I just got a call from a customer that needs a railing repaired because it broke off at the concrete, no big deal I've fixed and reinstalled many just like it. What's new about this one is I've never reset any when it's 0 outside and I'm not sure what to use. In the past I've always used por-rok type cement but I don't think it will work in this cold. Anybody have experience or suggestions? I offered to set up a temp railing and wait till warmer weather but if it can be done properly now I'd like to help him out.