I t looks to me like the factory used different things in different places. Most of the stuff is kind of like a tough silacone product. I found this in the front and rear trunk and the interior. White and consistant.

The longs had some stuff that looked like it expanded. Like a polyurethane foam. Dark black and full of bubbles.

Inside of the doors it appears to have graphite in it. Dark gray and smooth.

It's probably not important but I thought it was curious.

Dave

Play-doh, as far as I can tell on the fender....