Once granite is originally sealed, it is quite easy to maintain. The first sealing of granite is one of the most important because granite is naturally porous and will stain very easily without it. After you seal your countertop, your granite is protected and is now ready for use. Remember that it is imperative that you reseal your granite counters at minimum once per year. This can be done either on your own or can be done by a professional. Either way it will help to ensure that your granite countertops remain stain free. If there is a spill, make sure to clean it up before the stain gets a chance to seep into the surface. Because of its porous nature, granite is somewhat absorbent and even when sealed can still absorb stains if spills are left untouched for any extended period of time.