Shopping Cart
You have no items in your shopping cart.

Osmo WR Base Coat 4001

Clear base coat with algae protection
Manufacturer: Osmo

The special preventive wood impregnation against moisture!

Ideal as extra protection for softwood species for the exterior. A clear wood impregnation which serves as a preventive protection against blue stain, rot and insect attack. Penetrates deeply into the wood - prevents swelling and shrinkage and is extremely water repellent with a very low odour during application and is completely odourless when dry.

  • Clear base coat, for exterior use
  • Especially recommended for wood not in contact with the ground, windows, cladding, garden furniture
  • Extremely water-repellent, reduces swelling and shrinkage
  • Resistant to blue stain, rot and insect attack
  • Ideal primer for oil-based finishes (such as One Coat Only, UV-Protection Oil and Country Colour)
  • vailable in 0.75 and 2.5 litre drums
  • Approx. coverage: 5-6m²/L with one coat


  • WR Base Coat is not a wood finish and is a base coat only. A finishing product from the Osmo range is required within three months.
  • If possible, although not essential; apply to all sides of the wood to give the strongest protection. Wipe excess from edges with a dry cloth before leaving to dry.
  • Some applications may raise the wood's grain, if neccessary de-nib to smoothen the surface.
  • Note: 4005 WR Base Coat Aqua is discontinued from 2016 and is superceded with an improved oil-based version 4001 WR Base Coat.

*Use biocides safely! Always read the label and product information before use.


0.75 Litres

PRICE BREAKS - The more you buy, the more you save.
1 +
2 +
SKU: OS/WR/4001
2.5 Litres

PRICE BREAKS - The more you buy, the more you save.
1 +
3 +
SKU: Os/4001/2.5
Coverage 5 to 6 sqm / Litre
Application Exterior
Coats Required 1
Customers Who Bought This Item Also Bought
Picture of Osmo UV-Protection Oil Clear Extra 420 Clear for your outdoor vertical surfaces with algae protection
From £21.08
Picture of OSMO Sample Sachets 5ml Interior Available in Osmo Polyx Oil Original; Osmo Polyx Tints & Osmo Wood Wax Finish Transparent
From £1.30
Picture of Osmo Polyx Oil Original Hardwax Oil Clear, matt (3062); Satin(3032) or clear, semi-matt (3065), for interior use
From £9.11
Picture of WOCA Lint Free Oiling Cloth WOCA Lint Free Oiling cloths. Each Cloth is approx 550mm x 500mm