A patching cement for exterior use in repairing broken mortar in chimneys, steps, sills, sidewalks, or foundations. It may be applied at temperatures below freezing if cartridge is warmed for gunning. It dries to a hard, tough, weather resistant finish in a natural concrete color. It skins over in a few minutes, and cures in one day or more, depending on thickness of patch. Coverage is 65 ft of 3/16" bead per cartridge.