Yep .. it's grey & remains pliable when cured. Good stuff!
Most of the carbs I do are either Mikunis or Keihins. Even 20 year old gaskets on those won't leak even with no sealer - pretty amazing.
I use Honda carb cleaner with a welding tip cleaner kit to get inside even the smallest pilot jets. If they don't run when I'm done, it either needs head work, a rebuild, or ignition work.
That carb cleaner isn't what it used to be -- when it had methylene chloride back in the day, the stuff would instantly strip paint, & make a carb clean a 30 second job. Now it takes a little more effort ... thanks to the you-know-whos ...