Apparently, Rubber molds have a shelf life.
Half way through the casting of the street lamps needed for Grand Ave, the rubber mold decides to completely fail.
Now it could be I didn't use enough release agent. But the mold also cracked (Maybe the sun got to it? UV rays are so destructive!). So I'm sure its at the end of its shelf life.
So the next time I make a mold, I have got to make all the casting right away.
Yes sir- Right away!