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I have efflorescence occurring outside. I don’t like its look and am concerned it might over time damage the integrity of the concrete. What can I do about preventing it (ie painting etc as I’m already aware of reducing standing water) or improving its appearance?
Hi @rc1,
You could try applying a penetrative sealer over the surface to prevent moisture contact with it. I'd suggest a product similar to Crommelin 1L Natural Finish Penetrating Sealer And Water Repellent; it's designed to suppress efflorescence. You'll want to ensure that you scrub off as much of the white salts/minerals residue as possible before applying the sealer, or that look will be trapped beneath.
You'll need to coat the paving, concrete and grout lines with the sealer. Make sure it's one decent coat across the whole lot.
Please let me know if you have any questions.
Mitchell
