Do not use your car for 24 hours after the windshield is installed because the urethane adhesive still needs to cure properly for the windshield to perform right in an accident. Roll down the left and right door glass by half before installing, so slippage is prevented if a door is slammed. Don't let urethane or primers contact painted and trimmed areas. If using the old windshield, use a razor knife to remove most of the original urethane, so you don't accidently damage the paint on the surrounding molding. Cut away most of the old urethane putty from the windshield fence, leaving about 1 mm and fix any spacers that are not there or have come off. The original urethane bead on the windshield fence should be smoothed until it's about 1 mm thick and you can put in any additional adhesive backed spacers as needed. Add a new rubber seal on top of the windshield, then set it gently into the opening against the fence and the spacers to see that it's even. Stamp your mark on the windshield and fence to remember where they are, after which remove the windshield and set it down padded side facing up. Use ammonia-based glass cleaner and a cloth that doesn't leave lint to clean the windshield. Apply a glass prep adhesion promoter around the edges and wipe dry with a clean cloth. After the border, add glass primer, leave it for at least three minutes and check that the glass is evenly primed with a flashlight. If it isn't, apply another coat of primer. Clear the windshield fence with ammonia-based glass cleaner and then put pinch weld primer around it, checking that it's evenly spread. Squeeze a 10 mm wide beam of glue with a triangular nozzle 6 mm away from the glass's edge, starting in the bottom center, then smooth the end joints. Set the windshield above the opening, adjust it to fit with the marks and lower it down so that the spacers are pressed lightly against the glass. After that, install the cowl grill, rear view mirror and rain sensor module onto the windshield.