what sealant did the factory use?

DOMINION SURE SEAL - it comes in black and grey - it's not a 2K product but it will last just as long, if not longer.
I tried it. Twice. It's all cracked up in the drip rails on Vixen. I did it right too. Twice. I'm going to spend the money on a good product next time. I've even recommended the Dominion here before. It went on really easily and looked really good. I cannot recommend it anymore though.