How we Replace a Windshield in 15 Steps
(sometimes more) layman terms
Use hand tools to remove the rear view mirror and any hardware attached to the old windshield.
Remove the wiper blades, windshield gasket and plastic molding around the windshield perimeter and cowl. . (may differ on each vehicle - see moldings)
Separate the windshield from the pinch weld with a cold knife and or extractor knife on some vehicle
Use a cold knife to cut the urethane seal around the perimeter of the windshield.
Remove the old windshield. Be careful not to damage the paint or bonding surface. (remove any stickers that the customer may want or need to be replaced. )
Now you should have an empty windshield frame. Use a razor blade scraper to remove as much of the old urethane as possible. Be careful not to scratch the paint or the bonding surface. Don’t worry if you can’t remove all the old urethane, a thin layer helps the new urethane form a stronger bond. Remove any rust spots with sandpaper or a wire brush to prevent it from spreading.
Clean up the bonding surface with a stiff nylon brush to remove any loose particles. Vacuum any debris around the area and clean up your work area before continuing.
Use pure alcohol 99% to clean the new windshield perimeter where the urethane will contact it.to remove any silicone ect for a clean install.
Body primmer is now installed and let to dry per manufactures directions.
Lay a continuous and even bead of urethane around the perimeter of the windshield frame.
An electric or air powered caulk gun makes this job a lot easier.
Fill any gaps in the urethane bead before you continue.
Install the windshield as soon as possible to prevent the urethane from curing before installation.
Use suction cup window holders to lower the new windshield into place.
Position the windshield in the correct spot.
Use tape to hold the windshield in place and prevent it from sliding around while the urethane cures.
Allow the urethane to cure for the allotted time specified by the manufacturer.
Reinstall the windshield cowl. wipers and any body molding and/or plastic molding, rear view mirror and any hardware you removed.
If necessary, take the car to a dealer to have the ADAS calibrated.