Material
Sealed wood
A finish rather than a surface. Spills come off easily if you catch them, and become a refinishing job if the liquid gets underneath.
- SurfaceSemi porous
- WashingSpot only
- Colour run riskLow
- Reviewed31 August 2026
What sealed wood can and cannot take
- Heat Use with care
- Water and soaking Use with care
- Acids, including vinegar Use with care
- Strong alkalis Avoid
- Solvents Avoid
- Chlorine bleach Avoid
- Abrasives Avoid
Always test on a hidden area first and let it dry before you treat the visible mark.
General rules for sealed wood
On sealed wood you are cleaning the finish, not the wood. Everything follows from that.
Wipe spills immediately, because the finish is only a barrier while the liquid is on top of it. Once anything gets through a seam or a worn patch and into the grain, no surface cleaning reaches it.
Use a barely damp cloth and never leave standing liquid. Avoid bleach, chlorine, ammonia and abrasive powders, all of which attack the finish, and never use a steam mop: the moisture goes straight down the board joints and lifts them.
Check the label
Oiled and lacquered floors are not the same thing. If the floor was oiled, the manufacturer will have a matching maintenance oil, and using the wrong product can leave a patch that shows.
Stains on sealed wood
Cleaners on sealed wood
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Washing up liquid
Yes, with a pre-test
A little in warm water on a damp cloth is the standard manufacturer method for a sealed floor. The risk is the amount of water, not the detergent.
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White vinegar
No, not recommended
Repeated acid contact dulls a lacquered finish, and floor finish manufacturers do not include it in their maintenance instructions. There is no benefit on a sealed floor that a damp cloth does not already give you.
Sealed wood is the easiest material on this site to clean and the least forgiving if you leave it.
Two minutes versus two hours
A coffee spill wiped straight away leaves nothing at all. The same spill left to sit finds the joint between two boards, gets under the finish and reaches the grain, and at that point the only real fix is sanding and resealing that area.
What damages the finish
Bleach, ammonia, abrasive powders and steam. Steam is the one that surprises people, because a steam mop looks like the gentlest possible option and is one of the most damaging things you can do to a wood floor.
Sources
What we checked and when. Where a manufacturer instruction disagrees with anything here, follow the manufacturer.
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Osmo UK, floor care dos and donts
manufacturer
Finish manufacturer instruction to wipe spills including coffee immediately, use only a slightly damp cloth, and avoid steam, bleach, chlorine, ammonia and abrasive powders.
Checked 31 August 2026
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Junckers, safe cleaning tips for hardwood floors
manufacturer
Flooring manufacturer guidance to wipe spills immediately before they reach the grain, use a damp cloth with a little dish soap, and avoid abrasive tools and harsh chemicals.
Checked 31 August 2026