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  • 01239 777009
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Treatex - Exterior Wood Oils


£2.00 - £73.25

Prices Include VAT

£2.00 - £73.25

Prices Include VAT

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Treatex Exterior Oils are manufactured on a base of natural sustainable raw materials including Sunflower oil, Soy-bean oil, natural waxes and are free of toxic substances. Treatex Exterior Oils are the ideal new or renovation finish for decking, cladding, doors, windows, garden structures and other exterior joinery.

Treatex Exterior Oils penetrate deeply into timber surfaces and in a similar way to bark, attach to the wood capillaries providing protection against extreme climate conditions through a highly water repellent, weather and UV resistant surface* that can prevent the formation of cracks and swelling in the surface after treatment.

We strongly recommend a trial application prior to starting the project. Our handy 50ml samples are perfect to test application and finish.

* Note: ‘Clear’ is not a UV protective finish and timbers treated only with Clear will break down and bleach in sunlight much quicker than any of the other options in the range. Clear should only be used to overcoat one of the colour options in the Exterior Oils range (for example when two coats of a coloured finish would be too dark/colour intense for your requirements). For a near clear finish with UV protection, please use ‘Sheer’ or for the best protection, use one of the more pigmented options.


  • Easy to apply
  • UV resistant
  • Highly water resistant
  • Contains no biocides or preservatives
  • Safe for use on children's toys
  • Can be used with Treatex Anti Slip Decking Oil
  • "Clear" contains no UV inhibitors.
  • "Sheer" is a lightly tinted clear finish with UV inhibitors
  • Exterior Oil colours can be overcoated with Exterior Oils Clear for extra wear protection


  • 1L will cover approximately 15m² in one coat depending on the timber and method of application.
  • 2.5L will cover approximately 37m² in one coat depending on the timber and method of application.

Note: Rough sawn timber can potentially increase consumption by a factor of 2 to 3.

Drying time: Allow approximately 12 hours between coats (see application below).


Finishes Available: Clear, Sheer, Albino, Champagne, Dun, Buckskin, Spanish Chestnut, Copper Bay, Bay, Seal Brown, Blue Roan, Steel Grey, Smokey Black and Belgian Black.

Suitable for: External use

Recommended timbers: Suitable for use on most species of timber

Applications: Decking, cladding, windows, garden structures and other exterior joinery


Treatex Exterior Oils work best on unfinished timbers. Exotic and pressure treated timbers should be allowed to weather for approximately 3 months before finishing.

Previous finishes which stop Exterior Oils penetrating into the timbers (e.g. paints and other ‘closed’ finishes) must be fully removed prior to application. Previous porous finishes should be lightly sanded before over coating. When over coating a previously finished surface, a trial application is essential. Flaking or peeling finishes must be fully removed prior to application.

Ensure the timber is dry and free from possible contaminants e.g. algae, grease, dirt, dust etc.

Timbers susceptible to mould and fungi should be treated first with a suitable preservative.

We advise that when using Exterior Oils, sufficient product is purchased to complete the whole project and when more than one tin is required it is advisable to mix them together before use.

The timber must have a moisture content below 18% and the ambient temperature must be greater than 8oC/<60% humidity during application and drying.

How to apply Treatex Exterior Oils

  • Stir tins thoroughly, before and during use.
  • Use a brush, roller or spray to evenly apply Treatex Exterior Oils in the same direction as the wood grain, allowing approximately 60-70ml per m2.
  • Pay particular attention to the end grain, where you should apply liberally.
  • After approximately 12 hours the first coat can be overcoated.
  • Apply with a brush or roller a second coat of Exterior Oils, again allowing roughly 60-70ml per m2.
  • After the second coat leave for approximately 12 hours to dry.
  • A third coat can be applied if necessary.
  • Finishing with Exterior Oils Clear will add further protection against wear and abrasion.
  • For decking, we recommend applying Treatex Anti-slip Decking Oil.

How to apply Treatex Exterior Oils

How to apply  Treatex Exterior Oils on Decking

Insider Tips:

  • Treatex brushes available here!
  • Wet brushes and rollers can be cleaned with Treatex Thinner.
  • Store tins in a cool and frost free environment. Unopened tins will last for FIVE YEARS! Once tins are opened, transfer contents to a smaller airtight container.



Please note, images are for guidance only. Different computer screens and printers can greatly influence the perceived colour. 
Samples are available and we recommend testing before final application.