Philly sorry for the delayed response....
That is petroleum jelly. The stuff works great. But yea, I use di-electrical grease as well.
The black bead is Permatex High temp silicon gasket maker. Used primarily in automotive, I apply it for a permanent seal. It's water tight and stand up to the cold really well too.
Quote:
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OEM specified. For dealership warranty requirements, Ultra BlackŪ ensures extended drivetrain warranty compliance. Fast-curing formula. Sensor-safe, low odor, noncorrosive. Meets performance specs of OE silicone gaskets. Retains high flexibility, oil resistant properties through use of a patented adhesion system. Temperature range -65°F to 500°F (-54°C to 260°C) intermittent; resists auto and shop fluids and vibration.
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http://www.permatex.com/products/pro...t-maker-detail