Need help patching dry sacks

You could try Osprey’s Almighty Guarantee. If they won’t fix it outright, perhaps they will tell you how.

I just bought some tenacious tape.  Instructions say to wait 4 hours to let adhesive set.

I can’t tell but is your bag silnylon? It is hard to get anything to stick to that stuff. Silnet used to be something that did and Seam Grip will. I put some on the spot and some on a little patch cut from uncoated nylon material like an old shit and stick them together.

Agree with Bill B.  Especially because read thru the customer feedback, and it has to be that Osprey is selling two different products as the same.  Or possibly, the wrong fabric got into the manufacturing process.  Kudos to Bill, and suggest looking for a better product.  Now I understand why folks buy packs with the same type of closure as a down river dry bag, just to be absolutely sure their gear stays dry.