Oh this is not good news to hear!
I also used mastic for the tub surround! Are you guys telling me
my whole surround is likely to loosen and come off the wall
I was advised to use mastic by an old tiling guy who now works for
a large local tile supplier. He appeared to be very knowledgable -
there's always a line of people waiting to get his advice.
The directions on the tub doesn't indicate a problem for this usage.
How bad a situation is this??
Would heating the room with hot air help the curing of the mastic?