Urethane Adhesive Installation of Stationary Windows

Important:  Remove all but approximately 2 mm (0.078 in) of the existing bead of urethane adhesive from the pinchweld flange.

1. Remove all mounds or loose pieces of urethane adhesive from the pinchweld area.
2. If the original window is being reused, remove all but a thin film of the existing urethane adhesive from the window surface by using a clean utility knife or razor blade scraper.
3. Inspect the following components for the causes of a broken window:
   • The flange of the window opening
   • The window reveal molding
4. Inspect for any of the following problems in order to help prevent future breakage of the window:
   • High weld
   • Solder spots
   • Hardened sealer
   • Any other obstruction or irregularity in the pinchweld flange

   Important:  If corrosion of the pinchweld flange is present or if sheet metal repairs or replacements are required, the pinchweld flange must be refinished in order to restore the bonding area strength. If paint repairs are required, mask the flange bonding area prior to applying the color coat in order to provide a clean primer only surface. Materials such as BASF DE17®, DuPont 2610®, Sherwin-Williams PSE 4600 and NP70® and Martin-Semour 5120 and 5130® PPG DP90LF SPIES/HECKER 3688/8590 - 3688/5150 - 4070/5090 STANDOX 11158/13320 -14653/14980 products are approved for this application.

5. After repairing the opening as indicated, perform the following steps:
   1. 5.1. Remove all traces of broken glass from the outer cowl panel, seats, floor and defroster ducts.
   2. 5.2. Clean around the edge of the inside surface of the window with a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth.
   3. 5.3. Allow the isopropyl alcohol to dry completely before applying the primers.
   WARNING: Refer to WINDOW RETENTION CAUTION .
6. Verify all primers and urethane adhesive are within expiration dates.
   WARNING: Failure to prep the area prior to the application of primer may cause insufficient bonding of urethane adhesive. Insufficient bonding of urethane adhesive may allow unrestrained occupants to be ejected from vehicle resulting in personal injury.

   Important:  Do not apply the (black #3) primer to the existing bead (1) of the urethane adhesive on the pinchweld flange. Apply the primer only to nicks, scratches or the primed surfaces.

7. Shake the pinchweld primer (black #3) for at least 1 minute.
8. Use a new dauber in order to apply the primer to the surface of the pinchweld flange (1).
9. Allow the pinchweld primer to dry for approximately 10 minutes.
   Fig 1: Applying Primer To Pinchweld Flange Surface

   Courtesy of GENERAL MOTORS CORP.
10. If installing a windshield (1), install the spacers (2) as needed and the VIN plate filler strip, if equipped.
    Fig 2: Installing Spacers & Windshield

    Courtesy of GENERAL MOTORS CORP.
11. Install the new windshield acoustic strip (1) to the windshield (2), if equipped or damaged.

    The acoustic strip aids in reducing noise.

    Fig 3: Installing Windshield Acoustic Strip

    Courtesy of GENERAL MOTORS CORP.
12. If installing a new window reveal molding starting in the center and work toward each end pressing firmly in to place.
    Fig 4: Installing Window Reveal Molding

    Courtesy of GENERAL MOTORS CORP.
13. With the aid of an assistant dry fit the window (1) to the opening.
14. Center the glass side to side (2) into the body opening.
    Fig 5: Fitting Window Into Body Opening

    Courtesy of GENERAL MOTORS CORP.
15. Use masking tape in order to mark the locations (1,2) of the window (3) in the opening.
16. Cut the masking in the center and remove the window from the opening.
    Fig 6: Marking Locations Of Window In Opening

    Courtesy of GENERAL MOTORS CORP.

    Important:  Use care when applying glass prep (clear #1) on the window. This primer dries almost instantly, and may stain the viewing area of the window if not applied evenly.

17. Use a new dauber in order to apply glass prep (clear #1) to the area approximately 10-16 mm (3/8 - 5/8 in) around the entire perimeter of the window inner surface.

    Immediately wipe the glass primed area using a clean, lint-free cloth.

    Fig 7: Applying Glass Prep On Window Inner Surface

    Courtesy of GENERAL MOTORS CORP.

    Important:  The glass primer (black #2) is effective up to 8 hours after applying it to the glass. The primed surface of the glass must be kept clean.

18. Shake the glass primer (black #2) for at least 1 minute.
19. Use a new dauber in order to apply the glass primer (black #2) to the same areas (2) that glass prep (clear #1) was applied.
20. Allow the glass primer to dry for approximately 10 minutes.
    Fig 8: Applying Glass Primer On Window Inner Surface

    Courtesy of GENERAL MOTORS CORP.

    Important:  From the bottom edge of the window inboard (4), measure a distance of 14 - 17 mm to apply the urethane bead (1).

    On the sides and the top edge of the glass, measure a distance of 4 - 7 mm (2) from the inside edge of the reveal molding (3).

21. Use the measurements as a guide to apply the urethane adhesive bead to the blackout area of the window.
    Fig 9: Measuring Distances To Apply Urethane Bead

    Courtesy of GENERAL MOTORS CORP.
22. Cut the applicator nozzle in order to provide a bead of 10 mm (0.393 in) wide and 15 mm (0.590 in) high.
23. Use a cartridge-type caulking gun in order to apply a smooth, continuous bead of urethane adhesive to 4 - 7 mm (0.157 - 0.276 in) inward from the inside edge of the reveal molding.
    Fig 10: Applying Urethane Adhesive To Reveal Molding

    Courtesy of GENERAL MOTORS CORP.

    Important:  The window must be installed to the window opening within 5 minutes after the urethane adhesive is dispensed.

24. Use the previous measurements of 14 - 17 mm (0.551 - 0.669 in) from the bottom edge of the window and 4 - 7 mm (0.157 - 0.276 in) from the inside edge of the reveal molding as a guide for the nozzle in order to apply the urethane adhesive (1) to the inner surface of the window (3).
    Fig 11: Applying Urethane Adhesive To Inner Surface Of Window

    Courtesy of GENERAL MOTORS CORP.
25. With the aid of an assistant, place the window in the opening.
26. If installing a windshield, place the windshield on the lower supports (2).
    Fig 12: Placing Windshield On Lower Supports

    Courtesy of GENERAL MOTORS CORP.
27. Align the masking tape (1,2) on the window (3) to the body tape in order to align the glass.
    Fig 13: Aligning Masking Tape On Window

    Courtesy of GENERAL MOTORS CORP.
28. Press the window around the entire periphery of the glass edge in order to wet-out the urethane adhesive.
29. Tape the window to the body in order to minimize movement until the urethane adhesive cures.
    Fig 14: Pressing Window Around Glass Edge

    Courtesy of GENERAL MOTORS CORP.
30. Clean any excess urethane adhesive from the body using VM&P Naptha.
31. Clean any excess urethane adhesive from the interior trim using acrysol.
    Fig 15: Cleaning Excess Urethane Adhesive

    Courtesy of GENERAL MOTORS CORP.

    Important:  Do not direct a hard stream of high pressure water to the freshly applied urethane adhesive.

32. Use a soft spray of warm water in order to immediately water test the window.
33. Inspect the window for leaks.
34. If any leaks are found, use a plastic paddle in order to apply extra urethane adhesive at the leak point.
35. Retest the window for leaks.
    Fig 16: Testing Window For Leaks

    Courtesy of GENERAL MOTORS CORP.