Jumping into this a little late but trying to expand outwards from r/myog and this thread caught my eye..
I run Mozet Supplies and like zippers/ buckles. Here is some history on your main question.
No big difference between Aquaguard and Uretek. Uretek zippers are made by Uretek for YKK in Canada?/ the US. Aquaguard zippers are made everywhere. There are some politics as to why YKK uses Uretek here that can be read in this lawsuit:
https://casetext.com/case/au-new-haven-llc-v-ykk-corp-8
A quick summary:
Mike Blenkarn, a MEC/ Arcteryx innovator created the first “waterproof” zippers. He did so through a connection with Stuart Press from Uretek, a developer of polyurethane coatings for outdoor gear. In August 11, 1999, Uretek agreed to laminate zippers exclusively for YKK USA in exchange for an upfront payment as well as a guaranteed minimum annual order. The agreement expired on July 31, 2004. Although the agreement was never renewed, YKK USA continued to pay Uretek to laminate its T4 and T5 zippers for many more years.
YKK then entered into an ELA (exclusive licensing agreement) with the patent holders and began to pump out zippers in Asia and abroad. There was one exception: the ELA does not convey a license to use the patents “for zippers placed in finished goods in the high end outerwear, marine, military and luggage (excluding sports bags and cosmetic bags) markets. In 2006, a belief came about YKK was selling these zippers into the unlicensed markets – hence politics ensue. The suit above goes into detail but for the most part it’s been put aside.
Aside from politics, Aquaguard is also available in vislon as well as coil. You can see this in certain bike bags and rain jackets. Only downside of the vislon stuff is that there is about a 6 month lead time to get it, whereas coil is much faster at 2-4 weeks pre-shipping. I quite like the durability of vislon over coil but I like the ease of how coil slides. Different sliders will improve sliding but overall, I find coil slides easier than vislon – especially with the Aquaguard coating.
Aquaseal is one of YKK’s submergible waterproof zippers. I would not use this in any other application. You can see it used on dry suits. It does use vislon teeth similar to the Aquaguard vislon zipper. It should be welded to show it’s true colours.
For a tent, I would go with Aquaguard coil in #5 or else a regular uncoated #3 or #5 reverse coil zipper with dual flaps. #3 Aquaguard is asking to fail in long term use, but depends on how you are using the tent and how much. The weight savings are nice over #5 – I just don’t see the tent holding up over the same time span as an equivalently used one with regular coil #3 or else #5 in either. My thoughts.
I am curious what you ended up going with.
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