3M brand windshield to channel adhesive. This is what is used for installing the windshields on 69-73 Cougars and Mustangs, all of which did not use a windshield gasket. This is a 10oz tube. This is the industry recommended glass installation adhesive for the gasketless windshields. However, our classic Cougars were assembled using a less hardening bonding agent, that allowed some glass movement.