junction between PV cables and THWN in conduit

[RShackleford]

You're right. GE Silicone II appears to be neutral cure. They refer to it as GE Silicone 2+ below, but I think that's the same thing. Great to know. Thank you.
https://www.gesealants.com/Frequentl...questions.aspx

I didn't try to use the Silicon2 on wirenuts, rest assured.

However, I did try to use an old tube of it for something else, and it was a rude shock. It never cured, and just turned into this nasty black grease. I complained to GE and they basically said "tough titty, it's only guaranteed for 3 years". Evidently the catalyst that causes curing wears out.

[bob-n]

Yes, I learned that lesson the hard way, too. Undried silicone is a yucky mess.