If doing an outdoor project and rain is forecasted, can I cover the area with plastic to protect the grout from rain? During wet conditions will the drying period be extended?
No, QuartzLock Grout is an air-dried product that must be protected from rain or moisture for 7 days. Covering the grout directly with plastic during this time will interfere with the drying process. If rain is forecast within 7 days, protect surface by tenting the grouted area (at least 1 foot above tile surface). Humid conditions may slow the drying time slightly, so test the grout joints for full cure before allowing foot traffic.