Aeroshell is a di-ester based grease, and I think uses a modified clay based thickener, it's definitely not lithium based.
I think it's discontinued now, (replaced with Aeroshell 33MS ??) and FWIW I'd use CAT Desert Gold grease instead.
You can get it from Westrac.
This is a synthetic oil (PAO) based grease with 5% moly and is calcium sulphonate thickened, so resists rust and water washout extremely well.