Osmo WR Base Coat 4001

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TOTAL £17.16
TOTAL:£10.71 - £53.66Incl. VAT
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Osmo WR Base Coat is a clear exterior wood preservative designed to enhance protection of softwood species. 

This is a base coat - please over-coat with an Osmo Exterior Finishing Oil, such as  Osmo UV Protection Oil or Osmo Natural Oil Wood Stain

For a deep coloured finish, we recommend a paint-like oil such as Osmo Country Colour.

Ideal For

Most exterior wooden surfaces. Including:

  • Windows
  • Frames
  • Roller Shutters
  • Doors
  • Pergolas
  • Trellis 
  • Garden Furniture
  • Timber Cladding


  • New improved formula
  • Greatly extends the life of softwoods and pines, such as spruce, fir and hemlock
  • Reduces wood swelling and shrinkage - oil penetrates deeply into the wood
  • No sanding necessary for future applications
  • Dries to clear finish
  • Very faint odour - odourless when dry

Technical Information

Brand Osmo
Coverage Up to 5-6m² per litre
Application Osmo Soft Tip Brush
Drying Time 12 hours
Coats 1 coat
Cleanup With Osmo Brush Cleaner
Storage 5 years if can kept dry and firmly shut. Store for 24–36 hours at room temperature before use
VOC 400g/l
Ingredients Based on natural plant oils (sunflower oil, soya oil, thistle oil and linseed oil), siccatives (drying agents) and additives, biocidal active ingredient: Propiconazole. Dearomatized white spirit (benzene-free).

Useful Documents

Product Information
Safety Data Sheet


Wood surface must be clean, dry and frost-free (moisture content max. 20%).

Ready to use oil. Do not thin. Stir well before use.

If you can, please apply the first coat to all sides before installation.

Clean old microporous stains thoroughly, and remove old paints and lacquers.

We recommend wearing a dust mask during sanding.

Please conduct a trial application. The finished surface can be influenced by the condition of the wood.


Apply by brushing, dipping or flooding.

For brush applications we recommend using Osmo Soft Tip Brush.

Only spray in an enclosed unit.

Coat generously.

Apply to all sides of the timber before fitting.

Before applying a protective oil coat on top, allow the WR Base Coat to dry for 12 hours at temperatures of 20 deg C / 65 % humidity. Lower temperatures and/or higher air humidity increases the drying time. 


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