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.
Por15 issue
- Thread starter bishop1911
- Start date
BullittStangV8
Founding Member
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
Founding Member
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.
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.
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.
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
Founding Member
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.
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.
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.
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
Member
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