When Should You Use Stain or Wood Oil?
Tips & maintenance · Maintenance
MaintenanceStain or wood oil?
Two products that look alike in the shop and do something quite different in practice. What you choose determines how often you need to go back and how the wood looks.
- Stain: colour and UV
- Oil: grain and feel
- Oil can be touched up
What each product does
Both penetrate the wood, but with a different aim: protecting it against the weather, or letting the wood itself show at its best.
Stain puts the emphasis on protection and colour. It contains pigments that block UV radiation, which is exactly what causes greying. The more pigment, the better the protection — and the less of the grain you see. So a transparent stain protects for a shorter time than an opaque one.
Wood oil nourishes the wood and enhances its natural colour and figure. It soaks in deeply, makes the surface water-repellent and feels warm to the touch. Its UV protection is more limited, unless you use an oil with a UV filter.
The practical difference lies in touching up. An oiled surface you sand lightly and oil again, with no visible transition. A stained surface that starts to crack or flake has to be taken back completely first. That makes oil more forgiving to maintain, and stain longer-lasting per coat.
Oil on stain will not soak in, because the stain is already in the fibre. Stain on oil adheres poorly, for the same reason. If you want to switch, the old product has to come off completely first — by sanding or stripping.
- Stain
- pigment, UV protection, colour
- Wood oil
- nourishes, enhances the grain, water-repellent
- UV protection
- stain is strongest; oil with a UV filter comes close
- Touching up oil
- locally, with no transition
- Touching up stain
- first take back to a sound layer
- Indoors
- usually oil or hardwax oil
- Outdoors, keeping the colour
- stain, or oil with a UV filter
To be fair: neither is a one-off decision. Oil outdoors needs a coat every year, stain every two to five years. If you want neither, simply let the wood turn grey — structurally that is no problem, and it is the only truly maintenance-free choice.
In pictures · Stain versus oil
Schematic drawing.
Stain versus oil
Protection and colour
The choice when the wood is exposed to sun and rain and the colour has to stay.
- Strong UV protection from pigment
- Colour of your choice, transparent to opaque
- Lasts longer per coat
- Can crack or flake as it ages
- Touching up means taking it back first
Natural and nourishing
The choice when the grain and feel of the wood come first.
- Enhances colour and figure
- Feels warm and natural
- Can be touched up locally with no transition
- Limited UV protection, unless it has a filter
- Needs repeating more often: yearly outdoors
Which choice for which project
| Project | Recommended | Why |
|---|---|---|
| Fence or cladding | stain | large surfaces, lots of sun and rain, and you don't want to deal with it every year |
| Decking | oil | you walk on it; oil can be touched up locally where it wears |
| Garden furniture | oil, possibly with a UV filter | a warm look, and you can touch up spot by spot |
| Indoor floor | hardwax oil or lacquer | oil feels warm; lacquer is more hard-wearing but cannot be touched up |
| Worktop or tabletop | oil | food-safe versions exist and repairs are easy |
| Coloured exterior joinery | stain or opaque paint | here colour fastness and UV protection count most |
| Wood that may turn grey | nothing | cleaning is enough; greying is not damage |
Tinted wood oil comes in shades that match different wood species. An oil that is too dark covers the grain; one that is too light lets the greying show through. Always test on an inconspicuous corner first.
How to apply it
- CleanRemove dirt, green algae and old loose residue. Any product on a dirty surface only half adheres.
- Let it dry completelyAt least 48 hours of dry weather outdoors. On damp wood the product stays on the surface.
- Sand lightly120- to 180-grit where the surface is rough or grey. That opens the fibre and lets the product soak in.
- End grain firstTwice, because it absorbs the most. This is the step that makes the biggest difference to lifespan.
- Apply thinlyAlong the grain, with a brush or cloth. Two thin coats beat one thick one.
- Wipe off the excessWith oil: after a quarter of an hour, wipe off the excess oil with a cloth. Whatever stays on the surface turns sticky and attracts dust.
- CuringFollow the time on the packaging and don't load the surface too early. With oil, full curing takes longer than it feels.
A bundle of rags soaked in wood oil can ignite spontaneously while drying. Lay used rags out flat on a non-combustible surface or soak them in water before you throw them away.
Frequently asked questions about stain and wood oil
What is the difference between stain and wood oil?
Both penetrate the wood, but stain puts the emphasis on protection and colour — with pigment against UV — while oil nourishes the wood and enhances the natural grain.
When do I choose stain?
For large outdoor surfaces that get a lot of sun and rain, such as fences and cladding, and when you want to control the colour of the wood.
When is oil the better choice?
When the natural colour and grain come first, and on surfaces you want to be able to touch up locally: decking, garden furniture, indoor floors and worktops.
Does wood oil protect against UV?
Ordinary oil only to a limited extent. Oil with a UV filter comes close to stain and holds the original colour much longer.
How often do I need to re-treat?
Oiled wood outdoors roughly once a year. Stain lasts two to five years, but can crack or flake — and then you have to take it back first before you can start again.
Can I apply oil over stain?
No. The stain is already in the fibre, so the oil won't soak in. Switching means removing the old product completely first.
Get started
Wood oil in the colour of your wood, and the maintenance rhythm for each piece of furniture.
Have a question about your project? Just ask — we're happy to help.
Photos via Wikimedia Commons: Picea abies — Neitram, CC BY-SA 3.0 · Wooden box with linseed oil: the oiled board takes on a deeper, warmer colour — Ylænelle, CC BY-SA 4.0
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