Frequently Asked Questions

How do I order?

You can place an order with one of our natural stone workers. He will measure the project, order the concrete slab directly from Kwantz, manufacture it according to plan in his workshop and install it. You can find a list of our partners here.

Where can I view the colour options?

If you want to see our different concrete colours in real life, you can make an appointment with one of the natural stone workers we partner with.

What about air bubbles in concrete? Can these be filled?

The presence of small air bubbles is inherent to concrete. These are only visible in sawn edges or in cut-outs of an undermount sink. You can choose to keep this natural character or ask the natural stone worker to fill them.

What are the dimensions of the concrete slabs?

The ultra-strong concrete slabs from Kwantz come in one standard size, namely a length of 3260 (+/- 2 ) mm, width 1383 (+/- 2) mm and a standard thickness of 25 (+/- 1) mm. A thicker looking concrete worktop can be achieved by working with mitered edges.

Screenshot 2024 02 07 at 15 40 37
Do I need to treat a concrete countertop after installation?

We recommend treating your concrete kitchen worktop daily with impregnating stainstop during the first week after installation. After one week, periodic maintenance is sufficient. This doesn’t close the concrete 100%, so that the stone still has the chance to "breathe". This means that certain substances can still penetrate after some time and cause a darkening. This needs time to evaporate back out. However, the (periodic) after-treatment with an impregnating agent will ensure that grease and dirt can’t penetrate the material as quickly. Please contact us for more information about designated maintenance products.

TIP! Wipe off stains and splashes with a damp cloth before they get the chance to dry.

How do I clean my concrete kitchen worktop?

Concrete belongs to the family of calcareous stones (such as bluestone, marble, travertine) that require a specific maintenance. Therefore, descaling products should be avoided when cleaning your concrete kitchen worktop. We advise you to clean your countertop with a neutral degreaser or with water and natural soap. This way, grease doesn’t get the chance to accumulate. Please stay clear of acid degreasers based on vinegar and lemon, because they descale the concrete, which can cause white spots. Always use products that are suitable for cleaning calcareous (natural) stone.

What should I pay attention to with a concrete kitchen worktop?

Kwantz concrete is ultra-strong concrete and belongs to the family of calcareous materials. The stone lives, evolves and will possibly get a patina with time. Please note: just like calcareous natural stones, concrete is sensitive to acids! So it is best to clean up spilled vinegar, red wine or lemon immediately, because these can permanently damage the countertop. Furthermore, it is best to keep the surface dry after each use, and don’t allow wet (coloured) liquids to stand for a long time, such as a wet planter, a damped bottle of detergent or a coffee cup with coffee under it.

Can I cut on my concrete worktop?

The surface of Kwantz concrete is very scratch-resistant, but it is not harder than steel for instance. In any case, the use of a cutting board with any type of worktop is recommended to maintain the character of the material.

Can I put a hot pan on my concrete countertop?

It is recommended to always use a coaster for hot pots and pans.

How do I maintain concrete in the bathroom?

Just like for concrete kitchen countertops, it is recommended to impregnate your stone. This will make the cleaning process easier. You can clean your Kwantz concrete in the bathroom with a soft sponge and a cleaning product that is specially intended for cleaning natural stone.

Use little detergent and brush over the concrete surface until all lime and soap residue is gone. To clean taps and shower head, use a limescale cleaner by applying it to a cloth (but don’t spray it directly). This will prevent the concrete from being damaged.