http://www.chevsofthe40s.com/images_product/large/3701900C.jpg

I purchased the kit in the above link.
The 4 seals in the top of the pic are for the inner/outer fenders, and the two small plates that bolt to firewall just above inner fenders.
(plate left of heater hose)
Those seals are a spongy/rubber type material and as Denny stated in earlier post they were originally stapled. The kit comes with staples.

http://www.classicparts.com/1947-72-Fender-Welt-Black/productinfo/37-521/

Here is where I used that black welt.

I did not care for the stuff to much.
Its not like what I removed, Its not as wide, and it could be a crud trap.
When I do it over I'll use the tar paper like suggested earlier.

Good Luck
(Thank you, for those of you who served)

DADS50
YouTube
1950 chevy 3100