Setting Sand Trumps Mortar

Instead of filling large gaps in a flagstone patio with mortar, this new jointing sand hardens when you mist it with water. It won't set up as hard as cement, but it's plenty firm enough to hold your pavers in place, and it can fill gaps up to 2 inches wide between pavers, brick, or cement slabs. Sweep it into the cracks, wet it down, and—just like that—you have solid joints that resist erosion, weeds, and insects.

About $18 for a 50-pound sack.

HardScapes Polymeric Jointing Sand, by QuikreteAround
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