I was introduced to POR15 about 7 years ago. I used this product to coat the inside of 31 Model A that was showing quite a bit of internal surface rust. Since that time I haven't had the oportunity to reinspect the vehicle to check how things are holding up but assume everything is ok. One of my current projects is a early 70's Mopar, the fenders show surface rust on the underside mostly because these vehicles did not have a wheelhouse over the front tires. My customer requested the use of POR15 on the fender undersides. My question is since I haven't done any product testing, what is the lifespan of this product? How does it hold up when the surface is chipped exposing the metal to oxygen? Will the rust creep underneath? Does it crack with age? Has anyone here monitored this stuff for over 10years? 15years? 20years? If I remove all the corrosion and prime as I usually do with a heavy application of chip guard and undercoat I know the fenders will hold up but my labor will probably exceed the cost of replacement fenders. POR honestly sounds too good to be true so I'd like some feedback from people who have had long term experience with the stuff. Anybody? :(

3,426 years :eek: :eek: :eek:


Sorry 'bout that Bob, I just started using it myself, but great question graemlins/thumbsup.gif

My oldest project with POR15 is over 7 years old now. It still looks like the day after I applied it...

7 years, good to hear, was it an underbody application? TTT

baddbob71,

I'm gald you've posted this question. My concernes about the chip or scratch are the same as yours. The POR-15 website claims that if the product is scratched to bare metal, it will only rust at the scratch. I don't see how that would be possible myself (just my opinion, I have no real metal experience to base it on). Common sense tells me that if it was scratched, the corrosion would continue within the metal, underneath the coating. After some time, you would think you would be left with a hollow panel coated on both sides. I don't know, just my thoughts.

The stuff seems really durable but I can't see it as a cure all for stopping corrosion. It sure would be nice to think it would be as good or better than full corrosion removal and application of traditional refinish methods of interior or underbody surfaces. Lets get more input. smile.gif ttt

Originally posted by baddbob71:
POR honestly sounds too good to be true so I'd like some feedback from people who have had long term experience with the stuff. Anybody? :( Anything that sounds too good to be true usually is.

It doesn't even come close to living up to the claims. It does not only rust where the metal is exposed or the paint gets chipped. The metal will still rust underneath it. It will hold back rust for a while and it works well on vehicles that don't see much rain and are kept dry most of the time though. I tried it on a few rust spots on a daily driver truck and it didn't last the winter before it was peeling off with worse rust underneath than I started with. Tried it twice in case I did something wrong the first time. That wasn't what the POR advertising says will happen.

Peter

Anything that sounds too good to be true usually is.

It doesn't even come close to living up to the claims. It does not only rust where the metal is exposed or the paint gets chipped. The metal will still rust underneath it. It will hold back rust for a while and it works well on vehicles that don't see much rain and are kept dry most of the time though. I tried it on a few rust spots on a daily driver truck and it didn't last the winter before it was peeling off with worse rust underneath than I started with. Tried it twice in case I did something wrong the first time. That wasn't what the POR advertising says will happen.

Peter Interesting, Ontario Canada on a daily driver. must be some tough weather conditions, probably similar to here in Michigan's Upper Peninsula? Maybe I'll do some research/product testing on my plow truck smile.gif

Hello, just my opinion but I've used it for several years with only one problem. The first time I used it I didn't follow the directions. I didn't use Metal Ready. The surface has to be dry. They tell you to use a hairdryer if necessary. You must use Metal ready for this to work right. Also you should never paint from the can. Pour some in a clean container that your not going to use and immediately close the lid per instructions. If just so much as a bead of sweat drops in the can it will ruin the paint and it won't stick properly. I didn't really believe this but it happened to me. I have used it several times over the past 9 years and after taking some extra time and being patient and applying it right, I have had nothing but excellent results. Still look great. Hope this helps.

Any more long term users? ttt

I figured with the amount that this product was mentioned on this site, more people would have some opinions for at least 2-3 years of use. It better work smile.gif , they make some bold claims on the POR-15 web page, and I have used it per the instructions on some areas that I really don't want to re-visit again on the car.

The Chevelle is not out in any inclement weather! I did the frame, wheel wells, inner fenders, sway bar, rad support, etc. You get the picture. What's amazing is the sway bar. All that twisting and it's still intact.

However, I have a POR job on an old '88 Chevy 2500 that has seen both Wisconsin and Massachusetts winters- about a half dozen now. The cab corners are notorious for rotting out. I tore off the big chunks with my hands, painted the inside and out with POR (no other prep) and riveted on some patch panels. Looks like the day I did it.

I have a number of other project cars that I have used it on. I used some other product on a '69 Vette frame and had to strip off what didn't fall off a couple of years later. I redid that with POR quite a few years ago too.

I'm no salesman for POR, that's just been my experience. I couldn't be happier with it.

good to hear, anybody else, ttt