Applying a sealer will protect the surface of your countertop. A sign to reapply sealer is if you notice water soaking into the concrete within 10-15 minutes. You can apply sealer yourself but this is not recommended without practice. It’s not rocket science, but it’s worth learning the tricks to get it right the first time. You can contact Molded Stone Studio to find out the sealer we use and directions on how to apply it. Molded Stone Studio is not responsible for the outcome of DIY sealing.