Does anyone know what exactly the black body sealer was, or the name of it? Is it still available. I bought the 3M drip check and the body caulking and plan on using it. But, is the old stuff still available. Man, this black stuff that was on the interior of my car, was really thick in places, like the rockers and the front part under the rear seat side panels for the interior.

Are you referring to the brushable seam sealer? If so, your local auto paint and equipment store ought to be able to set you up.

I went to my local auto body supply place and got black 3M strip caulk.