Do I use a glue or a thinset to adhere the old tiles back to the new wall?

Thinset

Are you talking about resetting a tile that popped loose or are you tiling a new wall with recycled old tiles?

Do I use a glue or a thinset to adhere the old tiles back to the new wall?
Thinset

Still waiting to hear an answer about what you are doing, it makes a difference.

Ballenger

Sorry I went on vacation

To install a new shower unit I had to remove the old tile install the unit sheetrock the wall and now I want to reuse the old tile

thinset

Thanks
I can get that pre mixed right?