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Unread 08-31-2020, 02:53 PM   #2
Tiger Mountain Tile Inc
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Join Date: Feb 2011
Location: Issaquah, Washington
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I think it should be fixed prior to tiling. However, you don't want to fix it with the 4:1. I'm thinking something like Ardex Feather Finish might be your best bet in that scenario but I don't remember if it's OK for wet areas. I think it's Planipatch they don't want you using in wet areas.

You might call Mapei and see what their solution is. Planipatch is their product and that way you're keeping everything in-brand.
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