Exposing concrete to salt isn’t always a bad thing, especially in the case of a rock salt finish – a traditional and easy method for adding subtle texture and skid resistance to plain or colored concrete. Considered a step above smooth or broom-finished concrete, a salt finish leaves a speckled pattern of shallow indentations on the concrete surface, similar to the appearance of slightly pitted, weathered rock. As the name implies, a salt finish is traditionally achieved with the same course rock salt sold for use in water softeners or as a deicer in winter. Concrete finishers broadcast the salt particles over wet concrete and then press the grains into the surface with a float or roller. After the concrete sets, a power washer is used to wash the salt away, revealing a speckled pattern of shallow indentations left by the dislodged salt particles.
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