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Old 12-01-2018, 12:39   #1
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4200 or 5200?

I am installing a "U" bolt, actually a bow eye on my sprit to attach a code zero to. This is going on a Seaward 32RK. It will need to be drilled through. Should I use 3m 5200 or 4200 for this. Attached are pics of the bolt and where it will go. Also, should I apply the sealant then wait a day before tightening like I was bedding something, or just make sure it's well coated and torque it down when I install it?

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Old 12-01-2018, 12:47   #2
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Re: 4200 or 5200?

5200 is not a bedding compound.
it is a glue.
for bedding you want 4200 or similar.
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Old 12-01-2018, 15:16   #3
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Re: 4200 or 5200?

You don't say, but I'll assume that the sprit is timber. In your place, I'd be sure to soak the drilled holes with epoxy, perhaps thinned a bit to promote penetration, prior to setting the U-bolt. I'd use 4200 or any other bedding compound, liberally smeared on the threaded portions of t he bolt and making sure that there was a bead at either end after pushing it through the holes. Then bring the nuts up to full torque and let it set up. should be fine for a long time.

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Old 12-01-2018, 15:23   #4
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4200 or 5200?

Assuming the sprit is like an IPís, when I installed my chain stopper I first drilled through the sprit with a 5/16ís bit, then drilled down to the bottom layer of fiberglass with a 3/8ís bit. I then installed the 5/16Ē studs and cast them in with the slowest cure West system epoxy, at least one had to be refilled as there was obviously a crack, void, or something that allowed the epoxy to soak in. Reasoning was to completely encapsulate the bolts in epoxy to make darn sure no water could intrude.
However if your anchor roller is like an IPís there is no need to drill through the sprit, just attach to the end of the roller itself like this.Click image for larger version

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Old 12-01-2018, 16:29   #5
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Re: 4200 or 5200?

Quote:
Originally Posted by Jim Cate View Post
You don't say, but I'll assume that the sprit is timber. In your place, I'd be sure to soak the drilled holes with epoxy, perhaps thinned a bit to promote penetration, prior to setting the U-bolt. I'd use 4200 or any other bedding compound, liberally smeared on the threaded portions of t he bolt and making sure that there was a bead at either end after pushing it through the holes. Then bring the nuts up to full torque and let it set up. should be fine for a long time.

Jim
Sure looks like fiberglass in the pic to me, but maybe the OP can post the construction details...is it wood, solid glass, cored?

That will help answer the question.


(short rant

Or rather...to repharse the question to the correct question and then answer that...because the answer as the question is post is "no". Both are adhesives. Rhetorical question: why do things which are thru bolted need to be glued? They dont of course.

"Devil's Glue" (5200) is way over used in applications where its really not the ideal solution...such as where no adhesive is needed...and its not that good of a bedding compound.

5200 over use is one of my pet peeves, but you wanna know what really peeves me...being forced to use it because its all the local chandlery stocks! 😠 I just had to do that...not happy about it.😠

There. Now I feel a little better, but Im still pissed there is more 5200 on my boat. 😆
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Old 12-01-2018, 16:36   #6
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Re: 4200 or 5200?

[QUOTE=belizesailor;2554290]

..being forced to use it because its all the local chandlery stocks! 😠 I just had to do that...not happy about it.😠

Makes me think of the chandlery's in all the shithole countries around the world.
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Old 12-01-2018, 16:39   #7
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Re: 4200 or 5200?

[QUOTE=Ecos;2554292]
Quote:
Originally Posted by belizesailor View Post

..being forced to use it because its all the local chandlery stocks! 😠 I just had to do that...not happy about it.😠

Makes me think of the chandlery's in all the shithole countries around the world.
Yeah, I just added a couple of tubes of 4000UV to my recent order.
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Old 12-01-2018, 16:58   #8
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Re: 4200 or 5200?

Simple answer: We don't use 3M 5200. We used to use 4200, but now use 4000.
These are paintable.

We always tape around the fitting (tape the fitting as well) about 1mm away from the join. We apply a generous layer of the compound, using small pieces of wood to keep the space open if needed. Apply the fitting. Make sure all bolts are wiped clean before curing. Loosely attach nuts/screws to hold in place.

Remove the tape after fitting and clean up with paper towels to smooth down the join. If you're using black caulk it makes a mess, so be diligent with clean up.

Allow to cure for a day or so (see instructions, depends on temp/humidity). Then tighten the fastenings.

If you do this right, you will have a gasket of 1-2mm which, if needed, you can cut through with a sharp blade to remove the fitting, but which will otherwise hold the fitting and keep the holes waterproof.
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Old 13-01-2018, 03:52   #9
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Re: 4200 or 5200?

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Originally Posted by a64pilot View Post
However if your anchor roller is like an IP’s there is no need to drill through the sprit, just attach to the end of the roller itself like this.Attachment 162094
That sounds interesting. What did you do to attach? Just drill a hole through the side of the guide? Here's a couple more pictures so you can see. It's a glass sprit and how the rollers look.
I wonder if that forestay plate is just screwed to the sprit. I could just add another one of those?
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Old 13-01-2018, 04:33   #10
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Re: 4200 or 5200?

Yes, 5200 is a bonding material not to be used for bedding. 4200 is also a bonding material, but less permanent and also not very good for bedding. Bolds don’t need bonding material.
The best bedding compounds stay flexible and tacky. I like butyl rubber or lifecaulk for removable fittings.
Also, to those of you who like to let a bonding material setup before tightening: I think you should reconsider that in doing so you are breaking the bond when you tighten. It would be more effective to just apply, tighten, and leave it sealed. (Leaving extra thickness to form a gasket is only asking for more movement between the parts later, and allows water intrusion into the tiny gaps that would form).
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Old 13-01-2018, 08:37   #11
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Re: 4200 or 5200?

5200 would be fine for this. Also 4000.
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Old 13-01-2018, 11:31   #12
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Re: 4200 or 5200?

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5200 would be fine for this...
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Old 13-01-2018, 11:49   #13
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Re: 4200 or 5200?

I dont like 4200 at all. It firms up kinda like plastic and you can roll it right off the surface. I would use 5200 for that, but there are many 5200 haters on this forum. It is tenacious, which is why I use it. If not 5200 use something other than 4200 IME.
I usually tighten somewhat then final tighten the following day.
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