Here is what you want to use to seal in the windshield. This is good stuff and will do the job. Once the windshield is in you can then tape off the window to airframe (about 3/8") and use this same stuff to create a calk bead. Looks perfect. This ProSeal is what Cirrus uses to install all windows (beech too)
Take a look in the SM, you can change the rivets to screws on the cuff the holds the windshield in place. Makes it a lot easier to install. I have some photos if you need.
http://www.aircraftspruce.com/catalog/appages/ps890.php