If they are touch up grout and wait the requisite 48 to 72 hours before sealing.
Sealing ceramic tiles before grouting.
Allow new grout to cure for 48 to 72 hours before sealing.
Make sure grout lines aren t cracked chipped or otherwise compromised before treating with a sealant.
Seal the tile not the grout many tiles especially natural stone such as slate marble and limestone are porous and need to be sealed.
Unsealed tiles such as clay and natural stone must be sealed.
If the tile is unglazed and porous as mostly all travertine is then you will need to seal the tile before you grout it so that the grout does not soak into the tile and cause it to become dull.
Existing grout should be cleaned and dried before resealing.
Porcelain and ceramic tiles are not porous.
When you re finished cleaning the grout allow the area to dry for 45 minutes before sealing.
What a lot of diy ers and homeowners don t realize is that sealing your tile grout is one of the most important things to ensure your tile floor backsplash countertop or walls look great and last for a long time.