I haven't tried it with PET-G, but I have used "Gorilla Glue" [www.gorillatough.com] which seems to match up to its claim: "The water activated polyurethane formula expands into materials to form an incredibly strong bond to virtually anything making Gorilla Glue your solution for almost any project or repair."
It expands while setting, so you do need to clamp the pieces together for a couple of hours.
I have used epoxy, super glue and plastic glues on nGen, which is a pet based plastic. All work, and all seem to work equally well with epoxy probably being the strongest, but all create a stronger bond then the actual strength of the print.
Make sure to prep and clean the surface to be glued.. Superglue is fussy about this
*expensive superglue works better then cheap stuff as well... The gorilla glue brand superglue is great stuff... Have used a few other brands with good success too that I will link when I get a chance
Edited 1 time(s). Last edit at 10/18/2017 03:51PM by Origamib.