I found this site because I was researching the quality of some caps I found swollen.
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I would like to add to the list Elcon and JWFDZ capacitors.

Elcon appears to be Taiwanese and JWFDZ I think is Russian.

Purchased two Deaf Bonce car audio amplifiers two years ago, they sat for a year on a shelf before being put to use. One of the amps a few months in started having intermittent turn on issues, the other amp was working just fine. Finally pulled them both and opened up for inspection, I found three of the JWFDZ caps on the power supply side swollen,...