That's the thing. Ziebart offers an oil coating and a wax-like coating, yet they still sell the roofing tar crap with free yearly touch ups provided you don't go beyond the 12 months per visit. The visits are all about trying to up sell you any/all of their other products and services and when you don't go for it like my FIL never does, you could imagine the "touch up" they do for nothing.Yikes! The old Ziebart stuff that was more like a wax coating was OK, but the new stuff is horrible.
I appraise cars everyday in my job.Every vehicle that I have owned since the early 70’s, that had the tar-like undercoating on it(e.g. Rusty Jones, Ziebart or dealer applied product), rusted away as if it wasn’t even there. Even warranty applications from the company didn’t seem to prevent the vehicle from falling apart.
I’ve owned newer vehicles with todays better protected metals, that had no undercoating of any type and they’ve lasted as long or similarly. I have been DIYing Fluid Film on the Altima in my signature so we will see how this lasts if I don’t get rid of the car first.