I used to see that TW25B grease slathered on NIB SIG's many years ago, and back when I took my SIG armorer class (Classic) they said all their guns came with it applied. Maybe they're still doing it?
Anyway, I called the Mil-Comm folks to ask about getting some samples of their products for our agency range, and asked about it. They put someone on the phone who said he was a chemist, and one of the interesting things he said was that when you applied it to the guns, and rubbed it around the areas you wanted lubed, if you could still see the white color afterward, you'd applied too much. Always had good luck with it. They also sent us some samples of their oil.