The windshield's seal is the adhesive used to attach it to the body frame, or pinchweld. It was installed with butyl at the factory.

Many confuse the seal with the rubber trim that covers the gap once the window is installed. This trim changed in 1991 from an aluminum/rubber piece attached to the glass with plastic clips to an all-rubber piece glued on to the glass. That '91 change is the only difference your '93 has from earlier 240's back to '78. The glass is the same.

If you order a windshield to do the job yourself, assuming you might in order to take care of any rust in the pinchweld, you have the option of re-installing with a butyl rubber strip.

However, if you ask a professional to do the install, you'll get polyurethane. If you go that route, watch them; make sure they clean all the old butyl out before using the urethane.

If you want to scroll through some pics, look here

http://cleanflametrap.com/windshield.html
--
Art Benstein near Baltimore

Q. What do bulletproof vests, fire escapes, windshield wipers, and laser printers all have in common?

A. All invented by WOMEN!