Special considerations when using concrete in kitchens. Concrete countertops for indoor or outdoor kitchens appeal to people looking for a contemporary look and who are ready to embrace the weathering that comes with everyday use. Given that concrete is naturally porous, applying a food-safe surface sealer is needed to help resistant water absorption and stains. While the concrete itself is very heat resistant, not all sealers are. Placing a hot pan on a sealed concrete countertop can cause damage or discolor the sealer. Concrete countertops, as well as dining tables and other concrete furniture, can develop minor hairline cracks due to the natural shrinking of concrete over time. These are usually not structural problems and won’t detract from the appearance overall. Glass-fiber-reinforced concrete countertops may be less likely to develop hairline cracks.To reduce the number of scratches on the surface of the concrete, avoid cutting directly on the countertop (use a cutting board).[this seems a little outside the realm of furniture?] Yes, let’s cut.