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Old 01-07-2010, 17:51   #1
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J-B Weld on Aluminum ?

Anyone know how JB weld works on aluminum our mast step base is pulling away from the mast. The original base was screwed together with tapped machine screws and they have since stripped I am thinking now of though bolting but also want something a bit more permanent. 5200?
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Old 02-07-2010, 04:40   #2
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J-B Weld works on aluminum, or on ANY metal surface, excepting lead.

J-B Weld will not adhere to, or bond well to:
* Any flexible rubber surface
* Leather
* Vinyl
* Canvass
* Polypropylene plastic
* Polyethylene plastic

J-B Weld Company - Frequently Asked Questions
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Old 02-07-2010, 07:15   #3
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JB Weld works well on aluminum. If you think that there is an outside possibility that you might ever want to separate the parts, use a mechanical fastener.
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Old 02-07-2010, 07:16   #4
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I like JB Weld but am now using West's Gflex thickened epoxy for repairs involving metal. As the name suggests, it has a little more give than regular epoxy so I figure it can deal better with the different expansion rates found when dealing with metal. West specifically recommends it on aluminum. It's quite liquid but you can thicken it more if a putty is needed. Very easy to use - the larger kit comes in two good size tubes that will do a lot of repairs.

The trick to putting epoxy on aluminium is to sand the aluminum just before you put on the epoxy to get the oxide layer off. Then, put on a thin layer of epoxy and wet sand. Add more epoxy as needed. This prevents any air from getting to the aluminum after sanding.

Carl
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Old 08-02-2017, 17:50   #5
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Re: J-B Weld on Aluminum ?

Quote:
Originally Posted by GordMay View Post
J-B Weld works on aluminum, or on ANY metal surface, excepting lead.

J-B Weld will not adhere to, or bond well to:
* Any flexible rubber surface
* Leather
* Vinyl
* Canvass
* Polypropylene plastic
* Polyethylene plastic

J-B Weld Company - Frequently Asked Questions
Dear Sir,
I am writing you because I have an old home that has a sink's drain that goes down and attaches to this big lead pot below the stool, this pot is also what the stool flushes to, and it leaks where it attaches to this lead pot. I was considering using J-B Weld to fix it. I got to wondering if J-B Weld would really stick to lead and if so for how long. So, I did some research on line to that fact and your comment was the only result that came up of making a comment of J-B Weld and lead. Other comments about J-B Weld were about it adhering to every other metal. So, what experience, if any, have you had with J-B Weld NOT adhering to LEAD. This fixture is sub surface and we are going to remodel this bathroom and I don't want it leaking again in say 10 or 15 years where I have to tear up the floor to fix this again. Also, this bathroom is on the second floor so you can imagine what it does to the downstairs bathrooms ceiling.
Any comments will be appreciated.

Sincerely,
Bill Watkins
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Old 09-02-2017, 07:47   #6
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Re: J-B Weld on Aluminum ?

unbusted,
Your question is unclear. Do you have any pix? However, if there is any stress on the bolt holes by the movement of the mast, I cannot see how the JB or any other product would work. You, then, will need to replace the fittings. Hope this helps.
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Old 09-02-2017, 08:53   #7
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Re: J-B Weld on Aluminum ?

I think JB weld is what we called metal set in the Army, if so it's nothing but aluminum powder in Epoxy, is JB weld a two part? I have never used it
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Old 09-02-2017, 09:20   #8
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Re: J-B Weld on Aluminum ?

rognvald, the OP is 7 years old. Don't think he's still waiting for advice.

a64, that is basically what it is, and it is two part. I've used it as a filler, for example when I needed to move the catch plates for new dogs on my ocean hatch and fill the old holes. Also fixed a hole when the drill bit walked. Filled, redrilled through the JB, and it has held a rivet for years.

I don't know that I would use it in any serious stress application, probably certainly not on a mast step. I also assume that since it's epoxy that it is not all that UV resistant although it's opaque with the metal thickeners which probably helps.
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Old 09-02-2017, 09:42   #9
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Re: J-B Weld on Aluminum ?

"rognvald, the OP is 7 years old. Don't think he's still waiting for advice."
Suijin


Perhaps he needs some time to think about it! Good luck and safe sailing.
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Old 09-02-2017, 12:13   #10
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Re: J-B Weld on Aluminum ?

This is not about a water vessel it is about a HOME that has a leak in a lead pot that a stool and sink drain into. I just want to know if J-B Weld will stick to lead and for how long. GordMay posted that he had bad luck with J-B Weld sticking to lead and I wanted to know what his experience was.

Bill
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Old 25-02-2017, 19:08   #11
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Re: J-B Weld on Aluminum ?

Quote:
Originally Posted by BillWat View Post
This is not about a water vessel it is about a HOME that has a leak in a lead pot that a stool and sink drain into. I just want to know if J-B Weld will stick to lead and for how long. GordMay posted that he had bad luck with J-B Weld sticking to lead and I wanted to know what his experience was.

Bill
Don't know if you have PM privileges yet (with only two posts you may not), but you could PM GordMay directly, since he made the initial statement about lead and JB Weld.
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Old 25-02-2017, 20:18   #12
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Re: J-B Weld on Aluminum ?

Quote:
Originally Posted by BillWat View Post
This is not about a water vessel it is about a HOME that has a leak in a lead pot that a stool and sink drain into. I just want to know if J-B Weld will stick to lead and for how long. GordMay posted that he had bad luck with J-B Weld sticking to lead and I wanted to know what his experience was.

Bill
A
When we bought our old (1887) house it had two similar fittings to what you describe. They were from sink and tub drains on the second floor. Leaks caused ceiling damage. Plumber wanted several thousands of dollars to fix it. All kinds of baloney. It was lead drain pipe into a rusty cast iron stand pipe. The whipped lead seal had fracked.

I went to an auto repair store. Bought some auto fiberglass mix and some glass tape. That was some 25 years ago. Narry a drop in all that time.

Good luck.
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Old 26-02-2017, 04:43   #13
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Re: J-B Weld on Aluminum ?

J-B Weld no longer lists lead as an unsuitable substrate.

J-B Weld will not adhere or bond well to:
Any flexible rubber surface
Leather
Vinyl
Canvas
Polypropylene plastic
Polyethylene plastic
FAQ ➥ FAQs | J-B Weld
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