Homebrew PCBs

What do you glue it to and with what type of glue? The glues used in copper clad board are heat
and expansion tolerant this may be hard to find for use home users. The glue actually melts before
the solder so the copper can expand. This seems to be a hard thing  to do when there is already
thin PCB stock out there. There must be a lot of it out there as PCB manufacturers make millions
of multilayer boards every day. Not easy to find for some reason. I did find the Injectorall link
for a start. http://www.injectorall.com/index.htm
There has to be more sources than that. You can search the world now and it's still hard to find
what you want. Go figure.