Is 3M's All-Around Autobody Sealant 08500 a good candidate to replace the gray sealer that is used in the interior compartment between metal panels that are screwed in place (not welded in place) ? The carpeted kick panels as well as the rear window access panels are a couple of places where the factory used this type of material. The original material is a gray, non-hardening, putty that can fill large voids. The Fisher Body Manual refers to this material as "non-hardening body sealer." It's NOT black, tacky strip caulk, and it's NOT brush-able seam sealer for welded seams that hardens as it cures. Remember, interior sealers need to be odor-free which the 3M product that I mention is.
Yes, 3M's All-Around Autobody Sealant 08500 works well to replace the gray sealer that is used in the interior compartment. It uses a water-based solvent, so as to avoid having undesirable odors in the passenger compartment. It's gray-white, remains flexible, and can fill large voids. According to the Product Information Guide, it will shrink 34% when completely dry, so be sure to apply accordingly.