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How do you best remove tile grout and mortar from a concrete slab and are there any possible structural difficulties because it's in an apartment block?
Wiki User
∙ 14y ago
Phosphoric Acid will do the trick, it etches the concrete and when it is cleaned away with plain water, it takes away the dirt and the other offending materials. Remember, this acid is strong and although it does not froth, it will do it's job, gently but, firmly. The longer you leave it, the harder it will work.
Wiki User
∙ 14y ago
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