1963 Dart 170 2 Door Post Resto

One question I have is that there was a fabric type material at each point where the dash bolted to the lower window frame. I'm assuming it it to keep it from rattling and squeaking. Does anyone know what the material is or a good substitute? I was considering using something like hockey tape, the material type. Would this be good or does anyone have a better suggestion? Thanks.
i've used the 'soft' half of self adhesive velcro (hook and loop) between panels with good success in the past.
neil.