JB-Weld application when COLD...???

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AJMD429
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JB-Weld application when COLD...???

Post by AJMD429 »

Can you apply it in an ambient temperature that is rather cold...? I see nothing about that on their website.

I would 'assume' that the chemical reaction would still happen, but happen more slowly; however I'm sure there are other factors.
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Old No7
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Re: JB-Weld application when COLD...???

Post by Old No7 »

If that's a concern, I'd warm the parts and area with a blow dryer or heat gun first, and also maybe "aim it in that area" while it cured too. A propane heather -- used safely of course -- would also help offset any negatives from the c-c-c-cold. Good luck.

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Re: JB-Weld application when COLD...???

Post by Beaker »

If you can mix it, it will cure... eventually.
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Re: JB-Weld application when COLD...???

Post by JerryB »

Doc are you still working on that wood splitter? I can't begin to think of how many tubes of JBWeld I have gone through.
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Re: JB-Weld application when COLD...???

Post by Pitchy »

Yep as Old No7 said, if ya want it to dry faster heat the area with a hair dryer but not to much or it will run on ya and you`ll sit there with a stick keeping it in place.
It will cure in the cold just take longer. :)
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Re: JB-Weld application when COLD...???

Post by Chuck 100 yd »

Epoxy that cures slowly will be stronger than if it cures fast. There is a limit to how much cold they can take though. Sometimes I just put a light bulb near by and cover with something to help contain some of the warmth.
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Re: JB-Weld application when COLD...???

Post by M. M. Wright »

I sometimes use a heat lamp and shine it on from a safe distance. As I recall they say 70 degrees F is a minimum but I know I've used it colder.
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Re: JB-Weld application when COLD...???

Post by Sixgun »

I had this leaky copper pipe in the basement at the fitting that feeds the water for the outdoor hose and it was in an area that I could not get a torch to....I shut the water off and did not feel like waiting a day for the jb weld to cure....so ...after mixing up the jb weld I also mixed up some 2 part liquid epoxy.....the five minute kind........maybe 20% in volume to the jb weld.......mixed the whole shabang together....slopped it on....and in the morning I turned the water back on....no leaks.....

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Re: JB-Weld application when COLD...???

Post by gcs »

Not quite the same but I had to make a polyester putty patch on a boat one time during the winter. I mixed it a little hot, put a chem, shake em up hand warmer over it and taped a plastic bag over the whole area.
Cured good overnight, and is still there over 20 years later.
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Re: JB-Weld application when COLD...???

Post by stretch »

I usually put a little ceramic space heater on JB Weld or Bondo to cure
'em when it's chilly.

Not that body work outside when it's 35 F is all that much
fun, but a little tarp tent and a space heater at least lets the
stuff cure. Warm the parts a little and put the tubes of goo in
your pocket for a little while to warm 'em up, apply as above
and you're usually good to go for anything epoxy-based.

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Re: JB-Weld application when COLD...???

Post by marlinman93 »

Heat is one of the few things that will make epoxy let go, so be careful not to heat it too high while curing! I've used heat often to warm parts before applying epoxy, but I wouldn't keep the heat on the epoxy unless you keep it far enough away to not get the surface temps over maybe 110 degrees.
If I'm trying to get epoxy off, I use my heat shrink gun to heat it, and it always works, unless it's some special high temperature epoxy.
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Re: JB-Weld application when COLD...???

Post by Blaine »

There are many kinds of JB Weld. Chances are they are different. I'd look at your packaging.
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stretch
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Re: JB-Weld application when COLD...???

Post by stretch »

Well, it's good to 500 F when cured, 600 F
for a VERY short time, and up to a constant
450 F.

Non-Toxic, but they don't advise eating it.
(Anybody having any experience adding it to
their favorite dish, please DO share......)

Microwave safe. Fix the handle on yer favorite
coffee mug..... (Food contact safe ?!)

Like MarlinMan, I would warm things only to
the "warm to the touch" standard while it's curing.

See the FAQ link below....

https://www.jbweld.com/pages/faqs

-Stretch
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Re: JB-Weld application when COLD...???

Post by piller »

Heat lamp, or a regular incandescent bulb to keep it just warm enough to cure within 24 hours or thereabouts has worked for me in the past. It will cure in 40 to 50 degree temperatures just fine, just a little slower than at 70 degrees or above.
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