How We Sealed Our Ardex Concrete Kitchen Counters with a Food-Safe Finish

Thank you for all the kind messages about Teddy’s arrival last week. We’re home and slowly settling into life with a newborn again, so our posting schedule will be lighter for a bit (and if anyone has tips for getting a baby to sleep consistently between 10pm and 4am, please share!). One project we hurried to finish about 48 hours before Teddy was born was sealing our recently Ardexed kitchen counters.

We’ve posted other sealing tutorials before—on de-hazing and sealing tile, sealing grout, and sealing cork—so this time I’ll focus on the specific approach we used for our Ardex concrete counters and why we chose it.

Because a bad sealing choice can permanently affect concrete countertops, we read a lot of advice and took reader comments into account when researching sealers. Ultimately we went with a two-step system: two coats of 511 Impregnator Sealer to seal the concrete itself, followed by three coats of Safecoat Acrylacq as a protective, food-safe topcoat.

We used the 511 Impregnator first because its primary job is to penetrate and seal the concrete against stains and moisture absorption. It has a thin, water-like consistency that made application straightforward. I poured a small amount into a bowl and brushed it liberally over the clean counter surface. The instructions suggested wiping off excess after a few minutes; most of the product soaked in quickly for us, but I wiped as recommended to be thorough. The surface looked darker and blotchy during application, but once the sealer fully absorbed and dried, the color returned to normal.

We applied a second coat of the impregnator 24 hours after the first and let that last coat cure for 24 hours before moving on to the topcoat. For the surface finish we chose Safecoat Acrylacq because it is non-toxic and marketed as 100% food-safe, which makes it ideal for kitchen countertops. It also creates a wear-resistant, stain-resistant surface and gives the concrete a more polished appearance.

For the Acrylacq application I poured small puddles directly on the counter and spread them thinly with a brush. While the wet coat has a slight bluish tint, that disappears as it dries. We applied three thin coats total, allowing roughly 12 hours of drying time between coats. After the final coat we let the counters cure for three full days before placing anything on them, even though they were dry to the touch much sooner.

Although we used the satin version of Acrylacq, the finish looks noticeably glossier than the original chalky Ardex surface. That extra sheen helps the counters read more like stone and less like a DIY project, and it provides real functional benefits: liquids bead up on the surface instead of soaking in, and spills can be wiped away without leaving permanent rings or dark spots.

We were concerned about scratches, since some sealers can highlight them. After cooking several family meals and sliding heavy dishes across the counters, we haven’t noticed significant scratching so far. The combination of the impregnator and the Acrylacq topcoat seems to offer good scratch resistance in everyday kitchen use.

My one gripe is that the glossier finish makes surface imperfections more visible—areas where I could have sanded a little smoother before sealing stand out more than they did when the surface was matte. Sherry is more relaxed about those little flaws and says they add character, but the perfectionist in me notices spots I might have worked on more carefully.

Overall, we’re thrilled to have the counters finished and the kitchen back in everyday use. The finish is a major improvement over the old yellow laminate we had before and gives the counters a genuine, finished feel. There are still a few technique improvements I’d like to make—primarily sanding the Ardex more smoothly next time—but the sealing step made the biggest visual and practical difference.

We’ll keep using the counters and report back on long-term wear—whether stains eventually show through or scratches appear over months of use. For now, the counters are holding up well, and spills bead up and wipe clean without staining.

Note: Some readers have asked whether we’ll paint the lower cabinets now that the counters are done. It’s possible, but at the moment we’re more focused on replacing the faux brick linoleum floor, so that’s higher on our to-do list.

Has anyone else used the same combination of 511 Impregnator and Safecoat Acrylacq, or had success with a different sealer system? Share your experience—what worked, what didn’t, and any tips for improving durability—so others tackling Ardex counters can learn from it.

And now, because many of you asked for a comparison shot: here’s Teddy at four days old.

Below is Clara in the same pose at about three weeks old. They share long fingers and toes, faint blonde eyebrows, and similar chins—though Clara had noticeably less hair. In person they look related, but not identical.

We’re also still accepting newborn-sleep strategies—especially for that 10pm to 4am stretch. We’d love to hear your tips.