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  1. #1

    Default Undercoating Pros and Cons

    I have a new Silverado and live in MI the salt capital of the U.S. I am thinking of getting the truck undercoated. Does anyone have opinions of getting a vehicle undercoated or not? For those that have their trucks undercoated who did you use and were you pleased? Thanks for any information.

  2. #2
    Sr. Apprentice
    Join Date
    Aug 2009
    Location
    South Central Nebraska
    Posts
    65

    Default

    I just bought my truck. The previous owner had an undercoating/rust stopper put on when he got it new. It now has 25k on it and the stuff is already flaking/peeling/chipping or whatever you want to call it from driving on the gravel. Not sure how it works with salt, just my expirience.


    2007 Z71 Silverado 1500 LT NNBS
    5.3L
    Custom Dual Exhaust
    2.25" ReadyLift
    285/65-R18 Kumho's
    Factory Steps
    Big Tex Cattle Guard
    Delta Pro Tool Box
    Chrome Door Handles
    WeatherTech Floormats
    Spray In Bedliner

  3. #3

    Default

    they are good, but they need to be well maintainted. mine is very flaky at 278,000 km, and the frame is starting to have surface rust as the paint peeled with the undercoating, but its still intact in some places. if you are willing to have it redone every few years, its a good idea.

    2008 FORD F350. My new all-around truck.
    2001 Silverado Reg. Cab Not-So-Base -- SOLD
    2003 Avalanche Z71. No Cladding. Check out my Mod thread. - Crashed. Will be rebuilt soon.
    1974 Triumph Spitfire 1500 - Work in Progress
    2003 Sierra 3500 Duramax. The Newer, Better Work Truck -- FOR SALE


  4. #4

    Default undercoating voids warranty

    If you undercoat, you void the corrosion warranty.

    I know, I am suing GM now for undercarriage corrosion.

    Best think is wash the undercarriage to keep salt off it and park in garage if possible.

  5. #5

    Default

    Quote Originally Posted by kendonhank View Post
    If you undercoat, you void the corrosion warranty.

    I know, I am suing GM now for undercarriage corrosion.

    Best think is wash the undercarriage to keep salt off it and park in garage if possible.
    I should also add that anyone else's should hold up better than mine. my stepdad NEVER washed the undercarriage - first time was 7 years later when i did it. salt was never kept off - probably contributed to my peeling/flaking rocker panels. and not always parked in garage. some dealers do undercoating that should be covered by corrosion warranty as it is dealer-installed, such as on my moms buick lucerne.

    i digress a bit, but oh well... the dealer my dad works for had a bit of a mishap a couple of years ago when they were undercoating a truck. the truck was not put on the lift properly and the slid off on one side. this left it hanging only by the frame on one side of the truck. luckily the frame of the 07 silverado HD they were working on was strong enough that it didnt get damaged in this incident except for scratching the new undercoating off where it rubbed.

  6. #6
    Master Mechanic daddytech's Avatar
    Join Date
    Mar 2008
    Location
    Portland TN
    Posts
    672

    Default

    Wonder if that Rhino liner would work as a good undercoating or not ...

  7. #7

    Default

    I also was kinda curious on this, The pickup i bought has some rust issues on the lower side skirts and cab corners, i had an idea of tryin to get as much of the rust off as possible, then hitting it with 3M's rubberized coating to try and slow it down...


    anyone done this or bad idea?

  8. #8
    Master Mechanic tattooed4life's Avatar
    Join Date
    Apr 2008
    Location
    Stevensville MI
    Posts
    886

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    I've been pondering doing the same on my truck. The 2 things holding me up--#1 do I want the rockers black? and#2 the time the truck needs to be down for it to "cure". I better decide soon, Michigan winters are coming soon and this is definantly a summer job.
    1997 Chevy K3500
    4x4 X-Cab Dually
    454 Dual Exhaust

  9. #9

    Default

    Quote Originally Posted by suede View Post
    I also was kinda curious on this, The pickup i bought has some rust issues on the lower side skirts and cab corners, i had an idea of tryin to get as much of the rust off as possible, then hitting it with 3M's rubberized coating to try and slow it down...


    anyone done this or bad idea?
    Rust needs two things, oxygen and moisture. If you just clean it and cover it the small amount of rust left still has oxygen in it and will continune to grow. You might try cleaning it and using a product called pour 15. It actually bonds with rust and stops it. I used it with and old F-150 and it stopped the rust for years. It's expensive $40 per quart and has a short shelf life if you leave the lid open. Humidity is what cures the stuff.

    http://www.por15.com/

    Good luck.

  10. #10

    Default

    Quote Originally Posted by tattooed4life View Post
    I've been pondering doing the same on my truck. The 2 things holding me up--#1 do I want the rockers black? and#2 the time the truck needs to be down for it to "cure". I better decide soon, Michigan winters are coming soon and this is definantly a summer job.
    I am on vacation now but when I return I am going to check with GM to make sure Ziebart does not void any warranty on the truck. I am also going to check with the Ziebart people to see how they avoid spraying the internal locks and such. Their product tends to gum up moving parts especially when it's cold. If all the answers are correct then I'm going to get mine done before winter sets in.

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