Anyone use or have luck with stuff like AC Pro Super seal. It claims to seal some small metal line leaks. I have been working on adding AC to my 79 Chevy truck and wouldn't you know it the only part that is not new the evaporator is leaking. I bought one of those AC detectors that beep when a leak is detected and it seems evap is bad. The evaporator was an aftermarket A-R-A kit that added AC to trucks that only came with heat from the factory. ARA is no longer around so I can not just order a new evaporator and install. The evaporator was a bear to get it to fit behind the dash, I think it is leaking behind one of the cooper coil bends. I will probably have to remove it and see if a radiator shop could repair it or just try and find a different aftermarket evap. I actually made all my own AC lines for this system, what a bummer.