If you have granite, marble, or another natural stone, sealing is one of the most important steps you can take. Sealer does not make the stone completely waterproof, but it significantly slows down liquid absorption.
Most countertops should be sealed once a year, though high traffic kitchens may require sealing more often. A simple water test can help you determine whether it is time. Place a few drops of water on the surface. If the water darkens the stone within a few minutes, the sealer has likely worn off.
Applying sealer is a straightforward process. Clean the surface thoroughly, allow it to dry, apply the sealer evenly, and wipe off any excess. This small annual task can prevent deep staining and preserve the natural beauty of the stone.