I once used regular 2-part epoxy of the type sold in small tubes in a
variety store. It was visible but inconspicuous and did the job well.

Tom, N3IJ

"Argus" wrote in message
hlink.net...
Gentlemen:

Can anyone tell me what the tube manufacturers used to cement the plate
caps
to the tube envelope?

Thanks-for-reading

Prof. R. Long
Ivy Tech State College