In some cases it makes perfect sense to seal the stone.  Properly sealed stone will help protect against everyday dirt and spills.  In other cases, especially polished stone products, it is best to leave the stone untreated.  Topical sealers can alter the surface texture and finish, as well as build up on the surface creating a layer that is less durable than stone.  Dolphin Carpet & Tile will not seal polished products for this reason.

“The marble institute of America (MIA) recognizes the benefits that sealers can provide in certain applications.  MIA recommends that care be exercised in the application of any chemical to a stone’s surface.  Although normally innocent in and of themselves, some sealers have reportedly reacted with some cleaning/maintenance chemicals and/or with components within the stone surface, causing some reactions.”  Dolphin Carpet and Tile assumes no risk should this occur.