Moonroof Metal Trim Seal Adhesive???

[E30 Memorial]

I'm restoring a glass moonroof and had to pull the 2 metal trim pieces that frame the glass. The black adhesive/sealant that adheres the metal trim to the glass seems harder and stronger than silicon like a hard rubber, dry and firm, not tacky, cuts with a razor knife with a fare amount of pressure. Any ideas on what I could use to replace it with?
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Update; Found 3M Window-Weld Super Fast Urethane 08609. Strong adhesion, dries hard and non-tacky

http://3mcollision.com/3m-window-weld-super-fast-urethane-08609-black.html

[the imitator]

Hey another moonroof in the NW, I wonder how many more we have up here.
What I will be doing is calling about 5-10 different automotive glass companies and use what they recommend. I don't want to hop to conclusions using a 3M product, or something that may be a little too VAC friendly, and not adhere long term.

Volvo had a small issue with an adhesive that was a little to green/environment friendly, and had more than just a few report their glass pieces gone flying at freeway speeds.

[AndrewBird]

It's probably butyl tape, but silicone windshield adhesive should work fine.