I have just received a new shipment of airtight/waterproof zippers from TIZIP, and this time I ordered some MasterSeal 10 zippers in addition to the SuperSeal zippers I have been using since 2016.
Both zippers are the same size and have the same air pressure rating, but compared to the SuperSeal, the MasterSeal 10 is slightly lighter weight, less expensive, more flexible, requires less force to operate, and is easier to clean. It has only one seal and a somewhat lower cross-breaking strength than the SuperSeal (but is still very strong), and because it has exposed teeth, the MasterSeal may be less abrasion resistant than the SuperSeal, which is still the king of airtight zippers with its multiple seals, amazing strength, and fully enclosed teeth. Unlike the SuperSeal though, the MasterSeal has TPU on both sides of the tape, so TPU-coated fabric can be welded to either the inside surface of the zipper, which makes installation significantly easier.
Bruce Campbell of Fairbanks, Alaska, has been at the forefront of DIY Packrafting since the early days, and he has been testing the MasterSeal in a DIY Packraft and he tells me it’s been working very well, so I might offer that as an option if people are interested. I plan to start by offering this zipper in bow bag kits, but in the meantime, check it out here in the shop where it’s currently a standalone product.
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