I.T. supplies the suit and tape for assembling the suit. In the show, the new mayor mentions multiple times how upset he was that mechanical stole their tape. I feel like Juliet only mentioned once that she found out that the tape from I.T. was really poor quality and therefore of no use to Juliet for important mechanical needs. We were supposed to notice the tape was used on the seals of the suit where the gloves and shoes meet the suit. We were supposed to surmise that the shitty I.T. tape made the suits fail far earlier than they should. Juliet's friend from mechanical somehow figured that out and got supply to do a switcheroo and send the high quality mechanical tape to I.T. so when they make Juliet's suit she isn't prematurely exposed to the hazard outside and could therefore make it past the ridge.

I think the books did a much better job of explaining this and of course a totally different route to get to this point, but all books are more detailed than visual adaptations.