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Old 01-07-2010, 16:51   #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, 03:40   #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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"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

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Old 02-07-2010, 06:15   #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, 06:16   #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.

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