I have used good old duct tape for years. That is good for anything. The PO even complimented me on how well my pkg. was taped. Wished more people would. Have done a lot of overseas shipping in the past with 3 sons in the Navy. Don't know why they should mind your xtra tape. If it should become opened during shipping, they wouldn't have to hear complaints. I have worked in the main PO in Cedar Rapids & if you ever saw how the mail comes off the trucks, you'd understand the use of extra taping.