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Treatex UV Oil - External UV Protection



Prices Include VAT


Prices Include VAT

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Treatex UV Oil is a next generation clear UV protective finish, which offers excellent protection against the bleaching effect of the sun's Ultra Violet rays. Penetrating deeply into timber surfaces, it attaches to the wood capillaries providing protection against extreme climate conditions.

Manufactured on a base of refined natural oils such as soybean and sunflower oil and waxes, Treatex UV Oil is designed for use on most vertical timbers and applications (excluding horizontal surfaces such as decking and walkways) and can be used over Treatex Exterior Oils and Classic Colour Collection. Treatex UV Oil is the ideal finish for cladding, doors, windows and other exterior joinery.

Available Sizes: 1 Litre, 2.5 Litres + 30ml sample

Key Features of Treatex UV Oil

  • UV resistant clear finish

  • Highly water resistant
  • Suitable for outdoor use
  • Direct replacement of External Oak Protection
  • Easy to apply
  • Suitable for most exterior timbers
  • Can be used over External Oak colours / Exterior Oils / Classic Colour Collection
  • Not suitable for use on horizontal surfaces


  • 1L will cover approximately 25m² in one coat depending on timber and method of application (rough sawn/planed may consume more).
  • 2.5L will cover approximately 50m² in one coat depending on timber and method of application (rough sawn/planed may consume more).

Drying time: approx. 3-6 hours dependent on climatic conditions, drying times can be decreased by increasing temperature and introducing air flow to the applied area.

Uses: Suitable for use on: Claddings, doors, windows, shingles and other exterior joinery - not suitable for decking or other walkways - horizontal timbers may wear sooner.  Compatible with most timbers - please check if unsure. Timbers with a high tannin content such as air dried Oak may still leach tannin in the early stages. 

Preparation: Treatex UV Oil works best on unfinished timbers. Previous finishes which stop UV Oil 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 to 120 grit 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.

We advise that when using Treatex UV Oil, 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 between 8oc and 25oc during application and drying. We strongly recommend a trial application prior to starting the project.


  • Stir tins thoroughly, before and during use.
  • Use a brush or roller to evenly apply Treatex UV Oil in the same direction as the wood grain. Pay particular attention to the end grain, where you should apply liberally.
  • If possible, coat all sides of the timber at least once.
  • After approximately 12 hours, the first coat can be overcoated.
  • Apply with a brush or roller a second coat of Treatex UV Oil, and leave for approximately 12-24 hours to fully dry.

Insider Tips: 

  • Treatex brushes and rollers are available. Wet brushes and rollers can be cleaned with Treatex Thinner or white spirit.
  • 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.
  • Treatex UV Oil can be used as a protective top coat of applications of Treatex Exterior Oils and Classic Colours.

Further Information:

Treatex UV Oil Safety Datasheet (SDS)


UV Oil is made from sustainable ingredients including plant oils. VOC levels are within emissions regulations for oil based products at 395g/l (VOC category limit is 400g/l)