How do you clean colored sealed concrete?
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I have a coloured sealed stamped patio area outside approx 8 months old. The bricks on the wall of the house I believe have created calcium deposits/efflorescence over the concrete, my question is how can I clean this off without damaging the Finnish of the concrete, I can;t find much info online about deposits created outside of the concrete sealing.
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A 50/50 mix of vinegar and water should clean it off. Also use it on the brick wall then seal the wall with concrete sealer.
Since it's fairly new, contact the company that installed it and ask what the product they used recommends for cleaning it. That way, you won't void any warranty using the wrong products.
I wouldn't try hydrochloric acid. Way to caustic. What you can try is muriatic acid in a small inconspicuous area. Does etch raw concrete but the stain and sealer may offer some protection.
Yes muriatic acid is an industrial name for hydrocloric acid but has more impurities in it. Be careful in handling it.
If you're just removing mineral deposits (efflorescence), use a much weaker mix (10:1 or 16:1 for muriatic acid).