In the past, I have mesh taped cement board with thinset. Is it okay to do it with mastic instead? The reason I would prefer it is to avoid mixing thinset in my own tub, as opposed to the container the mastic is sold in the store and I just throw away, vs cleaning the tools after thinset, which is hell.
Tape cement board with mastic instead of mortar
cement-boardthinset
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Best Answer
It doesn't matter.
Waterproofing is behind tape example:
Waterproofing over the tape:
The real answer is you are putting too much thinset on. Like I said - just enough to hide behind tape, not the tape. The rest of the thinset that splattered should be scraped with putty knife and then wiped with wet towel immediately. Big shower is 3 minutes clean up after taping if that.