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Thread: Epoxy ???s...
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7th February 2006, 11:45 PM #1
Epoxy ???s...
Just a simple one or two about epoxy.
Just used it to do a panel glue up of some red oak, 1:1 ratio 90 minute stuff.
It's pretty cold here at the moment, not much over 10 degrees, and prolly at or below 0 at night. I know the stuff will take longer to go off when it's cold, but if it's too cold will it work at all? I did it yesterday, and today it's stiffer, but not fully set. Was ok, managed to scrape off the excess pretty easily.
I also clamped it up pretty tight. I know that's not really good, but is it a big problem? Should I rip the thing up again and re-do it, making sure it keeps toasty this time too?
More interested in doing it right than having to re-do it.
Thanks, I hope...
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8th February 2006, 12:43 AM #2
Gidday Schtoo
I'd be checking the specs on the Data sheet of whatever Epoxy your using...............this i'll give the temp range for a good cure.
Might find it worthwhile to re-do the Join and toast up the cure environment second time round to ensure a rock solid bond.
Good luck with it!
Regards LouJust Do The Best You Can With What You HAve At The Time
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8th February 2006, 02:47 AM #3
Uhh, yeah...
I'll do just that with the nonexistant data sheet, which if it were there, would be in full blown Japanese. Not the 'soft' stuff I can read.
Hence why I am asking here.
I won't get back to it for another couple days, and I'll see how it goes. Still no cure, Not sure wether to pull it apart and re-glue warm or just warm it up.
And order some different epoxy...
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8th February 2006, 07:54 AM #4
Schtoo,
Just warming it gently will usually help.
I don't have a lot of experience in those sorts of temperatures.. my problem is usually the opposite, but I understand that it will go off eventually once it has been properly catalyzed, but it could take quite some time, and probably not at 0°.
I often throw my rollers and brushes in the fridge or freezer for a few hours (or overnight) to save throwing them out between coats on a project. The epoxy goes off in an hour or two, but the brushes are still usable the next day so that gives you an idea!
Cheers,
P
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8th February 2006, 08:17 AM #5
Schtoo, bit of heat will work wonders, I sometimes apply a heat gun, gently around the joins.
Also, whilst I know its not Koshe, a little more hardener in the 1:1 ration also helps in cold weather.Bodgy
"Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams
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8th February 2006, 08:49 AM #6Originally Posted by Schtoo
I'll bet theres even an english version or alternatively do a translation through google!!!
Regards LouJust Do The Best You Can With What You HAve At The Time
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8th February 2006, 09:00 AM #7
just put a piece of canvas over it and place an electric blanket over the canvas on the lowest setting for a few hours. eleci blankets are great in the workshop except for in victoria where they wear em round the workshop
Blowin in the Wind
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8th February 2006, 09:34 AM #8Originally Posted by Bodgy
Epoxy is not polyester, and relies on EXACT mixing to catalyze properly.
:eek:
cheers,
P
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8th February 2006, 11:35 AM #9
Schtoo, I used some epoxy last week (im in Japan too) I used the 30min stuff on a bloody cold day. Its rock hard now. I mixed it with a touch more hardner.
It could be that the 90min stuff isnt curing so well in the cold:confused:
Cheers. Gary.
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8th February 2006, 11:51 AM #10Originally Posted by redwoodBodgy
"Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams
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8th February 2006, 11:59 AM #11
Is it possible to bring your glue-up inside to cure?
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8th February 2006, 12:06 PM #12Originally Posted by underused
This from the West Epoxy website:
DO NOT attempt to adjust the epoxy cure time by altering the mix ratio. An accurate ratio is essential for a proper cure and full development of physical properties.
Go ahead and do what works for you by all means, just realise that the manufacturer's don't recommend it, and I've seen enough jobs which needed re-doing to know you won't get away with it always!
Cheers,
P
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8th February 2006, 12:19 PM #13.
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Follow Midges advice, dont mess with the ratios.
If anyone in Vic is interested, give West systems Epoxy at 97b Argus St, Cheltenham 3192. a ring on 03-95843089. and get user manual sent out to have in the workshop as a brilliant 30 page reference and how to on epoxying. It realy is worth the phone call
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8th February 2006, 12:22 PM #14
Excellent, thanks Lignum. I think they're hiding, as the number rings to a fax line.
Greg
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8th February 2006, 12:24 PM #15
Thanks for the advise.
My problem's the same as schtoo when it comes to reading the advise on the back. Its all in kanji. I just have to wing it sometimes.
Cheers. Gary.
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