The Stovebolt Site Forums The Shop Area Paint and Body Shop J-B Weld

I've read in past posts about Stovebolters using J-B Weld to fill holes rather than the traditional "Bondo". Is this a good way to go aside from cutting out the rot and/ or welding in new panels? I imagine it would more be dificult to work with. I know it's still filling holes. Is J-B Weld porous like bondo is? Thanks for any thoughts.

NOT very cost effective. Isn't JB Weld only available in small tubes? You'd have to buy like 2 cases of the stuff to skim coat a fender. Stick with the stuff that's made for the job. What would be your reason for wanting to go with JB Weld instead of body filler?

That stuff is hard to sand too. Bondo isn't meant to fill holes either. You'll be better off cutting out the rotted metal and welding new, it'll be stronger and last longer. Save the filler for final finishing.

if its a big hole get a fiberglass kit from napa or hardware store tape the back side of hole glass it when dry bondo and smooth will last a few years get your metal clean first

Pakrat 48, Longbox 55, 32 Fire 2,
Thanks for responding.

Pakrat 48, When I was wire burshing the bottom corners of the driver's door on my '63, I found it was really bad with rust. Nice half dollar hole on lft side. Almost as bad on the rt. Rot goes all the way through to the inside. I didn't want to just pack it full of Bondo. Was looking for a better way.
Killerdude

Like Longbox said, it sands hard. It's made to be drilled, tapped, filed and such. Besides, it would be near impossible to feather the edges, you'd always be able to see the repair. Cut out the old and patch in new metal, that's always your best bet.

I used JB weld to fix some pin holes in a stepside bed where the fender flange bolts on. just cleaned the metal with a wire wheel real good first. It sanded ok. rust never came back through and I drove that truck for years....

I've used it to fill some pinholes in my cowl area during my windshield job. I welded the bigger holes. I used it because it's waterproof and it doesn't shrink. Normal filler was used on top of that. It's been a couple of years now and no sign of rust.

you can buy a lower door repair panel. I repaired my doors using welded patches(from an old hood), then filled the corners w/brushable seam sealer to completely fill the lower corner that traps water, now they are smooth inside on the corners, water will drain out now. I did this to my 79 Ford about 7 yrs ago, still good, it is stored outside(the 2 Chevies are inside the shop),,brian

I used it on a rusty, leaky hole on the door of the dishwasher in my old house when I was too much of a bachelor to get a new dishwasher. It looked horrible because I didn't finish it smooth, but it held up to hot water. It was still there 3 years later after I got a new dishwasher.

Thank you, Gentlemen.
4onthefloor, I did hear of a fella who had an old iron duke chevy 120cid and used JB Weld to fill a crack in the block. The man said he had water squirting all over the place. This motor was in a boat. One application and it never leaked again. He did sell the boat directly afterwards.
Killerdude