How long should caulking hold up before redoing it?

donn0128 wrote:
Dicor markets two versions. One for verticle and another for horizontal surfaces. I have tried ProFlex and it did not work for me. Redid with Dicor and it worked fine.

That's strange. I used the Dicor for horizontal (no sag) and it didn't last nearly bas long as the Proflex. Maybe I got some bad Dicor?

I did notice that the Dicor seemed to really pick up dust/dirt/mold badly...and turns dark after a year or so where the Proflex seems to still be white.