Ahhh, yes. It was probably styrene-butadiene rubber, I've read
where it was developed during the war and was the primary
type of foam that was produced after WWII. Now-a-days
polyurethane-based foams are used in the majority of the products.
I had pictures of all of it that I took off my '50 when I
pulled the front clip in '09, but they're being held captive
on my old hard drive. The cross section of the reproduction
material is not as thick and the compound seems to be more
dense than the original foam. Because of that it really
doesn't fill the gaps nor does it seal as well as the original
stuff.
Now you done it Carl, got me goin' on that foam bit....
I poured ridged poly for the '54 clock housings and GMC
parking light lenses that I was experimenting with last
winter. Since I've got all this spare time on my hands
and since I wasn't happy with the reproduction foam seals,
you got me thinking about making up a mold and trying some
of the urethane or silicone foams from Reynolds. Looks like
a good project for the basement if we get snow bound this winter.
http://www.reynoldsam.com/product-category/foam/ dg
