The sealant ingredient that is used to initially seal tile grout invariably deteriorates over time, especially in areas of high traffic. When this sealant wears off, mould and bacteria are able to spread and multiply. The bacteria then becomes trapped and is unable to be removed from regular cleaning. This ,in turn, affects the entire look of the tile, which can become discoloured and stained. Grout Sealing is an additional service that we recommend applying directly after cleaning to really complete the look and feel of your tiles.