use one that meets all specifications for outdoor use (the label includes this information). The same goes for sanded grout; look for an exterior-grade grout. Ask the tile store for ...

Choosing your grout color might seem like a minor design decision, but a certain hue can actually hide some dangerous hazards ...

For use inside or out on a variety of surfaces including sanded grout, ceramic tile, porcelain tile, glazed tile, stucco, travertine, marble, slate, granite, terrazzo and more to protect against ...