Auto parts stores that specialize in auto body repair materials - paint, bondo, sealers - will have butyl sealants. probably more than one type - tape, rope, aerosol.
Mike
__________________
Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper