Oiling wood is the most natural way to protect and nourish it. Unlike stain or paint, oil penetrates deep into the wood grain and protects from the inside out, without forming a film on the surface. The result: a matt, soft finish that lets the wood breathe — popular for kitchens, bathrooms, garden furniture and wooden floors. In this article you’ll learn which oil to use when, and how to apply it correctly step by step.
When to use oil, when to use stain or paint?
| Oil | Stain | Paint | |
|---|---|---|---|
| **Appearance** | Natural, matt, “living” | Can add colour, grain visible | Fully opaque |
| **Protection** | Good (nourishes the wood) | Good (colours + protects) | Excellent (film layer) |
| **Maintenance** | Easy to touch up | Moderate | Can peel |
| **Wear resistance** | Lower than paint/stain | Medium | High (lacquer) |
| **Outdoors** | Good (garden furniture, decking) | Recommended (window frames) | Good (window frames) |
| **Indoors (furniture)** | Excellent | Fine | Fine |
| **Wooden floor** | Good (hard wax oil) | Not for floors | Not recommended |
Choose oil when: you want to preserve the natural look of the wood, nourish hardwood furniture, or touch up easily without sanding.
Types of wood oil
Linseed oil (raw or boiled)
The most traditional wood treatment. Penetrates deeply. Raw linseed oil dries extremely slowly (weeks). Boiled linseed oil dries faster.
Best for: indoor use, antique furniture, woodwork
Cost: €5 – €10 per litre
Teak oil
Specially designed for hardwood (teak, bangkirai, ipé). Penetrates well into dense, oily wood species that are difficult to treat. Gives a warm, golden hue.
Best for: teak garden furniture, hardwood decking, bangkirai terraces
Cost: €10 – €20 per litre
Hard wax oil (Osmo Polyx-Oil, Treatex, Rubio Monocoat)
Premium interior oils that both nourish and protect. Harder finish than standard oil — suitable for wooden floors. One coat is often sufficient.
Best for: wooden floors, kitchens, bathrooms (not for fully wet areas)
Cost: €20 – €50 per litre
Decking oil / Universal exterior oils
Penetrating protection for outdoors. Often turpentine-based with UV filters.
Best for: all exterior wood types, garden furniture, decking boards, fences
Cost: €10 – €25 per litre
Beeswax
Traditional furniture finish. Protects and gives a soft sheen. Less durable than modern hard wax oils.
Best for: indoor furniture, antique wood, chalk paint finishes
Cost: €10 – €20 per tin
Step by step: how to oil wood
Step 1: Clean
Remove dirt, grease and loose fibres. For outdoor use: use a green algae cleaner. For indoor furniture: wipe with a slightly damp cloth and vinegar (removes grease).
Leave to dry thoroughly (at least 24 hours for outdoor use, 2 hours for indoor).
Step 2: Sand
Sand the wood with the grain before treatment:
- New wood: grit 120–150
- Old wood with previous oil: grit 100–150 (to key the surface)
- Old wood with paint or stain: sand back to bare wood before applying new oil
Remove all dust completely.
Step 3: Apply the first coat of oil
Apply the oil with a cloth, foam roller or wide brush. When applying with a cloth: use circular motions for maximum penetration, then spread out with the grain.
Amount: apply as much oil as the wood can absorb — no thick puddles on the surface. The wood will “drink” the oil in.
Leave to soak in for 15–30 minutes.
Step 4: Remove excess oil
This is the critical step that almost everyone forgets: always remove excess oil with a dry cloth.
Excess oil left on the surface doesn’t dry properly, leaves a sticky surface, and can cause dark staining.
Step 5: Drying times
- Standard decking oil: 24 hours
- Hard wax oil (Osmo): 8–12 hours per coat
- Teak oil: 24–48 hours
- Linseed oil (boiled): 24–48 hours
Step 6: Second coat (optional)
For extra protection or a richer colour: apply a second coat in the same way after the first is fully dry. With hard wax oil, one coat is often sufficient.
Lightly sand between coats (grit 240–280) for a smoother finish.
Oiling a wooden floor: special considerations
Wooden floors face heavy wear (foot traffic). Use only floor-specific hard wax oil. Standard wood oils are too soft for this purpose.
Procedure for wooden floors:
- Sand the floor with a floor sander (grit 40–80–120)
- Hoover and remove all dust
- Apply hard wax oil with a floor roller (wide, short roller)
- Spread evenly in small sections (working from a corner towards the exit)
- Remove excess oil with a dry microfibre cloth
- Leave to dry for 12–24 hours
- Second coat: sand lightly (grit 180–240), repeat
Maintenance
| Application | Maintenance |
|---|---|
| Garden furniture (outdoor) | Oil 1–2 x per year |
| Hardwood decking | Oil 1 x per year |
| Wooden floor (hard wax oil) | Apply maintenance oil 1 x per year |
| Kitchen worktop (solid wood) | Every 3–6 months |
| Indoor furniture | 1 x per year or less |
Maintenance tip: use a maintenance oil (or the same oil) for touch-ups — you don’t need to sand first if you treat the wood in good time.
Fire hazard
Oily rags are a fire hazard. Used oil rags can spontaneously combust through exothermic oxidation while drying. Rinse used rags with water and lay them flat to dry (not scrunched up) or dispose of them immediately in a sealed bucket of water.
Frequently asked questions
How do I know if the wood needs re-oiling?
Pour a few drops of water onto the wood. Does the water bead? Then the oil protection is still active. Does the water soak straight in? Then it’s time for a new coat of oil.
Can I apply oil over stain or paint?
No. Oil cannot penetrate through a layer of stain or paint. You must first remove all stain or paint by sanding before you can use oil.
Which oil is best for a solid oak kitchen table?
Osmo Polyx-Oil or Rubio Monocoat are excellent choices for solid oak kitchen tables. They are wear-resistant, nourishing and water-repellent. Maintenance: apply maintenance wax once a year.
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