Un-welding JB Weld?

rfrink

rfrink

Joined
Aug 1, 2000
Messages
863
I love JB weld.....but found where I need to un-weld it. I've used it to glue a thin piece of metal to a thicker plate...and I'd like to get them apart without damaging the thin metal...so prying is out of the question.

I haven't tried anything yet..

How about heat? Solvents?

Thoughts?

-Rob
 
JBWeld may take a little more than 400F. I used it to temporarily patch a pinhole leak in a header flange on my firebird once...it held for over a year before it started leaking again...

-d
 
Rob, What I have done in the past is heat up a chunk of steel and then set the glued item on top. Your nose will tell when its ready to let go.
 
Good info! I've heated epoxy to soften it..no probs...but I kinda put JB weld on a different level than your basic 5 minute epoxy.

Deker, That's too funny! A firebird, headers, and JB weld. Duck, 'cuz i think there's a ton of redneck jokes heading your way.

"You know you're a readneck when..."

(posted in fun of course)

In fact...that's a pretty darn good testimonial for why I love JB weld!

-Rob
 
rfrink said:
Good info! I've heated epoxy to soften it..no probs...but I kinda put JB weld on a different level than your basic 5 minute epoxy.

Deker, That's too funny! A firebird, headers, and JB weld. Duck, 'cuz i think there's a ton of redneck jokes heading your way.

"You know you're a readneck when..."

(posted in fun of course)

In fact...that's a pretty darn good testimonial for why I love JB weld!

-Rob
Click to expand...

BMW in one of their factory technical service repair bulletins about a problem with head casting porosity causing head gasket failures in their cars reccommended that mechanics fill the porosity with JB weld and sand it flush

-Page
 
sunshadow said:
BMW in one of their factory technical service repair bulletins about a problem with head casting porosity causing head gasket failures in their cars reccommended that mechanics fill the porosity with JB weld and sand it flush

-Page
Click to expand...

I respectfully retract my "redneck" comment....and replace it with "yuppie". :D:D
 
JBweld is my favorite 2 part epoxy for all the reasons stated above. That said, it will burn out with enough heat, the question is, how hot can you get the pieces you want to separate?
 
JB Weld requires more like 600 degrees from what I have read.
 
I JB welded a Suzuki motorcycle exhaust to an adapter plate I had attached to the exhaust port on a riding lawn mower. After a short time the JB weld turned brown and began to flake of from vibration.

I have no idea how hot the exhaust from a 12HP Briggs and Stratton engine is, but that is what you would need. :)
 
Magical properties have been attributed to JB Weld. It is simply epoxy with powdered metal mixed in. Heat will break it down.
 
I have removed wood scales from a knife that I had used JB weld on. I do not recall what temp I used but it was not excessive (less than 400F).
 
rfrink said:
G
Deker, That's too funny! A firebird, headers, and JB weld. Duck, 'cuz i think there's a ton of redneck jokes heading your way.

"You know you're a readneck when..."

(posted in fun of course)

In fact...that's a pretty darn good testimonial for why I love JB weld!
Click to expand...

That Firebird is sitting with no motor now, next to the '73 Dart with 3 flat tires. Across the driveway is the S-10 Blazer that has an electrical short and that all the brake fluid fell out of, but between them is the Hyundai that cooked the driver's front brakes the other week....what're you tryin' to say? :D

-d
 
deker said:
That Firebird is sitting with no motor now, next to the '73 Dart with 3 flat tires. Across the driveway is the S-10 Blazer that has an electrical short and that all the brake fluid fell out of, but between them is the Hyundai that cooked the driver's front brakes the other week....what're you tryin' to say? :D

-d
Click to expand...

Hey Deker, what's that dart got in it? I have a 74 Duster I'm building

-Page
 
You must log in or register to reply here.
Back
Top