In prepping for a long trip I crawled under the RV and saw some screw that had popped through the thermal cover down there, causing the cover to sag in places. The small washers originally installed ...
From what I understand there aren't any good patches for this, they do make plastic welding rods (using same type as tank) that can make permanent repairs or "spin weld" a patch over it. Welding will of course will require tank removal.
Dan
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