do pay attention to the "expiration" date on them - if you use it and then it dries it's ok, but if you keep it - even unopened for years and then try to use it ... I would not feel safe about it
GE 1 is ok just be sure you let it cure for at least a week with the tank laying on its side so the fumes do not get trapped. I have had issues with it in the past trying to rush things just because it looks and feels dry dose not mean its cured and tank safe