Thanks so much guys. There are some good ideas here.
Ian Hobbis, I have to admit that I do not know what Evergreen rectangular bar is. When I was in Argentina a couple of years ago, I needed some JB Weld. There was absolutely no finding it. So I tried some epoxy that carried some brand name in Spanish that gave no clue to its make up. So I took a chance and, sure enough, when I opened it up it was the exact same thing as JB Weld. So maybe we have an American equivalent.
Ok, I'm SO embarrassed. I googled Evergreen rectangular bar and Hey!! It's regular styrene. Que Verguenza!