How to Clean and Maintain Sealed Concrete Countertops

Why Maintenance Matters

One of the biggest advantages of concrete countertops is that they can last a lifetime — but only if they're maintained properly. The good news is that maintenance is straightforward. Most of it comes down to a few simple habits and knowing what to avoid. The amount of maintenance your countertop requires will largely depend on which sealer you used, so we'll break everything down by sealer type.

Daily Cleaning

Keeping your concrete countertops clean on a daily basis is easy. Use any standard household surface cleaner and a soft cloth, sponge, or paper towel. That's it. There are no special cleaners required and no complicated routines. The one thing you want to avoid is anything abrasive. Magic erasers, steel wool, scouring pads, and abrasive powdered cleansers will dull or scratch the sealer finish over time. If you have a stubborn spot, a little extra surface cleaner and some patience with a soft cloth will get the job done without damaging the surface.

What to Avoid

Regardless of which sealer you have on your countertops, there are a few universal rules to follow:

Never cut directly on the surface. Your concrete countertop is not a cutting board. Even the toughest sealers can be scratched by a knife blade. Always use a cutting board when preparing food.

Always use hot pads or trivets. Most of our sealers are heat resistant up to approximately 400°F, but it is never a good idea to place a hot pan directly from the stove or oven onto the countertop. The extreme concentrated heat can damage or discolor the sealer. Make it a habit to always use a hot pad or trivet.

Don't let acidic spills sit. Things like lemon juice, vinegar, wine, and coffee are generally not a problem if you wipe them up in a reasonable amount of time. The issue comes when acidic liquids get trapped — for example, under the bottom of a glass or a bottle — and sit on the surface for an extended period. That prolonged contact can etch or stain certain sealers. Simply wipe up spills and avoid leaving wet glasses sitting in one spot for hours.

Watch out for rubber feet. Rubber feet on small appliances like mixers, coffee makers, and blenders can leave marks on sealed concrete over time. We recommend replacing rubber feet with felt pads where possible, or placing a small mat under appliances that stay on the countertop permanently.

Avoid tape. Avoiding sticking tape of any kind to a sealed concrete countertop. The glue in the tape can often form a chemical bond with the resin in the sealer and will result in the sealer peeling when the tape is removed. 

Maintenance by Sealer Type

How often you need to reseal — and whether you need to reseal at all — depends entirely on which sealer is on your countertop. Here's what to expect from each:

SiAcryl 14 (Penetrating Acrylic Sealer)

Z SiAcryl 14 is a penetrating sealer that soaks into the concrete rather than forming a thick topical coating. It gives your countertop a natural, low-luster finish with very little darkening. Because it's a thinner, penetrating product, it does wear faster than topical coatings.

Resealing frequency: Every 2–3 years, depending on the amount of use and wear your countertops see. A kitchen that gets heavy daily use may lean closer to the 2-year mark, while a bathroom vanity or less-used surface may go the full 3 years or more.

How to tell it's time to reseal: Sprinkle a few drops of water on the surface. If the water beads up and sits on top, the sealer is still performing well. If the water begins to soak in and darken the concrete, it's time to reapply. Reapplication is simple — lightly clean the surface, make sure it's completely dry, and apply 3–4 thin coats of SiAcryl 14 using a micro-fiber applicator pad, working the sealer into the concrete until it's fully absorbed.

Aqua-Thane M35 (Matte Polyurethane)

Z Aqua-Thane M35 is a two-component water-based polyurethane that provides a matte to satin finish with excellent stain, abrasion, and chemical resistance. It's a topical coating, meaning it forms a protective layer on top of the concrete rather than absorbing into it.

Resealing frequency: Every 5–10 years, depending on the amount of daily use and wear. The polyurethane formula is significantly more durable than acrylic sealers, so you'll get many more years between coats.

How to tell it's time to reseal: Look for areas where the finish has become visibly thin, dull, or worn — typically around the sink or the most heavily used prep areas. When it's time, lightly sand the surface with a fine grit sandpaper, clean thoroughly, and apply 2 fresh coats.

Aqua-Thane G40 (Gloss Polyurethane)

Z Aqua-Thane G40 is the high-gloss version of the Aqua-Thane line. It provides the same excellent durability as the M35 but with a glossy, darkening "wet look" finish. The G40 will darken or "wet out" the concrete similar to when water is applied to an unsealed surface.

Resealing frequency: Every 5–10 years, depending on use and wear — the same as the M35.

How to tell it's time to reseal: You'll notice the gloss level diminishing in high-traffic areas first. The same light sanding and recoating process applies. If you want to maintain the full glossy look, keep an eye on areas around the sink and main prep zones.

Aqua-Poxy (Water-Based Epoxy)

Z Aqua-Poxy is a two-part water-based epoxy that provides a durable, medium-gloss finish with little to no darkening. It goes on thin and can be built up to a traditional epoxy thickness with multiple coats. It can also be used as a primer coat under Ultra Z Poxy to prevent darkening.

Resealing frequency: Resealing is not typically necessary. Epoxy sealers form an extremely durable barrier that holds up well over the long term. The only reason you would need to recoat is if the surface becomes scratched or dull and you want to refresh the look.

How to maintain: Keep up with regular cleaning using a soft cloth and surface cleaner. If scratches accumulate over the years and the surface has lost its luster, a light sanding followed by a fresh coat of Aqua-Poxy will bring it back to life.

Ultra Z Poxy (Clear Epoxy Resin)

Ultra Z Poxy is a crystal-clear, self-leveling epoxy coating system. It's among the clearest and hardest epoxies on the market and is used for both clear coat applications and decorative epoxy countertops with pigments and metallic powders.

Resealing frequency: Resealing is not typically necessary. Like Aqua-Poxy, the epoxy forms a hard, durable surface that doesn't wear down under normal use. You would only need to recoat if the surface has become scratched or dulled and you want to restore the finish.

How to maintain: The same daily cleaning routine applies — soft cloth and standard surface cleaner. Avoid abrasive pads. Ultra Z Poxy is heat resistant up to approximately 400°F, but always use hot pads as a best practice. If your epoxy countertop does develop scratches or dull spots over time, a light sanding and a fresh pour of Ultra Z Poxy will bring it right back.

Quick Reference: Resealing Schedule

Dealing with Scratches and Minor Damage

Scratches happen — especially around the sink and prep areas. The repair approach depends on your sealer:

For SiAcryl 14: Light scratches in the sealer can often be addressed by simply reapplying a coat or two of SiAcryl 14 to the affected area. Since it's a penetrating product, it blends well without visible lines.

For Aqua-Thane M35 and G40: Light surface scratches can be addressed by lightly sanding the scratched area and applying a fresh coat. For best results, feather the new coat slightly beyond the damaged area to blend it in.

For Aqua-Poxy and Ultra Z Poxy: Epoxy surfaces can be lightly sanded with fine grit sandpaper to smooth out scratches, then recoated. For Ultra Z Poxy, a full recoat of the affected section will self-level and restore the original clarity and gloss.

Long-Term Care Tips

A few additional habits will keep your concrete countertops looking their best for years:

Use felt pads under appliances. Replace rubber feet on mixers, coffee makers, and other small appliances with felt pads to prevent marks on the sealed surface.

Wipe up spills promptly. This is especially important for acidic liquids like citrus juice, vinegar, and wine. Quick cleanup prevents any chance of etching or staining.

Don't drag heavy objects. Sliding heavy pots, cast iron pans, or ceramic dishes across the surface can scratch the sealer. Always lift items rather than dragging them.

Keep the surface dry around the sink. Standing water around the sink area is the most common cause of sealer wear. Wipe down the area around your sink and faucet regularly to prevent prolonged water exposure.

Concrete countertops are one of the most durable and customizable surfaces you can have in your home. With these simple maintenance habits, your countertop will look great for years to come. If you have questions about which sealer is on your countertop or how to reseal, don't hesitate to contact us or call us at 570-587-3799. We're happy to help.