What is best to seal rear tail lights when installing new lenses?

The Fiero store sells a roll of sealant tape (basically a bead of a sticky rubbery substance), which is the original, when I did mine I used silicone caulking (window or bathtub sealant or something), and that's working just fine.

butyl tape or butyl rope. same stuff to seal the windshield
go on ebay it's about 1/8th inch tape but the actual tubes of the stuff is much better

I used 3M Window-Weld butyl rope from O'Rielly's. It was 1/4 in x 15 ft, but I had to stretch it to make it thin enough to go into the groove. I let the whole thing lay in the sun for a few hours to become good and sticky, then mated the housing and lens together. You will have plenty to do a pair of tail lights.

quote fierofool: I used 3M Window-Weld butyl rope from O'Rielly's. It was 1/4 in x 15 ft, but I had to stretch it to make it thin enough to go into the groove. I let the whole thing lay in the sun for a few hours to become good and sticky, then mated the housing and lens together. You will have plenty to do a pair of tail lights.

3M Windo-Weld Ribbon Sealer {butyl tape/rope}


If you use something "dries" {i.e. caulking} - good luck to open them again!

------------------
Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles

[This message has been edited by Vintage-Nut (edited 09-10-2024).]

Thanks for all the info.