Weird looking sealer stuff

[Icedawg]

So with the end of the ice racing season I am going to have to do some body work.
The driver side rear quarter panel was punched in by a VW Scirrocco, when we all took to a snow bank to avoid destroying our cars on a stranded Chevette.



But what is this weird stuff hanging our of the seam between the quarter panel and the wheel well? It seems to be a cork impregnated rubber compound intended to seal the outside edge of the panel to the steel of the wheel well enclosure?
Weird stuff, I never expected to find this as part of the rear fender.

[WmWatt]

Yeah, they put foam in there. Problem is it traps moisture from condensation and body panel rusts from inside. People on here have reported it is a popular spot for body rust. I pop the rubber plug and spray oil in there once a year.

[william]

Yeah it's some kind or seam sealer but it''s like open cell foam . Soaks up moisture and makes that seam rust out. I've had them where there just started to rust and that stuff would squeeze out water if you poke it with a screw driver.