Osmo UV-Protection Oil Extra Clear Satin 2.5L

SURFACE PREPARATION

Wood surface must be clean, dry and frost-free (moisture content max. 20%). Ideally, surfaces are sanded no finer than a P120 grit grade of sand paper. Sanding to finer grades will reduce required absorbency.
Osmo UV-Protection-Oil Exra is ready to use. Do not thin. Stir well using a flat stirring stick or spatula before use. If possible, and if the wood is an absorbent species, please apply the first coat to all sides before installation.
Fresh wood containing natural wood ingredients /extractives (eg: Cedar, Larch, Teak, Mahogany or Iroko) are often less absorbent and need to weather off first before applying the product. Please refer to website ‘Suitability’ section for more details. Weathering helps ingredient rich wood become more absorbent and the wood finish adheres optimally. Weathering is also required if ingredient rich wood has been freshly sanded or renovated.

A coloured base coat is recommended, e.g. Natural Oil Woodstain. Coloured base coats can improve UV protection.
For renovations, clean old microporous wood finishes thoroughly. De-grey any weathered bare wood with Osmo Wood Reviver Power-Gel before applying an Osmo exterior product.
Old paints and lacquers must be completely removed. As a general rule, wear a dust mask during sanding works. To maintain absorbency, avoid sanding surfaces finer than a P120 grit. Weather ingredient rich wood after sanding.
The finished surface is influenced by several factors, including the condition of the wood. Therefore, a trial application is always required, especially for unfamiliar surfaces.
Soft wood species like Pine or Spruce are more prone to blue stain, rot and insects. If desired, pre-treat these soft woods if possible on all sides with Osmo WR Base Coat.

METHOD OF APPLICATION

With Osmo Flat Brush or Osmo Microfibre Roller, apply thinly along the wood grain and spread well.
Allow to dry for approx. 12 hours. Cooler temperatures, higher humidity levels or over application will delay drying. Once dry, apply the second coat thinly.
When recoating colour treated surfaces, or for renovation works, one coat applied to the clean and dry surface is usually sufficient.

Top Tips:

1. Stir well using a flat stirring stick or spatula.
2. Sand wood to a final P120 grit sand paper grade. This is the optimal grade for applying Osmo UV Protection-Oils.
3. For ingredient-rich wood species (eg: Cedar, Iroko, Teak, Mahogany etc.), please allow 12 weeks weathering prior to application.
4. UV-Protection Oils perform optimally on vertically structured timber. For horizontal sections there will be more maintenance.
5. On horizontal sections, ensure at least a 15 degree angle to facilitate water run-off. Sharp edges must be rounded (radius > 2 mm).
6. Over application , lower temperatures and poor ventilation will increase the drying times.
7. UV rays from the sun help to break down protective lignin surrounding the fibres in the wood. Moisture also helps to deplete the lignin and the wood fibres begin to grey naturally. Osmo UV-Protection Oils delay the greying effect 12 x more effectively than bare timber.
8. Osmo UV-Protection-Oil 420 Extra is furnished with active biocides to help protect the film coating against the effects from mould, algae and fungal attack. The added biocides do not prevent mould, algae and fungal growth forming on the coating.
9. If a clear UV protective finish without biocides is desired ( eg for animal enclosures ), use Osmo UV-Protection-Oil 410.
10. Some timbers like Oak and Chestnut are notoriously rich in natural tannins and these ingredients can blacken surfaces when exposed to moisture, sunlight and iron oxides (eg from wire wool). Horizontal sections are more prone to discolouration whereby moisture can accumulate then escape through a breathable coating like Osmo. As the moisture escapes it lowers the risk of warping however, natural tannins can migrate to the surface and cause some black staining. To help reduce this, try to clean the first signs of tannin spots away from the coating with a damp cloth. Over time, the tannins will deplete and the discolouration will be less problematic. Choosing a darker coloured Osmo UV-Protection oil tint, or Osmo Natural Oil Wood stain ( excluding 701 clear matt) can also help to mask discolouration
11. Many wood species (eg Larch) contain water-soluble coloured extractives which may leach out naturally when weathered. Bare weathered wood can often be refreshed using Osmo Wood Reviver Power Gel prior to treatment. Always trial apply first.

Additional Information:

1. Approx. coverage: 18m²/L with one coat
2. No. of coats: 2
3. Ideal application temperature: +10°C to 35°C
4. Drying time: 12hrs.
5. Sizes: 0.125L, 0.750L, 2.5L

All exterior woods grey into a patina colour over time, but UV-Protection Oil has been developed to  slow the greying process by (UV factor) 12 times in comparison to untreated wood. Wood colour will fade over time. To maintain some colour for longer, consider transparent coloured options from Osmo like UV Protection Oil Tints or Natural Oil Wood Stain.

Ideal for windows, doors, cladding, fencing and other vertically structured joinery (not recommended on flat surfaces such as decking).

Natural oil-based and microporous finish does not crack, flake, peel or blister. Water and dirt resistant, moisture regulating and reduces wood swelling and shrinkage.