Osmo WR Base Coat (4001) 2.5L

Osmo WR Base Coat (4001) 2.5L

£61.06 £53.73 SAVE 12%
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SKU: 1K-URNG-GLNH
 
       
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Product Description

Enhance Your Wood with Osmo WR Base Coat

The Osmo WR Base Coat is your go-to solution for enhancing and protecting your wooden surfaces. This high-quality base coat is specifically designed to offer exceptional durability and moisture resistance. Ideal for outdoor applications, it penetrates deeply into the wood fibers, creating a robust barrier against rain, UV rays, and temperature variations. With its easy application process, you can achieve a professional finish without the hassle. Whether you are restoring an old deck or finishing a new piece of furniture, this base coat is the perfect choice for ensuring longevity and maintaining the beauty of your wood.

Features of Osmo WR Base Coat

One of the standout features of the Osmo WR Base Coat is its water-repellent properties. This base coat forms a protective layer that resists moisture, preventing swelling and warping of the wood. Additionally, it allows the wood to breathe, ensuring that any trapped moisture within can escape, thus reducing the risk of mould and decay. Each litre covers a significant area, making it economical for larger projects while also providing a rich, clear finish that enhances the natural grain and color of the wood.

Application Instructions

Applying the Osmo WR Base Coat is straightforward, making it suitable for both beginners and seasoned DIYers. Start with clean and dry wood; it’s crucial to ensure that the surface is free from dust and old coatings. Using a brush or roller, apply the base coat evenly across the surface. For optimal results, a second coat may be required, especially on exposed surfaces. Allow the coat to dry completely before applying any topcoat or additional finishes to ensure a perfect bond and a stunning final look.

Why Choose Osmo Products?

Choosing Osmo products means choosing quality and sustainability. Osmo is committed to creating high-performance coatings that are not only effective but also environmentally friendly. The Osmo WR Base Coat is based on natural oils and waxes, making it safe for both users and the planet. This base coat is perfect for anyone who values performance and ecological responsibility in their woodworking projects, making it a reliable choice for interior and exterior applications alike.


Important Cast Iron
  • For our Cast Iron Products - Cast Iron will rust if exposed to moisture or high humidity. To remove surface rust use wire wool and lightly coat with a furniture wax or oil. You can also paint this product with a suitable metal paint. All cast iron products are supplied with a light oil or wax coating to prevent rusting in transit, this can be removed with a cloth or white spirit.
Screws & Fixings
  • Screws & Fixings - Where required our products are supplied with wood screws, you may require alternate fixings depending on your wall type. Always consult a professional tradesman if you are unsure.
More

Osmo WR Base Coat 4001 (2.5L) is a clear exterior wood primer that penetrates deeply to stabilise timber and repel water. Use it as the first coat on bare wood before finishing with an Osmo exterior topcoat. It is designed to help reduce swelling and shrinkage, improve dimensional stability and provide preventative protection against blue stain and wood-decay fungi. WR 4001 is not a final finish and must be over-coated.


Best for: softwood and hardwood joinery above ground—windows, frames, doors, cladding, fascias, pergolas, fences and garden buildings.

Key features

  • Clear, penetrating exterior primer for bare wood
  • Water-repellent; helps reduce swelling, shrinking and warping
  • Preventative protection against blue stain and rot (biocidal product – use safely; always read the label)
  • Microporous; allows timber to breathe for long-term stability
  • Improves adhesion and performance of Osmo topcoats
  • Size: 2.5 litres • Sheen: Clear/Invisible once over-coated

Recommended topcoats


Apply one of Osmo’s exterior finishes after WR 4001 has dried, such as Osmo Natural Oil WoodstainOsmo Country Colour (opaque), or Osmo UV-Protection Oil for vertical cladding and joinery. Choose a tinted topcoat for additional UV resistance.

Preparation & application

  1. Ensure wood is clean, dry and bare. Remove greyed or previously painted/varnished surfaces back to sound timber.
  2. Stir well. Do not thin.
  3. Apply one thin, even coat by brush or paint pad with the grain. Work end-grains thoroughly.
  4. Allow to dry fully as directed on the tin before applying your chosen Osmo topcoat(s).
  5. WR 4001 is not suitable for ground-contact timber or as a stand-alone finish.


Coverage and drying vary with species, porosity and conditions—always follow the instructions on the container.

Frequently asked questions


Is WR Base Coat 4001 clear?

Yes. It is a clear primer that leaves the wood looking natural and is intended to be over-coated.


Do I still need a finishing coat?

Yes. WR 4001 is a base/impregnation coat only. Finish with an appropriate Osmo exterior product for colour, UV resistance and ongoing protection.


Where can I use it?

Exterior joinery above ground: windows, doors, cladding, fascias, sheds and pergolas. Not for decking or direct ground contact.

Why choose Osmo WR 4001?


Using a dedicated primer creates a stable base that resists moisture uptake and supports the performance of your finishing coats. The result is tidy application, better durability and simpler future maintenance.

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