Special considerations: Tile grout presents the biggest challenge, because it needs to stand up to both bacteria and the products designed to kill bacteria. The folks at Oregon Tile and Marble help decipher the choices:Standard sanded cement grout is used for joints 1/8 inch or wider. Standard cement grout (both sanded and unsanded) should be sealed with an impregnating product.Standard unsanded cement grout is designed for joints 1/8 inch or less in width, in conjunction with tiles that might be scratched by aggregate or with calcium carbonate–based stone, like marble or limestone.Fusion Pro Single Component Grout offers the best of both cement and epoxy grouts for ceramic tile installations. It's hard like cement, doesn't require sealing, doesn't stain and is easy to work with. To boot, it's infused with antimicrobial Microban.