Best method to remove roof extreme sealing tape and alternative brands?

I managed to scratch up some of the sealing tape on the roof of my tent due to low hanging garage and would like to remove and replace the tape. It’s just one side, what’s the best way to remove this? I’m contemplating also just adding some tape over the top of the damaged section which might be easier.

I also can’t seem to source the specific tape that GFC uses and wondered if there’s an alternative brand which might be more readily available through local hardware stores.

Have you contacted GFC Support?

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