I don't believe so. Mine just had a fiber insulation glued onto the bulkhead.
It seemed like the top (outside) layer had a hard coating on the top.
I think the same material is used inside the passenger compartment, as well (behind the upholstered firewall cover).
Did I mention who cut out, and formed the SS panels? I am proud to say I did cut out the cardboard template that was used in their design. They really fit great. Thanks Wade!