Por15 issue

bishop1911 · Aug 11, 2007

I was working on my car today with some other guys, when one of them said they had used por15 on the underside of their car. He said that he drives it in the winters in the northeast here, and that after 8 months it all blew off. I had my car sandblaster to metal, then we had it prepped with cleaner and stuff and then por-15 put on all underneath, engine compartment and interior. This kinda concerns me. Has anyone else had this experience or was this a rare case or maybe improper application? I know a lot of guys are using this stuff, and it cam highly recomended, so what's the deal? Maybe once I am driving it I will need to just keep an eye on it and make sure it doesn;t come off. It dries hard as a rock, so I think it would be hard to have that happen to, but I wanted to see if others had had that problem. Thanks.

suki243 · Aug 11, 2007

I've used it, and I loved it, it is practically impossible to get off, it doesn't crack or chip. I'm not sure what happened in this other person's case. I tried to scratch it and it only scratched a little. Then again i've only used on my interior floorpan.

BullittStangV8 · Aug 11, 2007

Its helpd up fine in my engine bay. No flaking. I've banged it/hit it with things, and all it seems to do is scuff at the worst.

Platonic Solid · Aug 11, 2007

bishop1911 said:
... I had my car sandblaster to metal, then we had it prepped with cleaner and stuff and then por-15 put on all underneath, engine compartment and interior. ...

If by "cleaner and stuff" you mean it was etched, then I wouldn't expect any issues. The underside is a very difficult area to prep. I wonder how thorough your friend was. I know there's a limit to how much time and effort I'd be willing to put into a vehicle that's driven in the winter.

hungrymonkey · Aug 11, 2007

the por15 in my interior peeled up after 2 years. my door seal was leaking and the carpet got wet. It bubble up and got soft like cling film, but did not break.

Luckily there was not any rust underneath.

As for prep, I followed the manufacturers directions to a T. sanded all the old paint off, did the cleaner, metal ready, por-15 etc. it held up through one new mexico winter, and one year of Oregon weather. Then peeled up.

When I contacted POR-15's tech support, They told me that I must not of followed the directions.
I am going to try the corrales next. I really need to get all the POR off. Which is fairly easy. a wire wheel and some paint stripper takes it right off.

hungrymonkey · Aug 11, 2007

forgot to mention that the engine bay, and undercarriage has held up extremely well. But it does not have moisture directly on it secondary to gravity.

Platonic Solid · Aug 12, 2007

hungrymonkey said:
the por15 in my interior peeled up after 2 years. my door seal was leaking and the carpet got wet. It bubble up and got soft like cling film, but did not break.

Luckily there was not any rust underneath.

As for prep, I followed the manufacturers directions to a T. sanded all the old paint off, did the cleaner, metal ready, por-15 etc. it held up through one new mexico winter, and one year of Oregon weather. Then peeled up.

When I contacted POR-15's tech support, They told me that I must not of followed the directions.
I am going to try the corrales next. I really need to get all the POR off. Which is fairly easy. a wire wheel and some paint stripper takes it right off.

... the engine bay, and undercarriage has held up extremely well. But it does not have moisture directly on it secondary to gravity.

I'm tempted to conduct a submergence test on one of my Por15 finished bumper brackets. They're cleaned with Por15's Marine Clean, etched with Por15's Metal Ready, finished with 2 Coats of Por15 black, then 2 Coats of Por15 Top Coat.

My car won't be ready to reassemble for the next 2 years anyway.

bishop1911 · Aug 12, 2007

por

I guess it was an application issue, but it still concerns me. At this point all I can do is keep an eye on it and if the underneath starts to peel, then I can just get under there and either sand or wirebrush it off and repaint. Although it would be a pin with everything bolted into the car, it can be done and the wheel wells can easily be accessed as well. The interior actually still had the original red primer on it, so he didn't blast it all off, just kinda "frosted" it. The engine compartment was done with por, then etched and then the engine black over that. I would think it should be ok, but I guess we will see. I will just keep a close eye on it, and the car will never be driven in the winter and will be in a dry garage. Hopefully there won't be any big issues. Maybe putting on some sort of protector coat almost like a bedliner over the underside would help. But I think I will just wait and see.

35167stang · Aug 12, 2007

I have the wholes underside of my 67 mustang done with POR-15, I lived in Wyoming until I just recently moved, snow, rain, frozen, it was the first thing I did before anything else and that was 5 years ago. Have not had any problems and I swear by that stuff. Hope this helps

hungrymonkey · Aug 16, 2007

Platonic Solid said:
I'm tempted to conduct a submergence test on one of my Por15 finished bumper brackets. They're cleaned with Por15's Marine Clean, etched with Por15's Metal Ready, finished with 2 Coats of Por15 black, then 2 Coats of Por15 Top Coat.

My car won't be ready to reassemble for the next 2 years anyway.

hot and humid seems to be what did it in. I think there would not be enough oxygen to promote oxidation if it was submerged.

what is bad, is the bumper to my 86 f150. I sprayed some metal ready on it and painted on the POR. other than fading it has held up extremely well.

RMODEL65 · Aug 19, 2007

i bet he painted over the old paint on the bottom of the car

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