I got mine from:
The Original RV Wholesalers - RV Sales Ohio RV Dealers RV Sales Florida RV Dealers
EDIT: Here is a direct link to it:
Butyl Putty Tape - RVWholesalers.com RV Parts
The Original RV Wholesalers - RV Sales Ohio RV Dealers RV Sales Florida RV Dealers
EDIT: Here is a direct link to it:
Butyl Putty Tape - RVWholesalers.com RV Parts