The design of today's cars and trucks make their windshields and backlites integral parts of the vehicle's overall structural strength. The safety of the occupants partially depend on these components. The replacement of urethane-set auto glass requires these parts be installed with the proper materials to maintain the *OEM design criteria for strength and rigidity.

CURING NOTES: Humidity and heat are needed for all one-part urethane sealants to cure. Humidity is the most important factor as the humidity and the greater the heat, the faster the urethane will cure. The lower the humidity and the colder the temperature, the slower the urethane will cure.

*OEM specifications call for certain late model vehicles to have windshields and model vehicles to have windshields and backlites mounted with Butyl. We advise urethane to used in addition as up to 18% of the structural integrity relies on the windshield.

How we replace windshields

1. First remove the surrounding molding. Cut out windshield with cold or power knife, or wire.
2. Remove all of old urethane down to the pinchweld. Clean pinchweld with G.P. Solvent. Remove debris from bare or rust spots and prime them with Urethane Pinchweld Primer.
3. Place replacement glass into opening. Align for fit and reposition setting blocks (if necessary). Mark position by applying a few short strips of auto body masking tape across gap between glass edge and body. Slit tape at glass edge and remove glass.
4. Clean inside glass surface with Alcohol Free Glass Cleaner, then apply a coat of Cleaner/Conditioner to the windshield bond area to promote maximum adhesion. Allow to dry five minutes before installation.
5. Apply Dam Tape to the inside of the pinchweld allowing a minimum Ľ" bit for the urethane on the pinchweld. Never apply dam tape to the windshield.
6. Cut nozzle to desired bead size; puncture inner sealant base of nozzle; insert in standard cartridge caulking gun.
7. Apply a bead of urethane behind the dam tape around the entire perimeter. Optimum application temperature range should be observed per sealant specifications. Make sure application surface is frost-free.
8. Firmly place glass on lower setting blocks and align tape ends on glass and body. Be sure complete contact is made with dam tape and the urethane.
9. Tool urethane around edge of glass. Backfill with urethane if necessary.
10. Replace windshield molding and remaining parts. Clean excess urethane with G.P. Solvent. Clean glass with Alcohol Free Glass Cleaner.
11. Allow urethane adequate time to cure sufficiently to hold windshield before driving vehicle. Do not slam doors with windows shut.
12. Vinyl tape (if needed) must be used on mouldings as Masking/Crepe tapes leave residue.