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.
How do you know if you have #8 or a #10 zipper?
Follow the method above to figure out what size zipper you have
IMPORTANT: Please measure accurately before ordering!
Please don't guess, #8 and #10 look very similar.
Counting your teeth per inch will give you the right information when ordering.
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!
We'd like to help you find a solution! You just might be able to help someone else trying to solve the same problem. Please include your email address, we may choose to contact you directly with an answer to your question.
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what size is good for isinglass radius corners, #10 pucker to much ...please advise
radius corners pucker when using the larger #10 or #8 zippers. Im considering using number #5's for the isinglass windows
grady white zipper replacement
I have grady white 282 sailfish. I have #8 replacement zippers which appear to be exact size as broken one. However, removed the zipper stop and took off …
Hi, I have some older Sunbrella window covers on my boat and they have this horrible white plastic binding that is all cracked. I used a seam picker …
How to replace zippers on larger enclosure
I need to replace zippers and I ran into a problem. I tried replacing one side of the enclosure while keeping the zipper complete (both sides of zipper …
how do you replace the slidder box on the zipper
I have a 1985 sea swirl topaz cuddy. The zipper slides corroded and broke off for the rear and port side panel. should I buy your ez xtend zipper . I …
West Marine zipper seizing
I am in the process of returning or replacing a 5 year old marine jacket because the zippers have frozen up. I am a recreational sailor and have occasionally …
Double Zipper - 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 face is 103". Color = black.
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 …
zipper slider size requested
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
trying to build a sun shade. need to attach one part of zipper to the hard top the other end on to the sunbrella fabric. Not sure what you call the piece …
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
52" I NEED 2 AND A 26" I NEED 2 AND 42" I NEED 2. CAN YOU HELP. All zippers can be cut to size. You can order the closest sizes. It's very easy, …
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
retainer box came off the zipper is in perfect shape except the retainer box can this be replaced. How do this stay on in the first place. thanks Hi …
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
I am looking for 195 inch very strong zipper for the stack Pack on my sailboat and that protects the main sail once doused. I have replaced it twice already …
Can you supply zippers to an address in the United Kingdom?
Replacement zips on yacht awnings. Hi Steve, It shouldn't be a problem to send zippers to the UK. How many are you looking for? The easiest way would …
do you supply open ended zippers in excess of 12 mtr
i am making a roller genoa sock for which i need the zip.size 8 shold do Possibly, most genoa socks have ropes coming out of the sock at some point …
Do you have 36" white Riri #8 zippers ?
Building an enclosure for a boat using pieces build previously with Riri zippers. I thought this would be an easy request, but my normal supplier is …
Hi, Need 2 very long, havy duty zippers, 28 feet long,
Hi, Need 2 very long, havy duty zippers, 28 feet long, with stainless slider, for my jib sail and cover for it. Could you help me with that? Please …
Are these sliders compatable with riri? #10 marine
Replacement slider for riri. No, riri are different than any other slider. I do have a few of those in white. You can order the ykk sliders if you …
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.
Hello I have a marine canvass that has lenzip zippers. I have tried YKK 10 from local supplier and they did not pull the zipper tight. Based …
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 email@example.com 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 EZ-Xtend Boat Zippers!
"I wanted to thank you for the fantastic results I have with the EZ-Xtend zipper solution you provided for my Sea Ray.
The isinglass had shrunk to the point that installing it was an all-morning job, with some snaps totally unusable due to the material shrinkage. I really was preparing to purchase a complete new canvas set, but hated to spend the money-especially since the canvas is still in excellent shape.
The EZ-Xtend zippers have made the canvas/isinglass installation and removal about a 10 minute job! (and looks great too!) Thanks again for the quick solution and the reasonable cost, I really do appreciate it.
The extend zippers have been a resounding success. Zippers were needed for the starboard stern section of my bimini top, and for both side curtains of my camper canvas. It is a clever design you came up with to increase the width of connectivity between my bimini top and camper canvas sections. I do not know what I would have done otherwise as the camper canvas sections have shown shrinkage over time.
I got a chance to install these yesterday and just thought I'd get back to you to let you know that they worked perfectly for me. I couldn't be happier with that simple to install solution to my problem now allowing me to properly and fully enclose my cockpit again. Such a great idea.
The Ez-xtend zippers were very easy to install---especially with a little lubricant ( which I always apply periodically to zippers)
"True skill and craftsmanship are rare traits in today's society. When they're held by a person that truly cares about her customers, brings honesty, creativity and passion to her work, you have just described Tammy Hampton. Better known as "The Cover Girl," Tammy has been both a friend, mentor and business partner for nearly twenty years.
I found Tammy by her name tag.... sewn to a sailboat cover, in a nearby marina. The boat cover was fitted with such precision, it clearly stood out from the others. In the years since, Tammy has 'dressed out' at least twenty boats for me. She has yet to meet a challenge for which she could not find a creative and effective solution.
Tammy has become a valuable resource to my Boatbutler business, and she has actually created sort of a "cult" following among my customers. Once they see the quality of her work, the choice is an easy one.
I am still grateful for that little tag on that sailboat cover I found nearly twenty years ago."
Owner, Boatbutler Marine Services, Inc.
WOW! I just got the EZ-Xtend Boat Zippers for my canvas and what a simple solution! Thank you for coming up with this. I am telling my friends about this product.
We just installed the zipper we received on our sea ray boat canvas- what an incredibly easy experience! It makes snapping the canvas so much easier with the zipper extension. Thanks for the crimper & tape - you made everything easy. We just ordered 5 more longer ones to completely update our canvas. Thank you so much for your quick response on our first order.
I love your website and wish we lived closer, so that I
could stop by your shop - sounds like a wonderful place!
Our boat was 10 years old when we purchased it and the canvas was stored all rolled up in the boat. When we tried to put the canvas together the force required to zipper the canvas together was making the canvas split on the seams or causing the zippers to tear, so we had to leave parts of the canvas unattached and every time it rained we would get water in the boat. With your zippers in place we could button up all of the canvas and make a very nice weather tight space which made our boating season very enjoyable.
EZ-Xtend Zipper Saved the Day
I purchased a used 27' Sundancer about a year ago.
I came with the Bimini, side curtains & windshield eisenglass panels along with a bimini to transom cover with eisenglass also.
I don't think the original owner ever put anything up except the bimini.
Nothing would fit, ever where it was short.
If I cheated and put the windshield panels in the side curtains were never even close. If I did it the other way, sides first front panels were off. The canvas is hi quality material from a well known manufacturer.
Started researching about what to do. Then I came across a blog on the Searay owners site. One of the chats was about what I had going on. One owner who replied had purchased your zippers and was raving about solving his problem using them.
Well I'm here to "RAVE" about them also. My $300.00 investment with you has saved me thousands in replacing what is perfectly good canvas.
Boaters if you have a shrinkage problem and we're not talking the George Costanza kind this is your answer.
Your site has also grown to include more helpful information on boat care and maintenance. Great information and wonderful tips.
Thanks again Ron W.