
Osmo Terras-Olie
Osmo Decking Oil is a product based on oils and waxes that creates a protected surface after treatment. The surface is resistant to water, dirt and the sun.
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The best Osmo finishes for Accoya outdoors
The best way to treat Accoya outdoors is with Osmo UV-Beschermingsolie, because acetylated wood like Accoya already absorbs less moisture than untreated wood, so an oil here mainly focuses on colour stability under UV light.


Osmo Decking Oil is a product based on oils and waxes that creates a protected surface after treatment. The surface is resistant to water, dirt and the sun.
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Silk-matt, colourless protection based on natural oils for exterior wood.
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Osmo Natural Oil Stain is an oil and wax-based product that creates a protective surface after treatment. The surface is then resistant to water, dirt, and sunlight.
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Osmo Country Colour is a product based on oils and waxes that creates a protected surface after treatment. The surface is resistant to water and dirt.
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Highly effective concentrate for cleaning untreated or oiled wood. Quick and easy to use.
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Thick specialist cleaner developed to clean and refresh greyed exterior wood.
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Extremely weather-resistant and UV-protective wood finish for treating exterior wood. Osmo Opaque Stain is a breathable and water-repellent product. Once dry, the stain is safe for humans, animals, and plants, and is also suitable for treating children's toys such as playground equipment. Osmo Opaque Stain is suitable for treating almost all exterior wood, such as facades, fences, gates, garden sheds, garden furniture, and carports. The Opaque Stain is not suitable for patios and decking. Osmo Opaque Stain dries after just 3 to 4 hours. This means the wood can be treated with two coats in one day.
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Finish Accoya outdoors with Osmo UV-Beschermingsolie on facades, window frames and fences, and with Osmo Terras-Olie on a terrace. Accoya is acetylated wood: it absorbs little moisture and hardly moves. The finish is therefore mainly intended to hold on to the light colour for longer.
On vertical wood, apply UV-Beschermingsolie in two coats: two coats of 420 clear, or first a coloured coat followed by a coat of 420. The oil protects against UV light by a factor of 12 compared with untreated wood. If you want to keep the light tone of Accoya, 429 Natural is an option; it is only intended for light wood species. Also see facade cladding and window frame.
UV-Beschermingsolie is not suitable for horizontal surfaces. For an Accoya terrace, choose Terras-Olie in a pigmented colour instead, so the wood greys less quickly. For extra grip, apply Antislip Terras-Olie 430 as a third coat, never directly on bare wood. Read more under terrace.
Let new wood weather for at least six weeks first, then clean it. If Accoya has already turned grey, first remove the grey with Power-Gel. On wood that has been treated before, always do a test first. One litre of UV-Beschermingsolie covers about 18 m² per coat.
Clean treated wood with Terrasreiniger and never use a pressure washer. When renovating, apply no more than one new coat, otherwise the second coat will not adhere well. If you deliberately want a silver-grey look, Vergrijzingsbeits gives an even grey colour straight away.
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