Hey Ron,

You know, I don't have that much experience with heat sealing Dartek. You can do it but it takes more heat than PE so I don't know how well it would work not using a good heat sealer. I know that with PE you can use taking Irons, regular irons and with some difficulty even heat guns. I think you are on the right track - just do a bunch of testing (and of course take some pictures and report back afterwards!) Sorry I don't know more on the topic.

Ashley