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por-15 is a (special) paint, not rust proofing Posted by Snowmobile [Email]  (#686)  [Profile/Gallery]
(more from Snowmobile) on Thu, 8 Jun 2017 04:18:39
In Reply to: I've been thinking about pressure washing then POR-15, Notnoel  [Profile/Gallery]
, Wed, 7 Jun 2017 08:16:53
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por-15 is excellent when you are repairing rusted metal. You get everything cleaned properly with their prep solutions and then paint bare rusted metal and it is very tenacious and holds up well when carefully applied. However, the prep is fussy, and needs to completely dry before application of the paint ("bone dry" they say on the can). It can also be used with fiberglass mesh - eg on my 9-5 dogleg which had a tiny hole, I prepped, painted with por-15, and immediately applied fiberglass soaked in por15 over the area. After that I applied the smooth bondo paste just to create a smooth surface, sanded, primed, painted. This has held up for many years with no indication of rust coming back (at the time, there was a tiny bubble on the edge of the dog leg, and investigating I found the damage under the fender liner was worse - rust you see is usually the tip of the iceberg!)
Ziebart is a different type of product. It is not a primer for paint but rather a rust proofing system. I have not used it. I have heard good things about it in the past (not only from Neil Dale), but it seems less popular than other options around here these days. Oil sprays of various sorts are much more popular around here. I don't know a single person up here who currently uses Ziebart to be honest. I get the feeling it has been around for a long time and was a big thing back in the day, but over the last 20 years other products have been sufficiently competitive that it is chosen less now, at least around here in Canada. We have many more rust proofing choices than in the USA because we have so much more snow/salt/slush than most of the USA (though you New Englanders are mostly in the same boat).
Numerous Saab mechanics I've spoken with up here have recommended Rust Check or Krown (over other products), both of which have creeping oil based sprays that you can apply in various places. It comes down to the quality of the application, but in our cars they initially drill a number of holes (they insert plugs after) so they can thoroughly spray every cavity of the car. They guarantee the car will be rust free if it is sprayed annually from brand new and if stone chips etc are touched up immediately etc (Ziebart has a similar guarantee). I buy used cars, so I get them sprayed, but at 5 years old unsprayed there could be small issues that have started already (that you don't necessarily see like that 9-5 dogleg). The Rust Check seems to keep problems at bay very well and prevents new issues. Our cars see a lot of salty slushy mess in the winter and I have 3 saabs, the newest being 13 years old (the others are 28 and 24). I regularly see untreated Mazdas, Huyndais, Kias etc less than 3 years old that are visibly rusty (sometimes less than 1 year old!) due to our climate.
The oil based sprays can be applied so the end result is not too messy externally, but it is grubby to work on the car. If Ziebart is cleaner, that may be a significant upside to many owners. The oil based sprays also tend to soften rubber parts that see a lot of spray - something I don't like. Eg the rubber on side marker lights can go funny... the lights are cheap to replace, but it might make sense to pull them for a day or so after spraying or at least wipe the stuff off the rubber in that time period, because otherwise, the rubber literally melts away over 5-10 years...
No rust-proofing product works where you don't apply it, so eg if you don't rip out the interior prior to application, you can't expect rust to not start on the interior of floors etc (common issue in a cold climate as many cars have double vapour barrier layers and condensation or spills can enable trapped moisture (which = rust)... btdt!
personally I just wish they would stop putting salt on the roads!!!
, Tue, 6 Jun 2017 13:09:07, Thu, 8 Jun 2017 13:39:35, Sat, 10 Jun 2017 04:10:51, Sat, 10 Jun 2017 13:23:01, Sat, 10 Jun 2017 14:19:47, Sat, 10 Jun 2017 16:44:53, Sun, 11 Jun 2017 11:34:26, Fri, 9 Jun 2017 13:02:59, Sat, 10 Jun 2017 04:56:09, Sat, 10 Jun 2017 06:07:52
1, Sat, 10 Jun 2017 11:10:50, Sat, 10 Jun 2017 05:01:28, Thu, 8 Jun 2017 13:23:15, Tue, 6 Jun 2017 20:44:301, Wed, 7 Jun 2017 08:16:53, Thu, 8 Jun 2017 04:18:39 <-- Viewing This Message, Wed, 7 Jun 2017 14:32:44
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