Grout sealer does expire. It needs to be changed from time to time. The expiration depends on the condition and surroundings of your tile.

What is the shelf life of grout sealer?

Store Grout Sealerin the original container, properly sealed to avoid conta- mination and solvent evaporation. Stored at 770 F (400 C), Grout Sealerwill have a shelf life of 12 months.

Does sealer go bad?

The effective shelf-life of a one-part product is usually two to four years, but some experts recommend using the seal up within 18 months to two years.