First off, get the German-made seals. Bus Depot sells both the generic and the German and they go through pains to tell you why it’s a good idea to spring for the better ones, but you may still be tempted to save a few bucks. If this is you, then you either shouldn’t own a Bus or you haven’t learned the hard lessons yet. Water inside your vehicle is a killer. Buy the good door seals.
Full disclosure: The price difference is substantial. Generic door seals are $20 each whereas the German ones are $90 a pop. So, yes, it is an investment. But that’s the way to look at it—investing in the thing that is going to help seal out moisture.
Installing them is easy enough. Scrape out the old ones and any excess glue. This will take some elbow grease and mineral spirits. I used a flathead screwdriver to scour out the glue. When you’re ready to install the new seals, apply the adhesive, double check everything and slam those doors shut tight. Let sit overnight to cure. Since I replaced the seals, I’ve had zero door leaks. Now I am going to go knock on wood—my hardwood floors (which have remained perfectly dry, mind you).