Is noncomedogenic a guarantee I will not break out?

It is a useful label to consider, but I would not promise that an individual product will suit everyone. Use the label as one clue, then judge the actual formula by what your skin does with repeated use.

Noncomedogenic is a clue, not a guarantee

Your reaction to the finished product matters. If bumps appear after a change, review the timing and the rest of the routine rather than relying on the label alone.