Weld Through Primer- Effective?

[Mommy Wagon]

Does anyone utilize a weld through rattle can primer?

I have some plate to add for forward strut / down bars as well as various other structural additions, and I would like to know if anyone actually uses weld through primer on areas they will never see and environmental concerns?

Being that these areas will be completely welded and sealed off will having them left as untreated/unfinished metal create any problems in 5-10 years?

[oestek]

We use weld-thru a lot, both spray and brush-on. There is always a risk that those areas inside structures, cowl boxes, etc. will begin to rust from the inside out if left unprotected. It's cheap insurance, and it works.

[oestek]

We use weld-thru a lot, both spray and brush-on. There is always a risk that those areas inside structures, cowl boxes, etc. will begin to rust from the inside out if left unprotected. It's cheap insurance, and it works.

[DRs 69]

I use it all the time, although I have not been able to see long term how well it seals it does paint and weld over easy enough. One thing to be sure of though is when welding it to use a mask or plenty of ventilation. I have heard its somewhat like welding galvanized steel. Maybe someone will have more input on that last part.

[toxicz28]

I have heard its somewhat like welding galvanized steel. Maybe someone will have more input on that last part.

It is galvanized primer.

[TheJDMan]

I use the Eastwood weld through primer which is a high copper content. It works very well.

[ehummelman]

Gotta disagree with all of you. You're burning off whatever protection you think you're putting on there. If anything, you are only contaminating your weld and like someone said introducing nasty fumes to your lungs. Weld clean steel only, then seal it with whatever primer/paint you want - there's just no sense in painting it then burning through the paint.

[66larkgs]

i think they are more worried about what is behind what you are welding. like if you are welding a lower quarter panel and you cannot access the back of the panel. When used right it does work very well.

Paul
66lark P/T with-
t67 turbo 401 Buick Nailhead