Well Known Member
Even stainless-depending on the grade, can be rusty junk in a few years. Regarding rusting rebar, from my own experience and from closely watching construction in Mexico most rebar is rusty before it enters the walls. Somewhere on this site we discussed methods to relieve the rusty rebar problem and in some projects in the U.S. Teflon coated rebar is used. I have also seen fiberglass rebar which is pretty rare.