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Old 08 April 2013, 19:06   #11
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This is making more sense now.
It'll probably have to be Polymarine glues as I have polymarine 2 part hypalon glue here then.

I really don't want to risk any possible incompatibility issues.
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Old 08 April 2013, 23:12   #12
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When regluing my wooden transom, I just used the Stabond PVC glue and haven't had any issues with delaminating.
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Old 09 April 2013, 11:21   #13
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Originally Posted by captnjack View Post
They do. At least when I had a PVC boat it seems to and all my PVC plumbing seems "melted" together.
Well, Jack, I suspect you're not using the PVC pipe cement on your boat, so that's kind of a moot point.

The telling point would be if you can disassemble a glued PVC fabric repair job with a bit of heat. I've never owned a PVC boat, so I haven't tried; maybe someone else could chime in (Peter_C took his boats floor off, so he should know.) If it comes apart without damage, the material can't have been welded through gluing.


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But I doubt this impacts whether your PVC glue will or won't adhere to the 1 or 2 part hypalon glue you are using as a primer. They probably suggested 1 part since its cheap and works good enough in that application.
As I stated before, I've tried the 1-part, and it didn't hold worth spit (not my first choice of wording.) Maybe not the best test, as conditions may not have been ideal, etc.; but I've had little trouble with the 2-part, and those were likely in similar conditions. Since we're talking about a reasonably critical section of structural integrity (transom falling off = bad), I'd think you want the strongest repair you can come up with, wouldn't you?

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Old 09 April 2013, 12:04   #14
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Well, Jack, I suspect you're not using the PVC pipe cement on your boat, so that's kind of a moot point.

The telling point would be if you can disassemble a glued PVC fabric repair job with a bit of heat. I've never owned a PVC boat, so I haven't tried; maybe someone else could chime in (Peter_C took his boats floor off, so he should know.) If it comes apart without damage, the material can't have been welded through gluing.




As I stated before, I've tried the 1-part, and it didn't hold worth spit (not my first choice of wording.) Maybe not the best test, as conditions may not have been ideal, etc.; but I've had little trouble with the 2-part, and those were likely in similar conditions. Since we're talking about a reasonably critical section of structural integrity (transom falling off = bad), I'd think you want the strongest repair you can come up with, wouldn't you?

jky
On my old PVC boat I pulled the (old) 1 part sealed patches off with heat and pliers. The 2 part patches I never tried to remove because they were stuck a helluva lot better and never delaminated for the rest of the time I owned the boat (4 years). I own a hypalon boat now and have never needed to patch it. I did use a 1 part glue to attach little 3"x3" registration sticker plaques, they are gradually coming loose after 4 years. But they are non-structural and I actually used the weak glue there on purpose because I wasn't sure I liked them that well and wanted a future option to remove/replace them.

I have no idea why anyone would recommend 1 part glue for anything RIB related PVC or hypalon, but for some reason the OP is saying someone is recommending 1 part hypalon glue on the transom. I have no idea why and I am not actually recommending 1 part glue - in my experience it dries out, loses its elasticity and bond over time and just overall sucks.

Just postulating on why it might have been suggested by a manufacturer.
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Old 09 April 2013, 15:55   #15
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The telling point would be if you can disassemble a glued PVC fabric repair job with a bit of heat. I've never owned a PVC boat, so I haven't tried; maybe someone else could chime in (Peter_C took his boats floor off, so he should know.) If it comes apart without damage, the material can't have been welded through gluing.
The PVC parts of a Zodiac that are not thermo bonded can be pulled part with heat if they don't fall off after 10 years. No damage and no bonding as the glue used is a mechanical bond mostly. Acetone cleans the glue off with a lot of physical labor. I found scuffy pad removes the glue, but doesn't remove hardly any of the PVC boat material. Before reinstalling the floor/transom/etc. a tool for roughing up the PVC material, and an MEK wipe will build a strong bond. The transom wood needs to be sanded, and roughed up also. Cleanliness is very important to a good bond. If there was something that needed repair or such on the transom I would personally use epoxy.
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Old 09 April 2013, 19:45   #16
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Nos,

Why would you like to use Hypalon glue on a PVC sib. That I know Hypalon glue is for Hypalon fabrics and PVC glues are for PVC fabrics. If 2 part much better, will hold and last longer, one part is only for instant small emergency repairs that won't last that long.

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Old 09 April 2013, 19:51   #17
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Nos,

Why would you like to use Hypalon glue on a PVC sib. That I know Hypalon glue is for Hypalon fabrics and PVC glues are for PVC fabrics. If 2 part much better, will hold and last longer, one part is only for instant small emergency repairs that won't last that long.

Happy Boating
Have a read of this link and it'll become clear. It's the same job that needs doing on my mate's sib.

Zodiac Dinghy Transom Repair « Polymarine Paints, Adhesives, Parts & Accessories
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Old 09 April 2013, 23:38   #18
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Nos4r2, do you think that the person in the link you posted is doing a professional job?

From my perspective there are more than a few things I would question. Why wasn't MEK mentioned as a pre-glue application to soften the PVC material as per the manufacturers instructions? Never sand material off, which means no power tools. Leaving glue on the material is not very good prep work. The joints do not need to be clamped for 48 hours as the glue sets in around 20 minutes. That is why you only mix enough glue for the job you are doing, as it dries quickly once the Toluene is added. So the only place I have seen mentioning of using Hypalon glue, is from the manufacturer of the glue...Hmmm... Where is the Zodiac repair guy with all the truthful answers?
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Old 10 April 2013, 04:17   #19
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The link isn't saying sand fabric off with a powertool, it's saying remove old glue from a joint between dissimilar materials.
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Old 11 April 2013, 17:34   #20
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thank you one and all...me and nos are going to do a bit of homework before fixing the zed...i have put some pictures up so you can see where the transom has come away
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