Reaching for rock salt the second it gets icy? On concrete, that’s an expensive habit. Here’s what it does, and what to use instead.
Why salt wrecks concrete
Rock salt makes water refreeze and thaw more often, and each freeze-thaw cycle flakes the surface apart (scaling and spalling). The chloride also soaks in and corrodes the rebar underneath. New concrete (under a year old) should never see de-icing salt.
What to use instead
Calcium magnesium acetate (CMA) and “concrete-safe / pet-safe” blends are gentlest; plain sand adds traction with zero damage; calcium chloride works in a pinch on older, sealed concrete.
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If you already used salt
Rinse the concrete well in spring to flush the chloride, then apply a penetrating sealer before next winter.
Pouring or patching concrete?
Figure the bags or yards you need with the free Concrete Calculator.