I just bought a 2007 Envoy with 35K miles and according to the carfax the dealer gave me, the car has been in the Cleveland Ohio area since it was new.
The underside of the car has more rust on it than I think it should have, at least more than any of the other cars I own, one being a 98 Regal! (I live around Cincinnati.)
Anyway, it's bothersome enough to me to get me thinking about Ziebart or some alternative.

I'm looking for Ziebart or other undercoating experiences.

Thanks for the advice.
Dave

I would not recommend undercoating. This treatment can actually cause more harm than good. Undercoating essentually forms a moisture barrier that holds in condensation during the colder months. The cabin air temperature being warm wants to condensate to the outside cooler temps. the rubber coating holds this process up there fore rotting out the metal faster.
I do like to use LPS-3 on all the underside components such as brake lines and fittings. Aluminum products and in the weep holes of the doors etc. This is more of a wax film the slows and protects the raw products.
Undercoating at this stage will only make the underside look good for a while but will have negative results.

Good advice. You want a product that is more like oil/grease, instead of waxy tar.

There are places that will do an oil underspray, with a special rustproofing oil that has fibers in it, so it is less likely to drip and run. It usually has to be re-applied annually, especially where the roadspray hits.

I appreciate the responses. I was wondering about that, if the Ziebart would just encapsulate the rust and not stop it. I'll look into the oiling treatment.

Thanks,
Dave

How about undercoating in real snow areas, like Nova Scotia, Canada?

What is recommended?

I brought a US Jimmy in this summer and it is almost rust free (compared to local vehicles). Would like to protect it / give it the best life here it can have.

I feel the same way if not more about undercoating as mentioned in my original post. Under coating will actually accelerate the rusting affects especially in that region. It will encapsulate the contamination and deterioration of the metals already in the corrosion state as well as holding the moisture in.
If you have noticed, manufacturers don't offer the undercoating as an option the way they did in the years past.

If you have noticed, manufacturers don't offer the undercoating as an option the way they did in the years past.
Do you mean manufacturers or the car dealers?Because many dealers in my area still offer and recommend undercoating to customers at the time they buy a vehicle.
I also think if there is any reduction in the offerings it may be related to better manufacturing processes used today along with more rust resistant materials. And a better educated buying public who may now realize , thanks to organizations like Consumer Reports, AAA, and the like that this service is not really necessary and to say, "No." and save their money.

I stand corrected "Dealers".

Do to the newer production processes, I have observed over the years that the newer vehicle fair much better against rust without the undercoating protections. I would recommend as stated the application of LPS-3 to certain parts and areas of the vehicle can be beneficial.

I am merely making my opinion based on observation, experience and advice from auto body friends. Perhaps more information may be obtained through the internet to get other unbiased opinions.

On another note: People will continue to sell "whatever" as long as people are willing to buy, good - bad, right or wrong.