Flywheel to crank bolt size

I just did ARP on a crank and flex plate/ TQ - same bolts for both on my application.
They use a special grease not loc-tite.
I spoke to the guy at ARP and he said “if you use their bolts, do not expect the same levels of confidence with loc-tite.” Now, does any one know why?
Sorry Steve, didn’t mean to steal the thread. I figured we were past that answer you needed and a good place to ask since ARP bolts have been mentioned.
Syleng1