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Treatex - Grey Cedar Oil



Prices Include VAT


Prices Include VAT

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Treatex Grey Cedar Oil is suitable for Cedar and Larch timbers on claddings, windows and doors. 

Treatex Grey Cedar Oil creates the greyed effect of aged Cedar, whilst still protecting and allowing the timber to mature. The grey colour can be maintained through future applications of Grey Cedar Oil or be left to mature naturally over time as required.

Treatex Grey Cedar Oil penetrates deeply into timber surfaces and in a similar way to bark, attaches to the wood capillaries providing protection against extreme climate conditions.

Manufactured on a base of sustainable raw materials which include sunflower oil, safflower oil and soybean oil, Treatex Grey Cedar Oil is the perfect choice for you and the environment.

Please be aware that Treatex Grey Cedar Oil is not suitable for tannin rich woods such as Oak. For timbers high in tannins, we recommend Treatex External Oak and Treatex External Oak Protection.


  • suitable for internal and external use
  • will not flake or peel
  • creates the naturally greyed effect of aged Cedar while still protecting the timber
  • contains no biocides or toxic ingredients
  • UV resistant
  • easy to apply with brush or roller
  • safe for use on children's toys. 


2.5L will cover approximately 35m² in one coat depending on timber and method of application.

Drying time: approx 12 hours


Suitable for: Internal and external use

Recommended timbers: Cedar and Larch

Applications: Cladding, windows and doors


  • Treatex Grey Cedar Oil works best on unfinished timber. Previous finishes which stop Grey Cedar Oil penetrating into the timber (e.g. paint and other ‘closed’ finishes) must be fully removed prior to application. Previous porous finishes should be lightly sanded before overcoating. When overcoating 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 decay, mould and fungi should be treated first with a suitable preservative.
  • Timber must have a moisture content below 18% and the ambient temperature must be between 8oC and 25oC whilst applying the oil and during drying. Moisture of the wood can be tested with a good wood moisture meter.
  • We recommend a test application before starting the project. 


  • Stir tins thoroughly, before and during use.
  • Use a brush or roller to evenly apply Treatex Grey Cedar Oil in the same direction as the wood grain.
  • Pay particular attention to end grain, on end grain apply liberally.
  • After approximately 12 hours the first coat can be overcoated with a second coat of Treatex Cedar Oil.
  • After the second coat leave for approximately 12 hours to dry.

Note: Treatex Grey Cedar Oil is not a surface building product.

Insider Tips

  • Wet brushes and rollers can be cleaned with Treatex Thinner or white spirit
  • Store tins in a cool and frost free place. Unopened tins will last for five years. Once tins are opened, transfer the contents to a smaller airtight container.

Further Information

Treatex Grey Cedar Oil Safety Datasheet (pdf)