I see no one got back to you.
Without a picture I am flying blind, but I think you should be able to untwist the seal by hand and attempt to "re-stick" it. How isthe remainder of the seal attached? Is it stapled along the bottom or something?
Lou, Laura, & Freya the wonder dog
2008 GMC Sierra 3000HD Crewcab SB Allison Duramax
2019 Flagstaff 8529FLS - Pullrite 3300
HAM CALLSIGN - KC3FFW