Can I use hydroban on the shower floor that has PVC liner installed below mud deck?
Will it create mold sandwich?
ps. I have normal drain not a specialized topical drain.
With a 2-part clamping drain, you'd need to carve out a "divot" of mud around the drain so the hydroban can go under the drain's weepholes.
Called "the divot method". I just posted about this on another thread.