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Kayak repair Local plastic welder  Rate Topic 
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 Posted: Sun Jul 4th, 2021 04:47 am
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SanCarlos246
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Mana: 
I was kayaking  today and my Hobie kayak was taking on water. I discovered a 3 inch crack in the hull . Is there anyone in the San Carlos area that can plastic weld? I have a tube of  3-m 5200 but I am not so sure this will stick to the  plastic hull long term.  Thanks    Jeff

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 Posted: Sun Jul 4th, 2021 01:52 pm
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Bullshipper
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Brian Riplogle and a fellow next to the bank rent poly kyacks so they might have the tools. But you're right, 5200 will not work near as well.

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 Posted: Mon Jul 5th, 2021 12:38 am
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SanCarlos246
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Thank you, I will check both of those sources.

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 Posted: Mon Jul 5th, 2021 02:10 pm
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Steve W.
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I would look at you tube video's to see what other have done.

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 Posted: Mon Jul 5th, 2021 04:20 pm
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Hook
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I am about to fix a common problem on Toyota Highlander arm rests, where the cheap plastic supports under the arm rest break free inside the arm rest housing.

On you tube, I found a fix where the guy swears by a product from Bob Smith Industries. It is an epoxy that is made specifically for adhering to plastics. He's tried others from JB Weld and other prominent companies who sell supposed plastic epoxy compounds, but this one is supposed to adhere better than any he has used. Might see if you can get some.

It's called Quik-Cure. It's a five minute, two-part epoxy. Remains somewhat pliable, which I think might be good with the flexing that a yak hull can do.

BTW, is your crack in conjunction with the drive mechanism or the skeg(s)? I have been researching buying one and there were models in the early to mid 2000s that had lots of problems with cracking around these locations on the hull.

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 Posted: Wed Jul 7th, 2021 02:28 am
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Bullshipper
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HDPE is a lot different than car plastics that will fix with KolaLoka and many others.
HDPE called Ropelene can be glued, but it usually first envolves scorcing the surface to provide micro anchor points, and I believe that the tensile strength of 5200 still is about 1/7 of the normally 600 psi when bonding common plastics, woods, and fiberglass. And 3M does not recommend it.

The how to techniques and test results are specifically spelled out by 3M on their Technical Data Sheets for each product, but I also know that welding is the way to do.

Amazon delivers to Mexico, the welding technique is straight forward if you have the right tools and Hobie would be another source of course.

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 Posted: Thu Jul 8th, 2021 08:55 pm
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repsilon
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I have a welder ... somewhere. 

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 Posted: Thu Jul 8th, 2021 10:53 pm
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Bullshipper
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https://www.amazon.com/Jounjip-Plastic-Welding-Black-Rods/dp/B07RG8K18D/ref=sr_1_1_sspa?dchild=1&keywords=plastic+welder+kit&qid=1625784723&sr=8-1-spons&psc=1&smid=A3AY4XM7YGOKIF&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExUUVMQlBCQU1aU1I1JmVuY3J5cHRlZElkPUEwNjIwNjk3MUtGVDhSTlRTMFdOMiZlbmNyeXB0ZWRBZElkPUEwNjU2MzExM0VNNExVSzJRS09DSiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

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 Posted: Thu Jul 15th, 2021 05:09 pm
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John S
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An easy repair for any plastic/ roto- molded boat is to use P Tex candles. These are used to repair the base of skis, snowboards, and any manner of plastic water toys on craft.



You don't need a 'welder' or any special machine, just light the end of the P Tex candle with a match, and it will burn and drip (just like a wax candle) into the cracked area and fill it. Once it dries you can sand it down smooth if desired.



You can also use a hot iron - like a iron to do clothes to smooth it out and level it a bit. Once it cools off, and hardens, its fine and will stick.



Epoxy will not bond to /stick on roto molded plastic. 



Usually one can buy P Tex candles in different colors if desired to match the kayak color. You can order P Tex candles on Amazon (different colors) or get them at most sport stores. Very easy to use, no skill needed.



I used to use P Tex to repair base of skis when I lived in ski area, and now I deal with boats, I used it to repair any plastic dinghy or craft that is roto molded plastic which most kayaks are. Plastic is much more durable than fiberglass though usually a bit heavier as well.



Good Luck


John S

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