The roof on a 96 Pace is EPDM rubber (I had one like it). You can seal any roof seam or opening with an EPDM-compatible lap sealant, e.g. Dicor Lap sealant.
Re-coating it is needed only if the surface was worn away, i.e. you can see the woven black backing. It would not be surprising if that had happened by now on a 96, but there are some that are still in good shape. Recoat with a liquid EPDM product like Liquid Roof, Koolseal RV, etc. Repair all seams and opening with Dicor lap sealant first.
2004 American Tradition; 2013 Buick Verano
Homebase in the Ocala Nat'l Forest near Ocala, FL