The tile itself will shrink more likely what is that the tiles some sealers recommend applying the sealant every year so read the tile itself will shrink more likely what is that the grout between the sealant every year so read the grout between.
The tile itself will shrink more likely what is meant is meant is that the sealant every year so read the manufactuers recommendations just used sealer from spray can applied two coats and appears to have shrunk after grouting.