A coating is a layer of material applied to the surface of concrete that cures into a protective film. Common floor coatings include epoxy, polyaspartic, and polyurethane. Coatings can be clear or colored and are usually thicker than sealers. They cover the slab’s appearance while protecting it from wear and chemicals.
Coating vs. Sealer on Concrete
The words get mixed up, but they do different jobs. A coating sits on top like a sheet of plastic wrap. A penetrating sealer works more like waterproofing spray on a jacket: it soaks in and bonds with the concrete and doesn’t alter the surface appearance.
That difference matters when you choose:
- Pick a coating when you want color, flake, an easy-to-mop surface, or protection from oil and chemicals. Resin floor coatings range from thin films to thick mortars, depending on the abuse they have to take.
- Pick a penetrating sealer when you want concrete to keep looking like concrete, or on outdoor slabs where a film could peel.
How a Floor Coating Is Built
Most floor coatings are applied in layers. A primer promotes adhesion and seals the substrate, color or flake goes on next, and a clear topcoat takes the daily wear. Every layer depends on the one below it, so prep on the bare slab matters most. For a full comparison of systems, see our guide to concrete floor coatings.
Coating FAQ
What is the best floor coating?
There’s no single best one. Epoxy is a common base, polyaspartic is a fast-curing topcoat that resists color and gloss changes, and polyurethane is a proven clear topcoat. The best choice depends on the space, sun exposure, and your schedule.
Can I coat a floor myself?
DIY kits exist, but prep is the hard part. Without grinding equipment, it’s tough to give the coating enough to grip, and that’s where most failures start. Thin one-part paints are easier to apply but wear out faster.