Looked this up this morning on the Sebring club as last night I couldn't remember what people had success with. Both Titan PG2 and Rhino blue have been used with very good results.
Titan
Amazon.com: Sika Titan P2G Auto Gass Windshield Urethane Primerless Adhesive Glue Sealant: Automotive
Rhino
Rhino Glue - - Amazon.com
