I used this stuff:
on a single layer, The hammock is now in the possession of a friend, but has been slept in at least 20 nights with no signs of wear.
There used to be a post on tarp & hammock repair, I can't find it, & the url I have is no longer working.
When you finish your repair, if you could post: what you did, how you did it, etc. That would be great.