Operation of the vehicle should be avoided for at least 24 hours after installing the windshield because the adhesive needs time to cure and this affects its use during an accident. Before putting anything in the car, partially drop down the glass in both doors to make certain the passenger compartment doesn't get pressurized if a door is slammed shut. Should you reuse the windshield, use a razor knife to take most of the old urethane off the glass so you do not scratch the painted area on the fence. Wipe away most of the old urethane adhesive from the windshield fence, making sure there are at least 1 mm left for proper bonding and put in any support spacers that are missing or damaged. Once you have evened out the top urethane level on the windshield fence, use new adhesive backed spacers where you need to. Install a rubber seal on the sides of the windshield, then slide the windshield into the opening between the fence posts and spacers so that it's even. Plot the fence shape and the windshield on the old car to use as a guide, then set the windshield on a thick and soft surface while you work. Wipe the inside of the windshield with ammonia glass cleaner and a clean, lintless cloth and then do the same with glass prep adhesion promoter, wiping clean until there are no streaks. After, use glass primer and cover the perimeter on both sides, allowing it to dry for about three minutes and confirming the spread is even with a flashlight before going over any uneven parts again. Use an ammonia-based windshield cleaner to clean the windshield fence, then cover the fence with pinch weld primer 15 mm wide and let it sit for three minutes before checking so you can see if it's even. Insert a 10 mm wide bead of glue just 6 mm from the glass border at the midpoint with a triangular applicator and press the ends to make them level. Put the windshield over the opening, matching the marks you made and bring it down slowly so the rubber seals fit right. Pull the windshield backward so it touches the spacers and next put on the cowl grill and rear view mirror.