Concrete floor sealing
Bare concrete dusts, stains and soaks up oil. Sealing it stops that. A clear epoxy or PU seal coat is tougher than an acrylic sealer; a densifier hardens the surface without a film. Done for you, a seal coat on a sound slab runs about €20 to €50 a m², most of it the prep.
Free, no obligation. One local installer prices it, not five.
Sealers compared
| Sealer | What it does | Lasts |
|---|---|---|
| Densifier (silicate) | Soaks in and hardens the top of the concrete. No film, no shine on its own | Long, it's in the concrete |
| Acrylic sealer | A thin film that cuts dust and stains | Wears on busy routes; renewed often |
| Epoxy seal coat | A thin, hard, clear or tinted film | Years on light traffic |
| PU seal coat | Like epoxy, more flexible, UV stable | Years; won't yellow |
Which one for your floor
- A store room, plant room or shed that only needs to stop dusting: a densifier or an epoxy seal.
- A garage: a seal coat stops the dust but won't hide oil stains or take hot tyres like a full coating. See garage floors.
- A polished or exposed concrete look you want to keep: a clear densifier or a matt PU.
Before sealing
Even a clear seal needs clean, open concrete: oil and old paint ground off, the dust vacuumed. A sealer on a dirty slab seals the dirt in.
Materials for a two-pack floor sealer cost from about €2.60 a m² a coat, ex VAT.
Your floor, coated
Take a photo of the garage or the room, pick a finish and a colour, and see it before anyone quotes. Free, in under a minute.
- Upload a photo, or answer four quick questions.
- We pass it to one installer that covers your county.
- They ring you with a written price.
Preview of your photo, not a guarantee. Your photo goes to Google's Gemini service to make the picture.
A photo that works
- Daylight, or every light on.
- From the doorway, so most of the floor is in the shot.
- Cars, bikes and boxes can stay where they are.
- Hold the phone at chest height, level, not pointed at your feet.
Questions people ask
How do you seal a concrete floor?
Grind or clean it back to open concrete, vacuum, then roll on the sealer in thin coats.
Does sealing stop concrete dust?
Yes. A densifier hardens the surface; an epoxy or PU seal puts a film over it.
How often does a sealed floor need resealing?
Acrylic sealers wear fastest. Epoxy and PU seal coats last years on light traffic.
Is sealing cheaper than an epoxy coating?
Yes, but it does less. It stops dust and light stains; it won't cover a patched slab.
Get a price for your floor
Four taps and your number. It goes to one vetted epoxy flooring installer that covers your county, and they ring you back to look at the floor and give you a written price.
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Jump straight to any specification guide, our interactive calculator, the technical glossary or your county page.
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Get a free quote for your floor
Four taps and your number. One vetted epoxy flooring installer that covers your county rings you with a price. Nothing is agreed until you accept it.