I’d like to use an adhesive to put a patch on my backpack. Unfortunately, no one at my local craft store seems to know which adhesive to use, despite a whole aisle of glues. None of these glues say they can be used on backpacks, though a couple warn that they can’t be used on “certain types of nylon.” So I turn to you all and ask, which adhesive is best for sticking rather than sewing on a decorative patch (say, a National Parks patch) to a backpack? The pack is described as “210-denier Honeycomb CryptoRip HD nylon with PFC-free DWR,” if that helps! Thanks.