Using bed liner (Herculiner, Duplicolor, ect..) for undercarriage....

[Geminiroq]

Hey guys,

I am almost ready to clean up my frame and undercarriage...some surface rust.

Has anyone used the roll on bed liner (Herculiner, Duplicoler, ect.) for undercoating the undercarriage?

My thought is that it will protect it as well as offer some sound deadning.

If so...how did you prep the undercarriage for this?

Any and all advice is much appreciated.

Thank you,

[pineymike]

I wouldn't use it for that,I use it almost every where else,But IMO on the frame it's more likley to chip/scrach and start rust under the coating in my experance once the rust under that stuff it's hard to stop and under the vehicle & out of site your less likley to see it & repair it.I think you would be better off with regular enamel "chassi black" with extra hardner,Good luck have fun!

[mike12]

I USE PRO PAINT YOU CAN HIT IT WITH A HAMMER AND NOT HURT IT WORKS GOOD ON FRAMES:fsj:

[kram]

Can't go wrong with POR-15 or KBS Coating "Rust Seal" Both are Moisture Cure Urethanes that you can roll, brush or spray on, directly over rust, and cures to a powder coat like surface.

I stripped my whole Body down to steel and rolled on two coats of the KBS a few months back to "cure" the epic surface rust and spider veining I had.

seems like a solid product and has held up great for me so far.

[2003 mcs]

I would not use bedliner, powdrcoat or POR15 (in another thread) on the frame. I read this from someone that races off road. This racer had the roll cage powdercoated. He had a rollover or something, visually inspected roll cage and everything checked out-again visually. Turns out he had cracks in the cage that he did not see because the powdercoat is so thick. He found out he had cracks during a race when the rollcage started falling down on him (he was ok).......I am at this point too, I will be painting my frame and axles with this http://www.masterseriesct.com/. No I have never used it before, but I have used POR15 (and will never use again). I will use bedliner for wheelwells and floor boards (I'm hoping for some sound deadening qualities too).

[kram]

I looked at this stuff before I used the KBS. I think fundementally its the same thing, Moisture Cure Urethane. I'm no body shop expert, and no chemist though.

To each their own I suppose. Out of curiosity, why such a negative view on the PRO-15?

[2003 mcs]

http://www.ifsja.org/forums/vb/showthread.php?t=109073&highlight=POR15

I followed the directions and did the correct prep methods, apply methods, etc everything. I did a trailer, not only did it flake but it faded too (and I used their recommended topcoat to prevent fading). All that time spent prepping with the end result being flaking and fading. It looked good for a couple months. I guess snow and shade is it's kryptonite.

[2003 mcs]

I just used the MasterCraft stuff today (1st coat). Applied by foam brush (suggested when not spraying). So far so good. But I think it is best when used on a part off the vehicle, I don't like crawling under a vehicle anymore. I did use CP90 on my brothers pickup frame. Messy, but quicker, able to get into areas you can't reach by painting. Unless you are going for show quality undercarriage this is the way to go (for me at least on my Jeep). So I will finish area that I painted with MasterCraft (apply another 2 coats) but the rest I will spray with CP90.

http://www.orisonmarketing.com/corrosion/cp90/cp90.html