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Old 10-03-2013, 10:41 AM   #1
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POR-15 Undercarriage Rust-Proofing

I was wondering if anyone in the forum has ever used POR-15? What is your experience with the product? Would you suggest using it? And, what other precautions did you take prior to (winter) aka.salt/corrosion protection.

How does it look after (x) amount of time?

Do you have any photos to share?

How did you apply it? and how many coats did you use?

Cheers!

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Old 10-03-2013, 12:28 PM   #2
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I've never used it, but this was a hot product when I was on the L.O.S.T. Liberty forum. One of the members used it to coat his M416 Trailer. From what I understand, this is some rally Bad-A$$ stuff! There is also a UV inhibitor additive if you plan on using it in an area exposed to sunlight.

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Old 10-03-2013, 01:10 PM   #3
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Originally Posted by ConradCalvin View Post
I was wondering if anyone in the forum has ever used POR-15? What is your experience with the product? Would you suggest using it? And, what other precautions did you take prior to (winter) aka.salt/corrosion protection.

How does it look after (x) amount of time?

Do you have any photos to share?

How did you apply it? and how many coats did you use?

Cheers!
I use it all the time and love it...I did the entire underside and frame of my TJ a year ago and it still looks like I just did it. I also did my entire tub before I Raptor lined it. It goes on over light rust and will turn it solid.

It will fade after a while in the sun but holds up well.

I may be able to snap a few

One or two depending where I am trying to cover. It's not thick and goes on like water. Also do not get it on your skin as it's a pain to get off. The old stuff would not come off and you had to wait for your skin to shed but the new stuff will come off with work.
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Old 10-03-2013, 01:11 PM   #4
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I've never used it, but this was a hot product when I was on the L.O.S.T. Liberty forum. One of the members used it to coat his M416 Trailer. From what I understand, this is some rally Bad-A$$ stuff! There is also a UV inhibitor additive if you plan on using it in an area exposed to sunlight.
Thanks for the post. I think I would probably use the clear coat sealant/UV protector anyway, even though I'm doing the undercarriage. I have also heard good things, however I haven't seen any pics on wranglers or came across it in the forum yet.
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Old 10-03-2013, 01:14 PM   #5
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I use it all the time and love it...I did the entire underside and frame of my TJ a year ago and it still looks like I just did it. I also did my entire tub before I Raptor lined it. It goes on over light rust and will turn it solid.

It will fade after a while in the sun but holds up well.

I may be able to snap a few

One or two depending where I am trying to cover. It's not thick and goes on like water. Also do not get it on your skin as it's a pain to get off. The old stuff would not come off and you had to wait for your skin to shed but the new stuff will come off with work.
I'll take note to cover up! Do you just use a regular paint brush?

Did you sand anything prior to putting on the etch/cleaner for steel?

So, two thin coats is enough? and what was the drying time between coats?

Thanks for your help!
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Old 10-03-2013, 01:35 PM   #6
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I'll take note to cover up! Do you just use a regular paint brush?

Did you sand anything prior to putting on the etch/cleaner for steel?

So, two thin coats is enough? and what was the drying time between coats?

Thanks for your help!
I just ran over parts quickly with a scotch brite pad but I have also done it without any prep on my trailer and that has held up well also.

Yup cheapo paint brush from home depot and throw it out after you are done with it.

Most of the underside of my jeep is one but I did two on the frame. Also I used a gloss black, I know they have a couple of colors like grey.
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Old 10-03-2013, 02:08 PM   #7
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I just ran over parts quickly with a scotch brite pad but I have also done it without any prep on my trailer and that has held up well also.

Yup cheapo paint brush from home depot and throw it out after you are done with it.

Most of the underside of my jeep is one but I did two on the frame. Also I used a gloss black, I know they have a couple of colors like grey.
I'm assuming you did not add a primer...you just used the metal prep-etching solution...? Also, did you seal it with the chassis?

Lastly, would you still use an oil based protectant over top of the paint...the typical undercoating used on vehicles prior to winter.

Thank You
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Old 10-03-2013, 02:17 PM   #8
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por-15 is great. just coated my TJ rails with it in July. Keep in mind that if you get it on anything, it's on it. I have a nice black splotched garage floor now (stuff on my arms took just about 2 weeks to come off). It dries rock hard, then I took a couple rattle cans of chassis coat black to coat over it. I don't see how typical use would scratch through to metal now.

I used the cheapo foam paint brushes. Worked great, but you'll go through about 4 of them (maybe more) to do a frame as they do start falling apart after a while.
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Old 10-03-2013, 02:26 PM   #9
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From what I understand, you have to re-coat somewhat frequently...
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Old 10-03-2013, 04:35 PM   #10
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From what I understand, you have to re-coat somewhat frequently...
You sure you heard that about POR? I can tell you that I didn't do hardly any prep (no primer or sealer) and after a year in NH including our winter with salt covered roads it doesn't look any different.

I literally just painted it on my landscape trailer right over the rust with zero prep and it still looks perfect (a little faded) almost 2 years later.

I don't know of any other pant/protectant that is as durable as ths stuff.
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Old 10-03-2013, 04:44 PM   #11
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Where is the POR-15 product available from and the cost ?
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Old 10-03-2013, 04:46 PM   #12
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Where is the POR-15 product available from and the cost ?
Stop Rust with POR-15® - We Know What Permanent Means!
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Old 10-03-2013, 05:08 PM   #13
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I don't think you ever need to reapply.

What I'm wondering is do you really need those two other prep products they try to sell you? That marine clean spray and the other thing? Cause the whole sales pitch is you can apply POR directly to rusty surfaces but when you go to buy it they tell you you have to use they're two prepping solutions.

It's not even that i mind paying for it. But i work full time and treasure my weekends and don't feel like spending three days just to coast the underside of my Jeep.

Any thoughts? Can i do without?
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Old 10-03-2013, 07:41 PM   #14
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I don't think you ever need to reapply.

What I'm wondering is do you really need those two other prep products they try to sell you? That marine clean spray and the other thing? Cause the whole sales pitch is you can apply POR directly to rusty surfaces but when you go to buy it they tell you you have to use they're two prepping solutions.

It's not even that i mind paying for it. But i work full time and treasure my weekends and don't feel like spending three days just to coast the underside of my Jeep.

Any thoughts? Can i do without?
I'm telling you skip the other stuff and slap it on you will be good to go.
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Old 10-03-2013, 09:02 PM   #15
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So does any one use an oil based protectant for winter over top of the paint? You know that tarish/oily stuff that some people put into their doors and undercarriage..?

I think I'm still going to buy the etch/adhesion....there is no harm..and a drying time of 30mins. Will give me a peace of mind.
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Old 10-03-2013, 09:03 PM   #16
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Has anyone purchased this stuff in the Toronto Area? Not sure who sells this stuff....
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Old 10-03-2013, 09:14 PM   #17
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I'm telling you skip the other stuff and slap it on you will be good to go.
Sorry, i think i had misread you're posts. Glad to hear it works as it should.

I'm still aiming to do my undercarriage before winter. i know i need special stuff for the exhaust. What I'm wondering (from anyone whose done this before) is can you actually do it all without taking the body off the frame, removing skid plates, etc... Also, how do you deal with moving parts like axles, u-joints, shocks, etc.. Can you do them too?
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Old 10-03-2013, 09:15 PM   #18
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Has anyone purchased this stuff in the Toronto Area? Not sure who sells this stuff....
Know a guy in Montreal if that helps. It's hella expensive stuff tho...
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Old 10-03-2013, 09:19 PM   #19
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Sorry, i think i had misread you're posts. Glad to hear it works as it should.

I'm still aiming to do my undercarriage before winter. i know i need special stuff for the exhaust. What I'm wondering (from anyone whose done this before) is can you actually do it all without taking the body off the frame, removing skid plates, etc... Also, how do you deal with moving parts like axles, u-joints, shocks, etc.. Can you do them too?
i would say stay away from moving parts...especially was that require balancing. Nevertheless, I haven't done it yet so I'm not sure. For example, the crank shaft would be a bad idea. For the exhaust you could use their product Black Velvet High Heat Protective Paint.
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Old 10-03-2013, 09:40 PM   #20
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I have done a few frame off restorations and used POR15 on the underbody and frame every time and it looks like factory finish. Like others have mentioned it will stick to everything so cover up well.

I purchased a can last year from Amazon but in the past I ordered directly from Eastwood.
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Old 10-03-2013, 11:33 PM   #21
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Any spots we shouldnt paint? as asked above...

Thank You
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Old 10-04-2013, 07:31 AM   #22
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The axles, springs and even the u-joints and drive lines will be fine but I wouldn't do more than one coat on the spinning parts. I haven't used their clear coat or their etching primer so I can't comment on those. For undercarriage parts that only have surface rust I just degrease and clean everything good and then apply the POR.
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Old 10-04-2013, 10:35 AM   #23
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would anyone suggest painting this stuff over something that has been painted from factory. For Example, I noticed some of the frame has been painted green underneath...should I paint this as well with POR15? Would it be a bad idea?

THanks!
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Old 10-04-2013, 12:56 PM   #24
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POR 15 is a great product. I've used it many times, but it is a 2 step process. As an alternative, try "Miracle Paint" from Hirschauto.com. This is just one step.
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Old 10-04-2013, 01:44 PM   #25
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would anyone suggest painting this stuff over something that has been painted from factory. For Example, I noticed some of the frame has been painted green underneath...should I paint this as well with POR15? Would it be a bad idea?

THanks!
I've watched a lot of videos on applying por-15. From what I've seen, there's nothing harmful about applying it over paint -it'll just be an extra later of protection but the problem is that it doesn't bond very well to paint. That might explain why they encourage you to use their solvent first.

I'm not a fan of removing factory finish that is still intact so i plan on lightly sanding it instead for a better adhesion. i hear that helps.
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Old 10-04-2013, 04:03 PM   #26
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Has anyone purchased this stuff in the Toronto Area? Not sure who sells this stuff....
saw some on ebay that will ship north
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Old 12-01-2013, 11:32 AM   #27
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how much is needed to do the frame, axles, ect.? 1 quart, 2 quarts, a gallon?
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Old 12-01-2013, 11:45 AM   #28
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One 4oz can did one coat on my F150's super crew frame. This stuff is great, spreads far an is self leveling. Just dont get it on you or something you dont want it on lol
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Old 12-01-2013, 11:48 AM   #29
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I found it better to buy smaller cans, with the bigger cans you should use it all at once or quickly thereafter. Ive got one 4oz can I cant get the lid off now haha
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Old 12-01-2013, 02:33 PM   #30
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As with most anything prep work is important for longevity. There is a por-15 spray that will oxidize the metal to assist adhesion. It is actually beneficial to have fine surface rust on the project. And as stated above, buy smaller cans unless u plan to use all of it. If u will not use all of it then carefully pour what will be used into a separate container so u don't dip your brush in what u plan to save. Wipe the lip well and/or place Saran Wrap over it or u may not open the lid again. Store what's left in a fridge. Once the cans opened its life is limited. One quart will go a long way. I used aprox. 1.5 quarts for 2 coats on a 4x6 trailer...inside/outside/bottom. If u can't find any place that sells it check with an auto body supply shop. They will likely know. Hope that helps. Cheers.



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