The windshield should only be used after waiting at least 24 hours for the urethane to settle. To avoid water leaks from pressing the passenger compartment, roll the front door glass down and open the rear slider glass if it is available. Apply a rigid plastic object along the windshield edge and remove most of the old bonding material, making sure to keep 1-2 mm intact, since this affects the paint and the way things join. Add support spacers where they are missing or damaged in the bottom part of the opening between the windshield and lower cowl. On a windshield that is not new, shave the old bead of adhesive to about one millimeter (0.04 inches) and remove any loose pieces. Install new spacers along the tops of the glass and place the lower spacer assemblies into the empty holes. Line up the windshield (1) so it is centered in the opening, supported by the side and lower spacers (2 & 3) and look at the spacers near the bottom (3) to ensure there is no more than the allowed roof gap between the top of the car and the windshield. Put tape around the windshield (1) for help with fixing and to check whether the gap is straight, cut the tape afterward and finally remove the windshield. Using a rag and solvent, clean and dry the part of glass (2) you are gluing and check the primer; if it is damaged, re-apply primer to the damaged spots. Coat the outside edge of the glass with primer (1) to a width of 15 mm (0.5 in.) (2) and let it dry for up to 10 minutes. For a fresh windshield, set the upper spacers in the upper glass edge (1), let the A-pillar spacers touch the glass (2) and lock the lower spacers (1) into the windshield channels from below. Put the windshield (2) in the middle of the opening, add adhesive tape, check that the gap is parallel and finally cut and remove the windshield after the tape. Clean and dry the area around the windshield, put primer on the surface you will be gluing and let it air dry for about 10 minutes. Slide the vacuum nozzle between the window and the seal to clean the inside of the area, flatten the old glue and rub down the around where you will place the new adhesive. For damaged areas, put on another thin coat of primer and air dry it for at least 10 minutes. Right in the center of the windshield, make sure to put a 9.5 mm wide and 12.7 mm high bead of sealant (7) from the material. Find the adhesive bead at the center and underside of the primed windshield (2), press the ends down and use the tape to guide the windshield in as you lift it into place. Position the windshield gently and let someone add the pressure to hold it in place; make sure only one hand is used for safety. The last step is to put in the cowl panel and the rear view mirror.