Just an FYI, you have a hybrid Dana 44 which is labeled an m226. This means most things for a Dana 44 like gears and lockers and etc... won't fit without custom modifications that nobody had really done.
I personally wouldn't reccomend standard silicone. No matter how long you let it set up, It will leak, trust me. Been there, done that. Make sure you get a non acid cure type, or ask the dealer what they use.