Since unglazed tiles do not have the protection that glazed tiles have, the instructions above for protecting grout apply for these tiles, as well. This includes quarry tile and unglazed tile we sometimes use for shower floors. We even recommend using the 511 Impregnator
over them to seal their surfaces at the same time you're sealing the grout. Use concentrated tile cleaners that have a neutral pH for regular cleaning like the Stone-Tech Neutral Cleaner
, which is sold in a concentrate that can be adjusted as necessary. These will safely remove grease, oils, and normal spills.