Thread: Efflorescence
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Unread 01-23-2020, 11:42 PM   #4
Tool Guy - Kg
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Location: Oak Creek, WI
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Grout is pretty weak when it’s fresh. Generally, the directions want you to let grout cure for about a week before you expose it to acid. Have you tried the same product again over a small test spot to see if there’s an improvement?

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