We recommend resealing your countertops once a year to prevent staining. We will leave you with a bottle of sealer at the time of install as well, it should last you a few years. Simply spray on the sealer, leave it on for about 15 minutes and wipe it dry. You can seal your countertops more than once a year if you would like to for extra protection. If you notice water marks near your sink/common workplace areas, that means its time to reseal!