Voltage regulator question

[JH27N0B]

In June I took my convertible to a cruise about 45 minutes away. While there ran into another member here with a convertible same colors as mine and we were admiring each other's cars. He pointed out on mine that there was something oozing down my firewall from the voltage regulator.  The car made it home fine with no symptoms and I had a couple spare voltage regulators in my stash, so I put another one in.
Before I did, I'd set it on my desk and when I picked it up a pen was sticking on the back, I didn't realize the rear was filled with a sealant that is a bit soft.
I've driven the car off and on since that, maybe 200-250 miles, and last weekend went to a show.  After getting home I noticed a little bit of stuff had oozed down from the new regulator.
I looked online and all I found was an old thread on moparts that said the epoxy in the back gets old and soft with age and susceptible to melting.
Is my voltage regulator overheating and if so what might cause that?

[70vert]

was your stash regulator a NOS, maybe suffers the same issue as the one you had on it. Although I know that the backside has an epoxy filling I've never had one melt on me and I'd think you'd have other issues if was getting hot enough to melt it. most likely just old.

[mopar jack]

The regulators use some kind of hard gel same as the ecu. I have had a couple melt and stick to every thing.

[Chryco Psycho]

In my truck which used the same regulators I had to replace them yearly as the sealer would shrink & they would fill with water from behind & burn out .
nothing lasts forever & I doubt heat was the main issue .