Jack Wolfskin Devils Tower

Several years ago, I purchased the Jack Wolfskin Devil's Tower with rainfly. I have used it less than ten times and recently, while in a rainstorm in the Adirondacks, water leaked in and the fly was mud splattered. I washed the fly by hand and dried it outside. The tape covering the seamseal just peeled off!!

Efforts to contact Wolfskin directly have not been successful and I am obviously upset over this issue. I want to replace the tape or insure a good seal!!!