I had 2 days to make a cardboard airplane for Halloween. All my other tape was too weak to hold its flimsy structure. This tape though...once it set dry it wasn't going anywhere! I walked around waiting for a wing to fall off but the snakes I glued on fell off instead! If this tape can handle me schlepping around all day and getting stuffed in and out of cars then it will definitely keep your boxes sealed.
This product is advertised on the Staples as packing tape It is not packing tape. It has to be cut into strips moistened and then then applied. Big hassle! I ended up not using any of it - waste of money.
Was easy to apply. Cut to length then wet with sponge. Press into place. Sticks immediately. Makes for a neat package. Survived the post office. Even got a complement from the recipient on the condition of the box.