I’ve used dielectric grease that looks like that, but it was for a marine outboard application. https://www.youtube.com/watch?v=zhl3bLzgq9A
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In Canada this not ok to use cocking on the lugs you must use nolocks for the compound
looks like lightbulb "grease " or silicone
It’s antioxidant paste. A bit excessive, but totally to code. In fact, it’s required. But that is a whole lot of paste, you don’t need that much.
What code requires an anti-oxidant?
my POCO requires it in their red book:
“Oxide inhibitor shall be used on all connections utilizing aluminum conductors.”
Does that count?
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That works for me, thanks. 
It’s not required by the NEC and wouldn’t apply to the breaker in a panel.
This is so… 
Well, I guess I was technically wrong. The code calls this best practice. Here it is from the National Electrical Installation Standards:
https://www.neca-neis.org/code-question-of-the-day/code-question/cqd-for-3-20-2002
This was back in 2002, so I wouldn’t be surprised if the rules are more stringent today.
Okay, not technically code. Here it is from the horse’s mouth:
https://www.neca-neis.org/code-question-of-the-day/code-question/cqd-for-3-20-2002
Yes, it counts. Public utilities are granted the legal authority to have their own requirements. Those requirements can be the same as other applicable codes, they may be more restrictive, or they may be less restrictive. They also have the right not to connect to any system that does not meet their requirements.
That’s why you have to be very careful about inspectors who talk about what is allowed or required or when something was allowed or required. Most of them mistakenly believe that the National Electrical Code is the ultimate authority. That is almost never true.