during business hours, or send us an email any time.

0800 800 880
Customer questions

Questions and answers

0 votes
q: Would this product be suitable to use on the outside of a boat on the timber edges or fender boards?
a: No its not designed for marine use - you need to look at specific teak oils or marine varnish.
By Trade Tested on December 2, 2020
0 votes
q: Hi, we have 2 large dogs, will this scratch off easily? Other deck stains we tried scratch and flake off from dogs walking on it and also get dirty easily, will this stay put and clean? Thanks
a: No this will be fine.
By Trade Tested on December 2, 2020
1 vote
q: I have a deck that we built about 3-4 years ago - it has weathered a little which is what we wanted - we now want to add a protection layer to it to help preserve it and to keep the mould off - I have cleaned it well with water and a scrubbing brush and want to have a clear coating that keeps the wood natural - its a pine deck - we have ferns growing around one side of the deck and want a product that wont affect them - (we can pop the leaves up during application) would this product be ok?
a: Yes this will be great, you might want to consider a soft chemical wash first, but it's not essential. If you look in the product description you can see some technical information links that you can download - this includes the application process.
By Trade Tested on May 11, 2020
-1 votes
q: Can I use this on Vitex decking?
a: Yes you can.
By Trade Tested on May 5, 2020
Customer reviews

Customer reviews

Overall rating

5 out of 5 stars from 17 reviews
Bob J Kaitaia

Love it!

1 day ago


Quality deck oil looks great, and should outlast cheaper alternatives by far, and with a minimum of work. Just what I wanted!

Nina Auckland

Awesome product

5 days ago


So easy to use and goes a long way. Our deck looks amazing. Will definitely use again!

PB Auckland

Easy to apply

27 days ago


Found the product easy to apply with good coverage. Will use again

Linz Auckland

Good quality

about 1 month ago


Great product, goes on easy

Bob Jenkins Kaitaia

Best treatment for exterior timber

about 1 month ago


Great product, best thing for wooden decks. No cracking or peeling, just was and declare, or let it silver off knowing that the timber is protected under the surface.

Sounds Captain Marlborough sounds

J. Fisher

2 months ago


I found the product way better than other brands I've tried. Its easy to apply it doesn’t try and alter the colour, easy clean-up, and if it does what they say. It will protect my expensive deck and make it last much longer.

Bay leaf St Heliers

Worth the effort

3 months ago


Recommended by our timber hot tub provider and had brought the tub back to tidy and was easy to use.

Cinna Southland

Great product!

4 months ago


This oil brought my sun-bleached decking up to a beautiful standard, l used a lot more than l thought l would have. 12 litres on a 2.6 x 24 mtr deck, however it was well soaked in and the rain did not penetrate it at all. The deck looks better than when it was first put down. I used a sheep skin deck mop and very pleased with the fantastic results.

Carl Motion Putaruru

CD50X Extreme clear oil

5 months ago


Great product, the clear oil gives the redwood a perfect wet look that shows up more of the natural grains and colour.

Gary Wellington


10 months ago


I used this product on an unpainted macrocarpa outside building that had been left to weather for several years and this product was amazing very easy to apply and looks like new. I only applied one coat.

Dave Cable Bay Northland


11 months ago


Good product for my coastal environment.

Gaza Te Horo


11 months ago


Great product very easy to apply and made our frontage which was old marcrocarper look like new

Wendlewulf Waikato

Goes down well

11 months ago


A bit pongey and needs a well ventilated environment but gives a good finish.

Edi Reikorangi

An absolute must to treat your wood/deck and more

about 1 year ago


Excellent product, easy to deal with, very good coverage, i used it on my various wooden decks and fencing, tried on wooden furniture too with stunning results. In addition TradeTested provided swift order processing and delivery. Highly recommendable product and supplier.

BrianW Auckland

Vitex Deck

about 1 year ago


I built my deck from Vitex 3 years ago but then finished it with with an acrylic decking “oil” which turned out be completely the wrong thing to do. The product didn’t wear well at all and within 6 months it looked terrible, so I decided to sand it back completely and start again. This time I did my research and went with CD50X. What a difference! Now the deck looks stunning and can stand moving furniture around without scrape marks and scratches, I am so pleased, should have done this in the first place.

Cozza Auckland


over 2 years ago


Excellent product - great looking on Vitex and easy to apply. Water on the surface of the deck indicates excellent protection from water penetration.

Kam Auckland

CD50X Extreme Timber Protection Oil- 4L

over 3 years ago


Best product you ever buy.

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