In the US there are three big zipper manufacturers that are used on boat cover applications
In order of popularity:
YKK- UV resistant zippers (most common) but has no warranty
Lenzip- UV resistant zippers are the only zippers available that offer a lifetime warranty. They also YKK compatible.
RiRi- UV resistant zippers with a five-year warranty. RiRi zipper is not YKK compatible. RiRi marine zippers are almost not available in the US and I suspect will be gone before long.
Marine zippers have been a source of frustration for boat owners for a long time. After time exposed to the sun's UV rays, they begin to breakdown. They get chalky and become brittle. They eventually lose their teeth, or the teeth begin pulling apart. Another big complaint is the zipper slider.
Are there different sizes? Yes, there are, and it's important to know which size you have and which size you need to request if you are having custom boat covers built for you.
The most common sizes of marine zippers used in the industry are #5, #8, and #10.
In my shop we use YKK #10, and Lenzip #10.
I keep #8 YKK Marine zippers for replacements on factory manufactured boat canvas. This is because many boat canvas manufacturers use them. If I had a choice, I would never use a #8 marine zipper. My thinking is why go smaller when bigger is available.
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Actual Size Zipper Photo
Can Be Used On Any Device Right From Your Boat
Note: You will need to give your browser permission to display the actual size widget once you click on the link.
Here is a picture of a separating marine zipper and the proper terminology starting with #2.
Separating means that the zipper unzips and the two sides completely separate from one another.
2. The #10 Separating Marine zipper
3. Insert pin
4. Retaining box
5. Box pin
6. Teeth Elements
7. Zipper tape
8. Zipper slider unit
Below is a list of the things that are most likely to fail on a marine zipper, and what to do about them
Tip: Determine your boat zipper size (see what size zipper do I have)shown above, and keep a dozen extra metal zipper slider and stainless steel crimp-on zipper stops on your boat for repairs. In salt water boaters, replace the pulls once a year. Stainless steel zipper pulls are on the market for salt water boaters along, and they are worth the price since you can keep them for life and can put them on all future boat zippers you may have. Another nice add-on marine zipper option is a lanyard zipper pull. This cord attachment adds additional length and gives more to grab and pull the zipper up and down with.
If the retaining box breaks off.
Teeth on each half of the zipper separate and will no longer hold together. Check your zipper teeth for extreme degradation.
Stuck zipper slider
Here is a photo of EZ-Xtend Boat Zipper
You will find Ez zips very helpful for shrinking boat canvas, working as an extender zipper. Another great use for our Ez zip, they make a great temporary solution for failing zippers until permanent repairs can be made. Make EZ-Xtend Boat Zippers a part of your essential boat gear.
Marine zipper strain caused by material shrinkage
Zipper stop fails and slider falls off the bottom of the zipper.
Please Read Before ordering zippers
The marine zippers we sell are the same zippers we use in our shop, and are shown on this page. They are made for an outdoor environment.
Order your zipper sliders here!
Please Read Before ordering sliders
Order your zipper tabs here!
Buy your stainless steel crimp on zipper stops here!
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what size is good for isinglass radius corners, #10 pucker to much ...please advise
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Which of your products would be appropriate to replace a double zipper on an Isinglass smiley face. Either #10 or #8 will work. Length around the smiley …
Purchase from a non-us esident travelling to US in end of may.
Hi, I do not live in US but ill be travelling for memorial day to FL, how can i buy a Marine zipper from you? could I use a non US credit card? thanks …
In the salt water environment, do you recommend Plastic or Metal Self locking YKK #10 Pulls? Tricky question. Metal is stronger and I prefer them, …
what kind of machine is best for sewing marine zippers?
I need a heavy duty machine and don't know what to buy. Hi Roxane, Good question. I think that depends somewhat on your budget and your space for …
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just bought yatch, zipper stops missing on 2 zippers, now i lost 1 slider, didn't know stops were missing. My question is what size zipper slider do I …
can you replace a #8 plastic zipper on a sail cover with stainless zipper and pull?
We have a sail cover with a degrading plastic #8 zipper. I would like to replace it with a #10 stainless zipper as the boat spends a lot of time in salt …
Are your zippers YKK or Lenzip?
I need to replace the full canvas and Biminis on my Sea Ray EC390 and would like to know if the zippers you sale are the YKK or the Lenzip ones? Did I …
WHAT DO YOU CALL THE PIECE THAT GOES ON YOUR HARD TOP THAT HALF A THE ZIPPER IS ATTACHED TO
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there are two 48" zippers on the boat cover...you offer 36", then jumps to 60"..can you'all cut them to size??
replacing zippers on a boat cover need four total, two - 94", two 48" see that I can order the 94", but how to get the 48" ones?? Hi Tracy, Marine …
I HAVE DIFFERENT SIZES YOU DONT LIST
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I have a Sun Tracker bimini boot and the damaged zipper is 48" long. Can I cut a 60" size #8 zipper down to 48" or do you sell 48" zippers ?
I have a Sun Tracker bimini boot and the damaged zipper is 48" long. Can I cut a 60" size #8 zipper down to 48" or do you sell 48" zippers ? Hi Ron, …
How can I sew a zipper?
Do I need a special sewing machine and a special sewing thread? Hi Rudy, Let's first talk about the sewing machine. If you already have a sewing machine, …
Bimini Zipper Problems
The zippers on my bimini top (2000 Regal Commodore 2460)are shot - corroded. The slides are jammed and now broken. I tried to free-up using white vinegar …
Zipper Stop Removal
I want to replace my YKK #10 aluminum sliders with stainless steel sliders. Is there a tool or a trick that will remove the stop from the zipper without …
I have a 2004 jeep wrangler and need a replacement retainer box for a #10 zipper. Any idea on where to purchase the retainer box? Justin, Retainer …
Zipper for a Bimini top, black, 24 inches
I need a zipper that has two sliders that will separate to allow a cable through then close around the cable and not slip, # 10 marine grade. Thanks …
zipper is in perfect condition the retainer box came off can this be replaced
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What is best way to lubricate a plastic zipper?
To lubricate a plastic zipper on a boat canvas. Hi Richard, That answer we have found to be a little tricky. I think it really depends on how old …
Marine grade zipper
Hello, My name is Debora and I am making a sail cover and need to order a #10 seperating zipper but, I need the pull to be stainless steal and I need it …
If the retaining box breaks can it be replaced?
The retaining box fell off the zipper and i was wondering if just the box could be replaced? Hi Don, No, the retaining box cannot be replaced and is …
Where are you located in South Florida?
Zipper replacement help. Hi Kevin, I am in Buford GA. There is a nifty fabricator locator online that can be found here. http://marinecanvas.com/ …
Zipper for my Stack Pack
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Can you supply zippers to an address in the United Kingdom?
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Do you have 36" white Riri #8 zippers ?
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Hi, Need 2 very long, havy duty zippers, 28 feet long,
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do i need to buy stop for zipper io orderd?
just want to know if zipper stop comes with zipper HI Jeff, No, but I can send one at your request! Only one is needed per zipper.
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problem ordering product
when i try to choose pay pal the web site says please enter country and valid zip code when i do this it will not accept firstname.lastname@example.org 313 491 …
looking for a one sided #10 marine zipper for a underwater utility bag
This is a bag, so one sided zipper is what is required. The existing zipper has lasted several years with occasional lubrication. Hi Jeff, I am not …
YKK is a trademark of YKK
Lenzip is a trademark of Lenzip Corp.
RiRi is a trademark of RiRi
EZ-Snap is a trademark of Isosso
Be Sure to Check Out All Our EZ-Xtend Boat Zippers Products!!