I also called Aqueon (formerly All Glass) and they actually manufacture their own silicone in caulk gun sized tubes. The item number is 65010 for the clear, they don't do direct sales so they don't have a price. (of course.)
However I brought up my conversation with GE to them, and they said that
ammonia will leech during the curing process of ANY 100% silicone product, but they become inert after cured. Crap man, I never had a clue that such a simple question had such a complex answer!
