Re: Rust converter by Quest Chemical

Posted by Rod (NH) on June 14, 2007 at 17:39:17 from (64.140.200.138):

In Reply to: Rust converter by Quest Chemical posted by 2cylinderlp on June 14, 2007 at 13:47:04:

Hi,

I haven't used the Quest product but will say there are loads of "miracle" rust treatments out there that all claim to solve the problem with rust. The tech sheet for the Quest Rust Converter suggests it is a water-based product that appears somewhat similar to either the Loctite "EXTEND" Rust Treatment or the Permatex Rust Treatment, which is the same stuff as the Loctite.

I've used the Permatex product before. It should be readily available at your local NAPA store. I had excellent luck with it on an AC-B gasoline tank but terrible luck with it on a Chev truck roof. The truck roof problem could have been my own fault by applying a lacquer-based primer over it. I don't know for sure since there was no caution about doing that in the product instructions. My mixed experience with it has led me away from it to other products.

The best solution to rust is complete removal, usually by bright-metal sandblasting. However, I realize that is not always feasible or practical. For those specific situations, where there is light-to-medium rusting, I now use Picklex 20 as a prep before epoxy priming. The Picklex is a phosphoric acid-based product. Where the rust is more significant, I now use POR 15.

The Permatex product is easy to use and resonably non-toxic. I suspect the Quest product is similar. The Picklex 20 is also easy to use and I have had excellent luck with it so far. The POR 15 is a little tricky to use because of the required prep but I think it is the most robust of the "rust treatments" I've tried. Unfortunately, it is also quite toxic, being a one-part, moisture-cured, isocyanate product. Breathing the fumes or overspray can be hazardous to your health. Supplied-air respiratory equipment is advised. Wherever I've used the POR 15 in the last couple of years, I've had excellent luck with it - so far. It is brutallly tough stuff when cured. I've never seen a brush-applied product flow out as nicely and as easily as the POR 15.

There is another "rust paint" that I have tried, called Zero Rust. My very first (and definitely last) experience with it was extremely disappointing. I didn't get through one square foot of application before I decided to toss it and do the project with something else. Unlike the POR 15, it is the most difficult paint to brush-apply that I have ever seen. It should be thinned but the can label prominently displays a "Do Not Thin" caution. There are absolutely no other label usage directions and the manufacturer's on-line instructions are self-contradictory. I find that to be totally unacceptable and cannot recommend the stuff to anyone. There are others that seem to rave about how good it is, but it's not for me.

Regarding the Quest product; If the manufacturer is unable to tell you where you can buy some, either locally or on-line, I'd find another product. Even if you can find a local distributor, you may find he carries some of the Quest products but doesn't stock the product you want. It then becomes a special order and he may not want to do that w/o delays because of minimum purchase requirements or something. You may know that drill. There are plenty of options out there and I doubt the Quest product is sufficiently "better" than others to justify much bother in getting it. I've purchased both the Picklex 20 and the POR 15 from on-line souces which have been easy and quick, shipping by UPS.

As always, YMMV.

Rod

Replies:

• Re: Rust converter by Quest Chemical john_bud 05:13:55 06/17/07 (1)
  • Re: Rust converter by Quest Chemical Rod (NH) 16:03:22 06/17/07 (0)
• Re: Rust converter by Quest Chemical 2cylinderlp 22:09:56 06/15/07 (1)
  • Re: Rust converter by Quest Chemical R Matthew Songer 12:46:41 06/25/07 (0)

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