Heat limit for JB Weld? - Page 5 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 10-01-2003, 11:36 AM   #41
Ed Smith

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I was just concerned that I might have offended Ed.

Believe me, you did not offend me. It is impossible to do so,

Ed S
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Old 10-01-2003, 04:40 PM   #42
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No problem KonTiki, I think. Although I did have to clean the coffee spray off my monitor and glasses.

I think the slow set JB is probably OK for general 2 stroke repair, but would be severely tested on any glow 4 stroke pipe or the DF application I have in mind. This pipe has been known to deform if run out of the ducting. Aluminiums (very generally) melts at something like 725-750degF and both of these applications are capable of producing those temps.

About the Devcon and Permatex ceramic epoxies. I know I've used the Permatex stuff, and it's very good for it's applications. These are muffler patches, wood stoves, refractory repair,... It's also damn hard on the fingers as it cures. (Don't ask) This stuff is very strong, but porous and very brittle. Oils and engine vibrations will do it in, I think.

Shawn Millington
MAAC 60921
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Old 10-05-2003, 09:53 AM   #43
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That's a relief, thanks.


Sorry 'bout the glasses. Yow, pipe deforming outside the duct. That's HOT.

It appears that there's a huge variation in the temps encountered. The RC car guys set their needle by temperature using a laser device. Might be a useful exercise to borrow one of these and do some tests.
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Old 10-14-2003, 01:18 PM   #44
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The Permatex high heat epoxy did not stand up to the heat\vibration of my Saito 56 in the exhaust port.

I have thrown up the white flag and am sending the cylinder to Horizon .

Chris Rebidoux
Gravity works. I've tested it......often!!!
Building: Jerry Bates 1/4 Chipmunk
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