Indeed! It's also worth noting that the USPS (at least my local office) requires any package sent via Registered Mail to be covered in its entirety with this a

Indeed! It's also worth noting that the USPS (at least my local office) requires any package sent via Registered Mail to be covered in its entirety with this and only this tape (water activated, not gummed). Registered Mail is their most secure product - chain-of-custody, stored under lock-and-key at each hop along the transit path. So at least according to the USPS, this stuff is as good as gold. (A slight pain to apply what with water activation and all, but man does it hold!)