
I drive a concrete mixer and it cleans concrete quite well, but I need something that can be left overnight. After using a gallon, I found that it causes a lot of "rusting" if left for a long time. The bare metal on my $250,000 cement mixer looks rusty, dirty, and old overnight. :( . Overall, this product does a good job of removing concrete settings, but that's not what I'm looking for.

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