This is a photo of the underside of the trunk from my 1968 Roadrunner. Can you help me with the name of the material injected like a filler and vibration damper between the sheet metal and the support structure on the underside of the hood and trunk at numerous locations. It is not a butyl or rubberized type seam sealer. It is much "less" dense, lighter weight, and dries hard. It appears to be a closed cell foam product of sorts. Any suggestions of what it is and a brand name of a manufacturer? I am sure seam sealer would suffice but just trying to match the original. A few of the original injections have fallen out during restoration and I am trying t to match.
