This stress will be tensile during temperature decrease, or compressive. during temperature increase. If the compressive stress level exceeds the column buckling resistance of. the restrained length, then lateral buckling (or snaking) will occur.
Dry Time. In most cases, you should allow the grout to dry overnight before using that room as total dry time may take up to 24 hours. If you are thinking about sealing your grout after you have installed it, you need to wait even longer than that so that all of the moisture has had time to be released.
By filling the gaps, it prevents food, dirt and water from getting between the tiles. Once the grout is sealed, it's still not ready to use. Most sealers require at least 24 hours to dry before they can get wet. Some formulas may even need up to three days to dry. Homeowners always need to consult with the manufacturer's specifications to ensure the proper installation of both grout and sealer.