Join Date: Mar 2002
Location: Austin, TX, USA
Re: Black tar (dialectric) 67 coupe
It is just black urethane sealer. It's the same stuff used to seal the windshield and back glass. Also used around just about all major firewall penetrations. It stays soft and gummy forever. Just stuff it in the backs of the sockets, and put a couple "ropes" around the inerior side of the connector to keep water out.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI