It's important to seal your stone floor to protect it from spills, scratches and other mishaps.
If your floor isn't sealed, or hasn't been re-sealed in a long time, it won't be protected against spills and other accidents. For example, sauces such as ketchup are highly acidic and can damage natural stone permanently if the stone isn't protected.
The process includes removing the old sealer, cleaning the floor and re-sealing it with impregnating sealer that will soak into the stone. You may see a slight colour variation when sealing stone and can choose from a variety of sealers, including colour enhancing sealer.