Alright, stupid question time…. I’m doing the cowl area on my ‘60 ElCo and need a source for that gray sticky play dough goo they used everywhere on old GM stuff. It’s different than seam sealer and the tar they used. It stays pliable so that things can come apart later. It’s under trim, filling gaps, everywhere. I need it for dash trim and kick panel vents now, everything else later. What is that stuff? What’s an easy source? I don’t wanna spend the whole day wading through random forums reading Vette guys arguing, so I thought I’d just ask y’all.