Porcelain and ceramic tiles are not porous you have to seal natural stone tile.
Do you seal ceramic tile before grouting.
Then grout anytime after the sealer has dried to the touch.
The very purpose of grouting is to fill those spaces once and for all with a paste that will harden into a waterproof seal.
Cleaning mortar out of grout lines and taking steps to remove thinset between tiles can help.
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.
It depends on the type of tile you have.
Do you seal the tiles too.
Sealing is done to strengthen tile or grout s defenses against dirt spills and erosion of grout but not all tile needs to be sealed.
Both dust and old grout pieces can prevent a good set.
Epoxy grout exception epoxy grout is a tough water resistant material that doesn t require sealer but it s not right for every tile application.
Use the normal grouting technique and let it dry completely before applying another sealer application to the tile and the grout.
In closing as long as you seal and maintain your tiles alongside the grout you can enjoy them for a very long time to come.
If they are then touch up the grout and then wait an additional 48 to 72 hours before you start sealing the grout.
When you re finished cleaning the grout allow the area to dry for 45 minutes before sealing.
Next choose your sealer based on the type of tile you have and its.
Unsealed tiles such as clay and natural stone.
Many tiles especially natural stone such as slate marble and limestone are porous and need to be sealed.
Man made tiles like porcelain or ceramic tiles won t experience this but pre sealing does help if they have little or no existing sealant on them.
Seal before grouting seal your raw stone tiles before grouting.
If your tile is ceramic or porcelain it probably won t need to be sealed.
If you don t apply sealer first grout will stick tenaciously to the tile surface and it will be extremely difficult to get off.
In fact cleaning tile joints before grouting is essential.