JB Weld

[GaryD]

Someone posted an answer to one of my post and said he used JB Weld to fix the problem. I've heard of the stuff and thought it was just another glue. After some research on the stuff, it looks like a miracle product that will fix just about anything. So now I want the REAL scoop on this stuff and ask the experts here on what they think of JB Weld. Is it all that it's cracked up to be?? Thanks in advance.

[nubs77]

YES

[longrider1951]

I'll give a strong second to that yes!

[Garry in AZ]

I've used JB Weld with success many times, on everything from fixing a cracked aluminum casting to repairing the plastic mounts in my backrest. It's very good stuff, and comes in very handy. Just keep in mind that it's not a substitute for actual welding and don't rely on it for critical fastening situations. But the stuff is quite amazing.

Garry

[ChopperBob66]

Yes, JB Weld is great stuff. But, IMHO, Belzona is even better. And you can get Belzona for specific applications, i.e.- type of metal it is being used on , temperature requirements, etc.  Hell, we even use it at the nuclear power plant where I work. Have used it for many applications, for many years and the stuff works great.
Bob

[Phu Cat]

Have to agree with the above.  Just used JB weld to fix a well nut at the top of our EG fairing.  Not a lot of strain on it, but a fair amount of vibration at low engine speeds.  It's good stuff for what it's intended to do.  The hardener makes the 'steel' get hard so there must be some kind of (exothermic?)reaction.  It's more than just a glue, I'd say.



PC

[GaryD]

Will Belzona work on plastics and where can you buy it? Expensive??

[DblackmanC]

I've used JB Weld with some success in the past but everything lately has failed. Baffle for muffler...broke 1st ride., Metal H-D emblem to fastener....about week before it came loose., JB'ed some bolts in a hole with some sticking out both sides....one day., Bracket on a heatshield...one day. Not what I've seen from it in the past but I think I'll try something different now. (Maybe my tube is old...does it go bad?)
Dan

[RainDodger]

A similar thing to JB Weld that I've found to be excellent is a product called Marine-Tex, available at most any boat place. You can even drill and thread the stuff. Amazing. The best part of it is, if you don't want to wait the usual 24 hours for a full cure, if you have an IR heat lamp bulb around, it cures in something like 15 minutes!

[ChopperBob66]

I've also drilled and tapped Belzona. It's also machineable. I've used it on large heat exchangers (more than 36 in. diameter) at refineries to repair gasket surfaces. And then used a flange facer to machine the surface.
I've got one of the Belzona 1111 kits I bought at Grainger over 8 years ago, and still use it. It seems to have a long shelf life.
They do have a product for flexible parts repair.
Go to their website and read some of the amazing case studies where it has been used. Belzona.com

Great stuff.
Bob

[Showdog75]

Just don't use any on aluminun that you might end up having to get welded later , it's a real pain 2 deal with Tig welding.

[bhubb7]

I use JB om a small 5 hp brigs on a go cart had a hole in crank case were the rod broke used a nut and bolt with 2 big washers on either side of crank case with JB in between them. It ran for 3 or 4 years with no oil leak at all.I think that is very good because it is a high vib and high temp area.

[ross hog]

 2nd. on the Marine-Tex, that stuff sure works ...ross

[the Grump]

I've used JB Weld successfully a bunch of times, but I think Marine-Tex is a little better. I put that on a hole in my primary case. It was 3 or 4 years later I decided to have in welded. And then only because I was tearing the motor down. I've never tried to tap it like they say you can, I'd have to see that to believe it.

[IBARider]

The only time I ever used it was to put a fin corner back on an ironhead head.  10 years ago and it's still holding.....

[takwolf]

Doesn't work on high heat, like exhaust pipes, or heat shields.

[NormL]

JB weld is great.  I'm using it to fill in the egged out holes in my banana caliper.  So far, very good.  For high temps use Devcon, machinable epoxy.  

[Beerad]

JB Weld is great so is bailing wire and duct tape.

[truck]

Did anyone ever hear of Lab Metal? They used it in the machine shop I worked in back in the 60's and 70's. Is it still around possibly under a different name.
A quart can of that stuff weighed about 10 pounds. They used it to patch holes in steel castings and it was machinable.

[Ridetard]

Doesn't work on high heat, like exhaust pipes, or heat shields.

Im sorry,but your statement is not accurate.  I have an exhaust stud held in place with JB weld for 5 years now.
Still holding strong.

[02roadcling]

You are both right. Shields change size and flex too much. The stud is in the head.

[Ridetard]

Have to agree with the above.  Just used JB weld to fix a well nut at the top of our EG fairing.  Not a lot of strain on it, but a fair amount of vibration at low engine speeds.  It's good stuff for what it's intended to do.  The hardener makes the 'steel' get hard so there must be some kind of (exothermic?)reaction.  It's more than just a glue, I'd say.



PC

I assume the holes were rounded out from vibration?
Try this, glue a metal washer behind the cowl and use the washer hole for you grommet.
Will never wear out again.

[4DWUDS]

Is there a way to keep JB from sticking to parts surrounding the part you want to fix ?. As in a wallered out hole that a pin needs to be in. Can you put something on the pin to keep the JB from sticking to it while allowing the JB to adhere to the hole with the pin in the hole.

[seattledyna]

wipe the pin with dielectric grease or vasoline

[Emptypockets]

  I had a older Beemer that I laid down fairly hard. Punched and scraped a hole through the valve cover about an inch or an inch and a half in diameter. I was pretty poor at the time and used JB Weld to seal it after I had cleaned it pretty good. Rode it like that for four years or so. The thing would have lasted forever. It wasn't pretty, but it worked really well. Seaped a little is all.