Stone sealing is the process of applying sealant to stone. This helps to protect the stone from staining and general wear and tear. The sealant acts as a barrier between the stone and any particles or liquid that it may come in contact with. Sealing your stone is a part of maintaining your stone and should be done as per need. There is no thumb rule on how often you should seal your stone – it depends on a few factors such as the type of stone, the climate you live in, the use of the surface etc.