Undercoating

[mikes07kj]

Has anybody done or though about undercoating their jeep. Not just for mud or water but for the salt and everyday grit on the roads. I always wash mine real good but was thinking about something extra to protect against rust.

 

[tommudd]

I got the cans of undercoating when I bought mine and did everything I could see and spray into

 

[offrovering]

Had mine professionally done at delivery new from factory. Now I just touch up and hit spots with the cans of 3M.

If you have rust already you need to wire brush and clean it all, then coat it. Its a great thing to do in the summer or early fall, but at this point it may be too late for the year.

 

[ShafferNY]

Years ago vehicles used to come from the factory undercoated. They don't anymore. I don't know why.

On one autobody forum I was surfing I read that manufactures stopped doing it because it was just trapping in moisture and causing premature rust out.

 

[tjkj2002]

My is undercoated,I'm from South Dakota and all new vehicles must be undercoated before leaving the dealership.I actually undercoated my own KJ since I pulled it of the transport and did the dealer prep package before I thought about buying it.Most dealers back home charge about $120 to undercoat,it's not the cheap stuff that you buy in rattle can either and is sprayed on much,much thicker.

On one autobody forum I was surfing I read that manufactures stopped doing it because it was just trapping in moisture and causing premature rust out.

Just a cost issue,undercoating stops corrosion if applied to a rust free surface.

 

[offrovering]

The best thing is to get a full winter service, they undercoat and also apply application inside doors and frame rails.

Again, only really does anything to a rust free surface, so if you have rust you have a lot of work to do first. Of course, if you are in a heavy salt area, something is better than nothing

 

[blue_kjR417]

I bought my jeep oct 08 and I think mine might be undercoated, but a lady had it before me she was a nurse. I seriously doubt she had it done but idk, like the only things that seem to be coated are like the frame and the underbody nothing on parts like the skids ****** tcase or anything like that idk why or how it was done but theres no rust so...

 

[tjkj2002]

I bought my jeep oct 08 and I think mine might be undercoated, but a lady had it before me she was a nurse. I seriously doubt she had it done but idk, like the only things that seem to be coated are like the frame and the underbody nothing on parts like the skids ****** tcase or anything like that idk why or how it was done but theres no rust so...

The skids,axles,trans,and such should not be undercoated,only the underside of the unibody only.

 

[mikes07kj]

Rust is not an issue and I want to keep it that way. Whats a good brand to buy as far as undercoating products. I know the guys up the street at dunlops so I can use a bay and get my car up on a lift, will make it a lot easier to do.


Did I say car I meant jeep.

 

[tjkj2002]

I used QuakerState undercoating,though you need a special applicator gun and buy the stuff in 30 gallon drums only.

Otherwise use 3M's rubberized undercoating,you will need about 10-12 cans at least and will need to touchup often(best out there for private use but not near the quality as industrial stuff).Do not coat the engine,trans,t-case,axles,any suspension parts,bushings,driveshafts,CV shafts,exhaust,and any exposed bolt threads.