Osmo Uv Protection Oil Tints - Red Cedar - 3L

Drying time: approx. 12 hours (normal climatic conditions, 23°C /50%, normal humidity). Lower tem...

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This guide is for homeowners and professionals looking to protect and enhance the natural beauty of exterior vertical wood surfaces. The Osmo UV-Protection-Oil Extra offers a durable, microporous finish that prevents greying and protects against mildew, algae, and fungal attack, all while maintaining the wood's natural character. A key consideration is its longer drying time under suboptimal conditions.

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Model Part Number428
BrandOsmo

Extended Product Information

FAQs

How long does Osmo UV-Protection-Oil Extra take to dry?

Under normal climatic conditions (23°C / 50% humidity), drying time is approximately 12 hours. Lower temperatures and/or higher humidity can significantly increase drying time.

Can I use this on decking?

No, this product is specifically recommended for vertical wood surfaces. It is not designed for horizontal surfaces or areas subject to heavy foot traffic like decking.

What is the coverage rate?

Approximately 18 m²/L with one coat. Two coats are required, so the effective coverage is about 9 m²/L for the complete job.

How do I clean the treated wood?

Clean regularly with a damp cloth. For tougher dirt, use Osmo Wash and Care. Avoid abrasive cleaners.

What does 'UV Protection factor 12' mean?

It indicates the level of protection against UV rays that cause wood to grey. This factor effectively slows down the greying process without hiding the wood's natural appearance.

Do I need to re-coat every year?

Re-coating is recommended when signs of wear become visible, which can vary greatly depending on the exposure of the wood. It is not typically an annual requirement but rather based on condition.

Can I apply this over existing finishes?

It's best to apply to bare, clean wood. If there's an existing finish, it should be completely removed or tested for compatibility. Osmo generally recommends application on bare wood for optimal performance.

Troubleshooting

Uneven color or finish appearance.

Ensure consistent application thickness and avoid over-application. Remove excess oil thoroughly before it dries. Ensure the wood surface was uniformly prepared.

Extended drying time.

This is often due to low temperatures or high humidity. Ensure adequate ventilation and maintain a temperature above 10°C (50°F). Avoid application if rain or heavy dew is expected shortly after application.

Oil not penetrating the wood properly.

The wood surface may be too dense, sealed, or contaminated. Ensure the wood is clean, dry, and properly prepared. For very dense woods, a lighter application might be necessary.

Whiteish or cloudy appearance after drying.

This can occur if the oil was applied too thickly or if moisture got trapped during the drying process. This is usually a surface issue and can often be resolved by lightly sanding and applying a very thin coat.

Pros and Cons

Pros

  • Protects wood from UV damage and greying.
  • Resists fungal, algal, and mildew growth.
  • Maintains wood's natural look and breathability.
  • Durable, flexible finish that won't crack or peel.
  • Based on natural, renewable resources.

Cons

  • Drying time can be significantly extended by low temperatures and high humidity.
  • Requires two coats for optimal protection.
  • Specific tints are mixed to order, potentially affecting availability.
  • Requires re-coating when signs of wear appear, not a permanent solution.

Setup, Compatibility & Care

Preparation: Ensure the wood surface is clean, dry, and free from dust, grease, and old coatings. If the wood is already greyed, it may need to be cleaned and restored before application. Osmo Wood Reviver Power Cleaner is recommended for this.

Application:

  1. Apply thinly and evenly with a flat brush or Osmo's specific applicator tools.
  2. Work the oil into the wood surface.
  3. Remove any excess oil before it dries.
  4. A second coat is required for full protection. Apply as per step 1 and 2.

Compatibility: Suitable for all types of vertical wood surfaces in outdoor areas. Not recommended for horizontal surfaces or areas subject to heavy wear like decking.

Care: Clean regularly with a damp cloth. For more intensive cleaning, use Osmo Wash and Care. Re-coat with one thin coat when signs of wear become visible, typically after several years depending on exposure.