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3475 Views 3 Replies 4 Participants Last post by  pcsailor
Here in Vermont I usually invest in some form of undercoating to help protect the underside of a new car. I have had good results using Fluid Film in the past * I see they now list a warning about compatibility with manufacturer paints, etc. Has anyone used this coating, or have a recommendation for another treatment option?
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I live in Minnesota, but I don’t get undercoating anymore. New cars just don’t need it.
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I would say depends on where you live.
In Canada, many places salt the roads regularly, which will eat through your car.
My last 1996 Civic I had for 22 years, replaced rusted gas lines, brake lines (1,500), rusted gas tank (400), drivers side floorboards (600), paint job(thousands), ...
I wish I had rust proofed. Actually sold it to a welder, that was going to redo the entire unibody.

I use Krown annually on both my newer Hondas, 100/year is cheap compared to the alternative.

If you don't have salt issues, I would probably not rust proof.

Nice report here by department of defense, that uses Krown on all their vehicles.
I pick up my Insight this week (2019/01) and looked into the undercoating. I decided against it for a few reasons. One, when you look at the bottom of the Insight, you do not see the complete undercarriage. The engine area has a large protective tray and the dealer seems to think there was more then one tray protecting the bottom. (Can anyone confirm this?). The service dep't did tell me they DO NOT remove these trays to undercoat, they simply undercoat the tray. So the mechanical components (above) the tray are left unprotected. A waste of money IMO.
Two, what I did do was opt for the Xzilon Corrosion Protection I'm having some trouble with a web link to it but there's a short video. Basically, a electronic module is installed under the hood which provides a positive (or negative) electrical charge to the vehicle. What this does is 'persuade ' the electrons to remain in place and not start a corrosion process. FYI, corrosion (rust) starts because of an imbalance of electrons causing the electrons to want to regain a neutral status, similar to a battery or two buckets of water connected with an open pipe.The water will seek an equal level.

I've been using this technology for years on ships via Cathelco. I know Cathelco works, very well. We'll see about Xzilon.

If done correct, this should end corrosion on the vehicle, or at least to very minimal.

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