I work for the Co. who supplies over 90% of the adhesive used to install automotive glass worldwide. Believe it or not this is a critical issue - the windshield is in fact a structural member and the adhesive is carefully formulated to adhere to the specific combination of paint / clearcoat / glass on every specific vehcile. Replacement glass is sold as a kit with the windshield plus correct adhesive. You can DIY but make certain you buy the specified kit including the adhesive from a reputable source.

Jeff
96 T100 SR5 4WD Ext Cab, Warn Hubs, HD torsion bars, Bilsteins, Camper Shell, TJM bar, factory 31 x 10.5's, Powertrax No-slip rear, Recaro driver's bucket