JB Weld????

BLUEBONNET2 · Sep 29, 2004

anyone one use this product around heat? i have a break in my "smoker". don't have a welder available, so i just need to repair a seam....most of the heat will be in the fire box, however, i don't want to lose the heat and smoke(less than 500 degrees)...do most of the smoking under 300 degrees....

thanks,
bluebonnet2

JerryG · Sep 29, 2004

I put JB weld in some very large dings that were in a motorcycle cylinder head. The dings were caused when a piston self destructed. I ran it with the JB weld for about 4 years with out any problem and it gets hot in a 500 cc two stroke engine.

slowrev · Sep 29, 2004

I recommend finding some stove putty. Used for sealing wood stoves and such. I think Lowes has it, not real sure on that though. Seals good and handles heat real well, not a lot of strength but works well for what it is, a sealer.

Ben

bobodu · Sep 29, 2004

Sheetmetal screws and a patch.Coat of high temp RustoleumRED!! Gotta match the tractors /forums/images/graemlins/grin.gif

slowrev · Sep 29, 2004

On the subject of JB weld... It is good stuff and I like it. A cousin borrowed my tractor and was using the loader to move some junk pickups around... well one broke loose and swung in and a piece of steel poked in and broke the front mounted crank driven pump totally loose from it's mounting base. Pump was intact just broken loose from the mounting base.

Well considering a new one is over 600.00 I cleaned it up good with acetone and JB welded it. that was about 3 months ago and it is still working great.

I also know people that have used it on gas tanks and cracked water jackets with good success.

btw I have since welded up a 3/8" plate guard around the pump to prevent a re-occurance...

Ben

PineRidge · Sep 29, 2004

On my last tractor I had a 3/16 hole in the exhaust manifold casting that I patched using some JB Weld. I wire-brushed the hole and used the flat of a screwdriver to smooth some in place. I really didn't think it would hold for long since the manifold got so hot but it was still in place the day that I sold the tractor 2 years later. Now I always have JB Weld lying around just in case.

Ken_CT · Sep 29, 2004

Excuse my ignorance, but what is JB weld?

DocHeb · Sep 29, 2004

Why its just the greatest thing since sliced bread and Marvel Myster Oil! /forums/images/graemlins/shocked.gif Its better than duct tape, but only because its harder! /forums/images/graemlins/shocked.gif /forums/images/graemlins/shocked.gif It's the answer to "OH GREAT, WHAT AM I GOING TO DO NOW?!" /forums/images/graemlins/shocked.gif /forums/images/graemlins/shocked.gif /forums/images/graemlins/shocked.gif

From the JB Weld Web Page:

"Cold weld virtually any combination of iron, steel, copper, aluminum, brass, bronze, porcelain, ceramic, marble, glass, plastic, concrete, fiberglass, wood, fabric, paper ... just about any porous and non-porous material! "

I must admit, it really does work pretty well.

Cliff_Johns · Sep 29, 2004

Gosh, based on the web page, you'd think there was no reason to ever actually weld something. Just smear on some of this stuff and get a cleaner, faster, safer weld every time!

So what's the reality? The strength numbers on the web page imply that I could make a Back Hoe just by glueing the parts together with JB-Weld.

Cliff

Mark4510 · Sep 29, 2004

I am less than excited to admit I have gotten pretty clever with JB Weld just fixing my "Fixes" /forums/images/graemlins/shocked.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/frown.gif

I have created enough of these "opportunities" for myself that I can say with some confidence it is great stuff.

mark777 · Sep 29, 2004

Ken, JB Weld is a packaged 2 part system of chemical paste that when mixed in equal parts has the consistency of very thick tooth paste. Given a short amount of time - depending on ambient temp....or applied heat (like hair dryer) cures fairly fast, strong and very hard.

I have applied it to machine parts and actually turned them in a lathe. It is in at least two of my tool boxes, both car and truck, at home in the kitchen drawer.

The most amazed if have ever been is when I applied it to a broken ear on a transfer case when we were at Pismo Beach during the sand drags. Snaped the ear off when we were unloading it from the trailer. During those days (on a Saturday) Not likely to find anyone around with a welder.
Mark

theonlybull · Sep 29, 2004

i'm glad to see that it works great for some ppl.

mainly, i see that cleanlyness is very important.

running a machine shop, we see tons of stuff come in with jb weld on them, that have failed miserably, or have since broken. most of the time, the jb prevents us from being able to fix the part, or at the very least, doubles the price of the repair.
please keep this in mind if you may need to actually repair the item down the road.

have_blue · Sep 30, 2004

</font><font color="blue" class="small">( i'm glad to see that it works great for some ppl.

mainly, i see that cleanlyness is very important. )</font>

If used to patch holes and for repairs with low strength requirements, it's great. The most common mistakes in using JBWeld are (as you say) cleanliness, and trying to accelerate the cure with heat. You can accelerate the cure just fine up to about 120F, but if it gets much warmer than that, it makes a spongy, weak goo. In fact the slower it cures (within reason), the better.

It's saved my bacon on many occasions. Great stuff!

Soundguy · Sep 30, 2004

I prefer top think of the strength of jb weld as that of plastic.

It is sandable, fileable, and drillable.. and I've tapped it for non load bearing situations.

Usually when i fix something with jbweld.. I also add a small piece of metal strapping as a stiffener in the mix.

The JB-weld 'water-weld' epoxy stick also works great.. water/oil/gas resistant.

Soundguy

mrcaptainbob · Oct 4, 2004

I used it directly on an auto exhaust manifold where some EGR tube snapped off. Cleaned the area as best I could, smeared some JB on it, it worked far greater than I had thought it would! Aobut 8 years ago! I'm a believer!

chucko · Oct 5, 2004

Have you guys ever seen or used "PC-7"? I am not sure about heat but when mixed right it is a lot stronger than JB

mrcaptainbob · Oct 6, 2004

Never heard of "PC-7". Where do you get that? By the way...about that JB Weld....my son mixed up a large batch of that (maybe 3/4 cup's worth) and set it into a cavity that needed 'filling' to bring it back to normal surface. He then warmed it up a bit and that JB just settled in as smooth as if it was machined!

chucko · Oct 6, 2004

pc-7 is at most "real" hardware stores comes in a black and red tube or cans. I have seen it used to hold a broken starter flange and to glue wood to glass

quick search on the google fond it here http://www.right-tool.com/pc7epoxypaste.html

chucko · Oct 6, 2004

more/better info here http://www.pcepoxy.com/images/pc7data.htm

PineRidge · Oct 6, 2004

About a year back I put a small bit of JB Weld on the backside of two quarters and stuck them to one of the tables in our shipping area. You know it's funny, many folks here have tried to pick up the change but no one has yet been successful. /forums/images/graemlins/wink.gif