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66GMC 07-07-2005 06:12 PM

Rust Dissolver versus Rust Convertor?
Hi folks,

I read thru most of Randy Ferguson's excellent post on how to use Naval Jelly which is used to dissolve (surface?) rust.

The implication in that thread seemed to be that rust "convertors" didn't work very well?

It seems to me that they are intended for 2 different (but similar) purposes. I see naval jelly being used on accessible areas to remove surface and "flash" rust, while rust treatment would be used in all of the "nooks and crannies" to seal and protect? This might also be good for pitted areas?

My impression of the naval jelly is that you have to make REAL sure that you rinse it off very well, or any moisture later would re-activate the acid?

I have never used either of these products yet, but plan to do so quite soon. Can anyone confirm or deny my beliefs? I'd really like to do this right... :)

I did a little bit of my own research on these items at Permatex's website as well as pulling a couple of bottles of of the shelf at our NAPA store. Here is what I have found:


Permatex Canada uses NJ-1C (UPC 80594) as a part number for the 236 ml size and calls it "Rust Dissolver Gel".

"Contains Phosphoric Acid ..."
"Rust Dissolver Gel removes rust by powerful chemical action. Applies easily with a brush. Rinse rust away in just minutes. Adheres to vertical surfaces. Provides 24 hour flash-rust protection for priming, painting or other finishing."

Rust Treatment (I believe this to be the same as "Rust Mort" that several others have mentioned.)

Permatex Canada uses 81387 as a part number for the 946 ml (1 US QT) size and calls it "Rust Treatment" - "Destroys Rust!".

"Contains Vinylidene Acrylic Copolymer ... Barium Sulfate ... and a whole lot of other nasty-sounding stuff :) ... cancer-causing, birth defects, reproductive harm..."

- Destroys old rust and prevents new rust.
- Can be used with body fillers and fibreglass
- Dries to a tough protective primer coating
- Seals and protects metal.

There is a lot of good information in the directions as well, but I don't have the time to type it all out right now.

Highlights (paraphrased in my own words):
Scrape or wipe dirt and oils.
Sand or wire brush rust.
Pour into seperate container, do NOT contaminate the unused portion - chemical reaction.
Brush or sponge a thin layer. Apply carefully, product will stain surrounding paint. Remove splatters with water and detergent immediately.
A black coating will appear in 15-30 mins, apply a second coat within 20 mins.
Allow 24 hrs protected from moisture before topcoating.
Acrylic Latex paint requires a primer/sealer before painting.
Laquer/Enamel may be painted without a primer.
AUTOMOTIVE APPLICATIONS: Allow an extra 24 hrs drying time before topcoating. Use sandable primer and 120 grit paper before topcoating.

Thanks for taking the time to read all of this, and all replies, comments, and advice will be greatly appreciated! :thumbup:


AhX 07-08-2005 06:51 AM

while I am not the best body man in the world, I have used the converters and have had no luck whatsoever withthem. My 88 blazer is rusting through already where I used it. Next time I will be using the naval jelly to verify that all the rust is GONE not "converted"

Bee4Me 07-08-2005 09:45 PM

Rust NEVER sleep's. You may put it to bed but it will eventually wake up. :pain:

evilone 07-09-2005 03:26 PM

Im with you Bee4me

rbfpezcore 11-05-2005 08:49 AM

So is Naval Jelly just another temporary solution then? The only way to really RID the car of rust would be cutting and welding?

oldred 11-05-2005 09:57 AM

"Destroys rust and PREVENTS new rust"- MUST be true if it says so on the label :D

mitmaks 11-05-2005 06:26 PM

only thing that works is por15

chadsbodyshop49119 11-06-2005 01:47 PM

BAH!!!! i've had rust come through Por15 so i'm not a true believer.. although I do think it's probably the best one out right now.... but the way i see it is have that stuff blasted if you want to stop the rust, or cut and well that's all folks

mitmaks 11-06-2005 05:41 PM

been 2 years since ive coated trunk pan in my charger, oh sits ouside through rain/snow and water gets in trunk due to bad weatherproofing. No rust yet

chadsbodyshop49119 11-06-2005 05:48 PM

I've only seen it come back one time.. So I don't get it but it makes me a little leary... like they say rust never sleeps

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