When it comes to natural cleaning solutions for tough stains, white vinegar is a popular, non-toxic choice. In fact, white vinegar has now become my staple household cleaner that I simply cannot live without.

Beyond cutting through limescale, lifting surface stains, and clearing clogged drains, white vinegar can also be put to good use outdoors to clean mildew off patios.

But if you assume that vinegar can clean stains off your concrete patio or driveway, you might want to think again. Especially if you don’t want to risk damaging the surface — and needing expensive repairs.

I asked the experts if I can use vinegar on concrete, the best way to use it, and safer alternatives. Here’s what they say.

Generally, no — avoid cleaning sealed concrete with vinegar. Since white vinegar is highly acidic, applying it to porous concrete can eat away at the protective seal — leaving the surface rough, uneven, and prone to discoloration over time.

“That acidity can react with the concrete’s surface, gradually dissolving or weakening some of the cement paste that holds the aggregate together,” advises Sofia Martinez, cleaning expert and owner at Sparkly Maid Austin.

In addition to causing corrosion, vinegar can damage concrete in other ways and harm surrounding surfaces it touches.

Acidity can react with the concrete’s surface, gradually dissolving or weakening some of the cement paste

“Vinegar can etch some concrete. Etched areas become porous and absorb stains more easily in the future,” adds Martinez.

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