I have an oem flip armrest that cracked near the hinge. I sealed it with jbweld and Krazy glue. It's not beautiful on the inside but the actual armrest piece and the piece that attaches to the center console are perfect.
https://www.dropbox.com/s/ldqopkds61...%2034.jpg?dl=0
https://www.dropbox.com/s/500zjex97s...%2006.jpg?dl=0