Does grout go bad

Yes, grout can go bad over time, particularly if it's pre-mixed or contains additives that can degrade. Factors such as exposure to moisture, temperature fluctuations, and improper storage can affect its longevity. Once mixed, cement-based grout typically has a limited working time before it hardens, making it unusable if not applied promptly. If you notice changes in color, consistency, or an unpleasant odor, it's best to replace it.