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A quick question about epoxy.

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A quick question about epoxy.

Unread postAuthor: Wombat » Sat Apr 12, 2008 12:41 am

I bought some Ace Hardware "60 minute epoxy" because it supposedly cures stronger than the regular stuff. I am using it to fill a quarter-inch hole in a pneumatic cannon, and I was wondering if it normally takes longer than two days to fully cure. It is kind-of pissing me off, because I have waited patiently, and it still feels sticky to the touch. It is in my basement, where it is always warm, so I don't see what the problem is. Any input is appreciated.
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Unread postAuthor: hi » Sat Apr 12, 2008 12:49 am

if it has taken more than 24 hours then you probably didnt mix it correctly. if you are touching it then you are not "waiting patiently"
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Unread postAuthor: jook13 » Sat Apr 12, 2008 12:53 am

I once tried to make a piston out of epoxy and parts of it stayed gummy and soft and never hardened, probably from it not being mixed thoroughly).

I have noticed that epoxy usually doesnt get really hard till later than the package advertises. But, if yours doesn't fully harden within a full day, It probably wont ever harden. make sure you are pretty exact with your even portions when mixing and make sure it is mixed completely.

Also, from what I have read on the packages, the locktite is rated to take higher pressures than the ace stuff, at least all the stuff that was on the shelf at my ace.
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Unread postAuthor: Hawkeye » Sat Apr 12, 2008 9:08 am

Some Epoxy also produces what is known as "amine blush". It kind of sweats out a thin layer of stickiness in some conditions. Generally you can wipe it away and see if it is solid underneath.
Edit: Actually Google "amine blush" if you want all the info.
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Last edited by Hawkeye on Sat Apr 12, 2008 9:10 am, edited 1 time in total.

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Unread postAuthor: SpudFarm » Sat Apr 12, 2008 9:10 am

wait for JSR :D
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Unread postAuthor: TurboSuper » Sat Apr 12, 2008 10:14 am

If it's truly staying sticky, I'd say that's because you didn't use enough hardener. Most of the epoxies I've used stay somewhat gummy to the touch after curing, but never sticky.
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Unread postAuthor: Modderxtrordanare » Sat Apr 12, 2008 10:16 am

Why couldn't you have just tapped in a 1/4" plug into it and have been done in 3 seconds?
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