Weldable Primer

[Laid_Out_50]

Does anyone know where I can get Weldable Primer. Can I get it at any hardware store or do I have to go to a automotive paint store

[dwcsr]

Its called Bloxide. You can get it from eastwood, Its not cheap. The nozzle will clog badly if you don't clean it after use.

[Atomsplitter]

Try your local NAPA.

[pgf545]

We bought some from the welding supply store. Somewhere on my build thread I have a picture of the can.

Bernie

[pgf545]

Here try this.

http://67-72chevytrucks.com/vboard/s...=206021&page=4

[BlueJeep]

When I bought mine, I called every welding supply place in town, and none of them had even heard of it before (should be an indicator of the level of staffing at them). I bought mine from the local Sherwin Williams auto paint store.

[Laid_Out_50]

Originally Posted by pgf545

Here try this.

http://67-72chevytrucks.com/vboard/s...=206021&page=4

I bought the same kind today at my local automotive paint store. This stuff isn't cheap. How did you like the way it worked

[hotrodsbyray]

I welded thru my primer - did you know primer catches fire and burns with a nice green flame?
LOL
The weldable primer sure isn't cheap!
In Classic Trucks magazine recently they had an article on sheet metal repair and the author stated he used that galvanizing paint. Isn't that stuff toxic to weld on?

[dwcsr]

Galvanized metal is very toxic to weld on and can make you very ill. I've had zinc poisoning twice and don't ever want it again

[pgf545]

Originally Posted by Laid_Out_50

I bought the same kind today at my local automotive paint store. This stuff isn't cheap. How did you like the way it worked

I liked the way it worked. The only thing I wasn't to sure about was it seemed like it came off easily. Like when I would clamp two pieces together and then have to move them I would almost always have to touch it up before I welded. It seemed to scratch off easily so I would question if it really worked....if that makes sense.

Bernie

[sevt_chevelle]

Originally Posted by pgf545

I liked the way it worked. The only thing I wasn't to sure about was it seemed like it came off easily. Like when I would clamp two pieces together and then have to move them I would almost always have to touch it up before I welded. It seemed to scratch off easily so I would question if it really worked....if that makes sense.

Bernie

The purpose of weld-thru is to protect the metal during the welding process, helps shield the molten weld puddle from air and also provides a sacifial coating.

The only time weld-thru should be used is on two or more overlapping joints, it does NOT work on a butt weld.

Weld thru also has little to adhesion therefor after welding any traces need to be removed. You do NOT want to apply paint over weld-thru primer. You only need it on the overlapping seem.

For the best weld-thru primer head down to your Ford dealer and pick up a can of this stuff, it hands down beats the crap out of any other product out there.



Part number

[robin58]

sevt_chevelle, that's interesting and apparently I've misused weld-thru primer. But it leads me to ask a question as to how to protect the backside of patch panels welded in then? For example on AD model trucks if you need to repair the lower front cowl you're left with being unable to access the inward facing portion after fixing it. Obviously moisture can still enter so how do you treat that area?

[sevt_chevelle]

Originally Posted by robin58

sevt_chevelle, that's interesting and apparently I've misused weld-thru primer. But it leads me to ask a question as to how to protect the backside of patch panels welded in then? For example on AD model trucks if you need to repair the lower front cowl you're left with being unable to access the inward facing portion after fixing it. Obviously moisture can still enter so how do you treat that area?

The backside of the weld will always be bare metal, no product out there can withstand the heat including weld-thru primer.

Ideally you want to coat the backside with epoxy primer from the beginning before you install the panel.

Once welding is done try and coat the weld, use small medical syringes, pour epoxy over the seem etc.

To finish off the corrosion protection use something like this product. Its made by 3m and called rust fighter I, many other companies have a similar product.
You can buy it a spray bomb and it has a small plastic wand perfect to get into small little holes or nooks. Spray the crap out of the backside, this product works its way into seems. Probably the BEST thing you can do to prevent rust from forming after welding.

http://solutions.3m.com/wps/portal/3...gl6DBD2W3JX1bl

3M also makes a great 36inch wand for applying this stuff, you need to buy a special gun but the gun also sprays undercoating, chip guard etc.

http://solutions.3m.com/wps/portal/3...glCMHZP9GPV1bl

EVERY SINGLE TIME I replaced a door skin, quarter panel or any other welded on part I sprayed the seems with rust fighter till it was dipping on the floor.
I dont remember the cost of a spray can of rust fighter I but its MUCH cheaper then a redo...Eric

[robin58]

Thanks a bunch. I'll be getting myself some of that stuff.