PCC
Peter
I purchased some and sprayed it in...
Calculated the area I needed to fill and sprayed some in a 1/4" hole.
Well this morning I went out and there's about four foot of foam like a garden hose in the boot. So it certainly expands..
Looks like I did a spot on job..
Glad I didn't over spray fill/it in. I would have blown the side of the car out..
Now to go out and test for that snake - sorry rattle.
Bernie