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Unread 02-09-2020, 01:57 PM   #9
Tool Guy - Kg
Moderator -- Wisconsin Kitchen & Bath Remodeler
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Join Date: Feb 2005
Location: Oak Creek, WI
Posts: 21,958
Hi, Alex.

Thanks for answering our questions. It helps to understand what we’re up against and certain limitations to our suggested solutions.

Yeah, those unglazed porcelain tiles with a micro-fine rough texture are a bugger to clean grout from if you don’t prepare for it. Some pros will use a grout release (probably what was meant by “sealer” in your research). And others will run a damp sponge over the tiles a few seconds prior to spreading tile in an effort to keep the grout from sticking.

A couple more questions, if I may:
1) How long after grouting did you wait before sponging it off?
2) How long after that did you use a “heavy duty acidic cleaner”?
3) What was the acidic cleaner and please describe your procedure for applying.

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