JB Weld and heat question?

[NedFig]

How hot can JB get before it starts to break down? Is it safe to get it around 300 degrees? I got ahead of myself this weekend while fitting a guard to a tang?

Thanks

[Martyn]

LOL

If it breaks down in the temper, just remove the guard, clean up the parts and re-glue after temper.

[jdlange]

It is supposed to be resistant to 500 degress, this is after full curing which is 15-24 hours. So 300 degrees shouldn't be an issue.

[jdlange]

I don't think I have ever gotten it to 300 degrees before but I have gotten it pretty darn hot and not had any issues.

[mike koller]

Well....

It tends to change color around 400* and at 500* you still catch the devil trying to get it to let go. :evil

Or so I have heard ...nothing every goes wrong in my shop. ...we need a smiley with tall rubber boots.

If you have never tried taking a guard off that has been J.B.'ed in place go for....just have some more guard material handy.

Good luck and hope this helped some.

[DC KNIVES]

Well I have used the stuff for years on motor blocks and heads and never had a problem.Just one thing, the surfaces must be impeccably clean prior to assembly.Dave

[NedFig]

Well, I did it last night, @ 1 hour @ 400 degrees. The guard is still solid as a rock.

Thanks for everyones help!

[TDB Knives]

Well lets see.....!!!
Depends on which type of JB weld you used.
I know of two types. Look at the two tubes. If one is RED (Hardener) and the other BLACK (Steel), then its suppose to be good up to 600 degrees farenheit. I think the other type is a tube that is tan in color. that one is either 350-425, not sure about that one, but I'm sure about the Black & Red.
:cool:

[Raymond Richard]

The other JB Weld has a rating of 300 degrees. Its also guick set. Tan and blue if I remember. Still like the regular JB but the other is fine if your in a rush but has to be used quick or it will set up on you before you know it.