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Old 03-15-2006, 12:00 AM   #1
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Default Undercoating suggestion.

Well with the new car ( 90 SSE) we plan to keep that thing undercoating all the time, at least once a year.

I am just looking for suggestions as to what to go with. The last time we did the white SSE, it was a clear wax kind of stuff, that once heated up in the summer it tended to leak.

Then there is the old oil spraying, which has been around for years.

There is another one up here called Krown, not sure if it is available in the U.*. I have been told that unless you use this Krown from day 1 of owning the car it will go after the rust you currently have and actually make it worse.

Then there is a new one I am hearing about called Corrosion Free. I am not sure if that is the same as the one I used previously ( wax type substance), but I hear it is very good.


What have you all tried and what has worked?? I guess it might be different for me since I have salt to deal with compared to some that live in the warm south, hehe.
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Old 03-15-2006, 12:12 AM   #2
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The corrosion free is the waxy stuff. It gets a little tedious getting off in summer (had put on both my LaCrosse and Bonny by dealer.) Suppose to be top level and the brand I got carrys a 10 year garauntee against corrosion through the GM dealer, not third party so I thought thats was cool.
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Old 03-15-2006, 12:42 AM   #3
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i always thought that a undercoating traps moisture therefore promoting rust
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Old 03-15-2006, 01:01 AM   #4
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Well I was reading more on the website for corrosion free, and here are a few things on it

Quote:
•Terminates rust and corrosion in all metals
•Clean, clear, DRIPFREE - no sticky residue
•Dissolves and neutralizes existing rust and corrosion
•Penetrates the start of new corrosion
•Protects paint from blistering at edge of lapped seams
•Stops electrolysis between dissimilar metals
•Protects UnderBody including brake and fuel lines
•Penetrates deeply and lubricates
•Repels salt water and moisture
•Will not wash off with water
•Heavy Duty gel formula for extended protection
The biggest reason why we use an undercoating up here is that with all that salt you want some kind of barrier between the salt and the metal.

This Corrosion Free stuff sounds to be pretty good, if it does what it says it does.

Here is one thing I found on the FAQ page.

Quote:
Does Corrosion FREE apply a black undercoating to the bottom of the vehicle?
No, that'* very bad for today'* newer vehicles! Black tar like or waxy coatings are just a 'cover up'. They seal moisture against the metal and in most cases when they flake or peel off, rusty holes appear on the previously coated surface. Because Corrosion FREE product is clear and you can see through it, you know it really works. It makes the underbody look great too.
So YES the traditional oil spray does trap moisture in, but this stuff is designed to pull moisture out, kinda like WD-40 then, hehe.

Only thing is that this stuff is over 100$ to get it done, well to get the whole car done that is, not just the underside.
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Old 03-15-2006, 01:27 AM   #5
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Yep, and they do everything its on my wheel wheels, under hood, door hinge area, trunk.
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Old 03-15-2006, 02:16 AM   #6
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You might want to look into this company. It was the NASA Spinoff Company for 2003 (selection is done by NASA). I have used their ceramic insulating paints for radiant and conductive heat applications with exceptional results.

They also have industrial metal treatment paints. i don't have extensive experience with them. I used a couple of their rust/primer products to undercoat a friend'* car at the NJ seashore. It'* only been 2 years, so it'* hard to comment on its effectiveness. But subjective results seem in order.

http://www.hytechsales.com/index.html

Click Paint Listings>Primers. See if there is anything of interest.
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