It is a two part epoxy. It comes in two small cans and is somewhat "grainey", but will stay in place unlike JB weld. It is found at most hardware stores and home repair outlets. It has been around for years.What is PC-7,other than what you use to repair steering wheels ?What's its content?Sounds like some good stuff.
I just Googled it .It says you can use it on plumbing leaks.Maybe I should just buy 2 or 3 cans and rid my van of all the plumbing parts I carry in it .Been doing it all wrong for 42 years.