Spot welding question

[h~moto]

When spot welding together two pieces of sheet metal, to avoid rusting is there a way to treat the sides of the metal that get sandwiched together that will not interfere with getting a good spot weld?

 

[real_life_ram_air]

There are seam sealers and adhesives made for spot welding through. They can get messy and expensive. Another option is to prime the mating surfaces with a quality primer (epoxy is best) let it dry over night and then shunt the spot weld. See the below link for more info on that process.
https://rts.i-car.com/collision-repair-news/shunting-the-current-when-spot-welding.html

MC

 

[h~moto]

Perfect. Exactly what I wanted to know. Thanks..

 

[lis2323]

There are seam sealers and adhesives made for spot welding through. They can get messy and expensive. Another option is to prime the mating surfaces with a quality primer (epoxy is best) let it dry over night and then shunt the spot weld. See the below link for more info on that process.
https://rts.i-car.com/collision-repair-news/shunting-the-current-when-spot-welding.html

MC

Too cool. You learn something new every day. Thanks for posting that link. [emoji481]


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[pb57]

They make a primer just for that purpose and I have used it with good results restoring my early bronco. its called weld primer I think and I got it at my local auto parts store. Paul

 

[NYBODYMAN]

Weld-tru primer is commonly used but there are endless debates about its use.