So Por-15 can go over rust. - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-08-2005, 03:28 PM
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Old 05-13-2017, 04:19 PM
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Por 15

POR 15 is neither lacquer nor urethane based, it's based on CA (Cyanoacrylate) aka super glue, which is hygroscopic and absorbs moisture in its curing process. It forms a chemical bond with moisture, neutralizing and immobilizing rust, something that neither lacquer or urethane can do.
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Old 05-13-2017, 04:44 PM
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Quote:
Originally Posted by gmf1313 View Post
POR 15 is neither lacquer nor urethane based, it's based on CA (Cyanoacrylate) aka super glue, which is hygroscopic and absorbs moisture in its curing process. It forms a chemical bond with moisture, neutralizing and immobilizing rust, something that neither lacquer or urethane can do.
If I have a area thats been sandblasted, osphoed, washed and clean but still have a couple dots of rust that i cant get out. Will por 15 work here? 98% cleaned etched metal.
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Old 05-15-2017, 11:07 AM
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holy 12 year old thread recovery batman!
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Old 05-15-2017, 12:04 PM
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Brian Martin,Freelance adviser
 
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holy 12 year old thread recovery batman!
And it looks like by an employee of Por-15!

Brian
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Old 05-15-2017, 04:52 PM
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I have used it on many different vehicles with great results. I used it on the replacement hood on Ol' Blue. Ya gotta get the loose stuff off. Por15 will stick to loose scale, but loose scale will come off, and take the coating with it. What it does (near as I can tell) is to seal the rust so that it cannot progress.
It's still there, but cannot go any further. Rust/corrosion, is kinda like fire, it requires certian things to happen. Remove any one of those, and it can't happen. Por 15 removes one or more of the things that cause rust, so it can't progress. You can even use it on new clean metal.
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Old 05-15-2017, 06:27 PM
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Quote:
You can even use it on new clean metal
Not without etching the metal. If applied to a clean mill finish, it will come off in sheets like plastidip. Even sanding is not enough bite. Even a second coat of POR 15 over cured POR 15 will not adhere without sanding thoroughly.
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