POR15

[Bill Lawless]

I have a large can of POR15 I have been using for a few years. I drill a small hole in the lid and use a self tapper to seal it when done. I use small plastic pots like those used in restaurants for stuff like dips, perfect size to use on the usual parts that get painted as the POR15 goes a long way. I use acid brushes which are cheap enough to throw away after one use.

Interesting... I bought a large can also..
However, I talked to POR tech.. They said it really needs to be stirred for 4-5 min before using.. And do NOT shake it, will cause air bubbles that will cause it to fail... ???

Bill

[David Jones]

John Lindstrom, please contribute something constructive to the forum. You remind me of a boss I once had who often found fault with my projects but could never come up with any alternative suggestions more specific than "I don't like it"
Sorry, not a flame just an observation.
POR15 has it's limitations. It is UV sensitive I understand so it should not be used where it is exposed to sunlight. I have never tested it on stuff left in the sun so do not know the effect.
Bill I have always shaken it before taking the self tapper out and then pour it into a small pot and have never noticed bubbles in it but then I brush it on and it is so thin it seems to just settle out and dries to a smooth gloss finish.

[Bill Lawless]

John Lindstrom, please contribute something constructive to the forum. You remind me of a boss I once had who often found fault with my projects but could never come up with any alternative suggestions more specific than "I don't like it"
Sorry, not a flame just an observation.
POR15 has it's limitations. It is IR sensitive I understand so it should not be used where it is exposed to sunlight. I have never tested it on stuff left in the sun so do not know the effect.
Bill I have always shaken it before taking the self tapper out and then pour it into a small pot and have never noticed bubbles in it but then I brush it on and it is so thin it seems to just settle out and dries to a smooth gloss finish.

I'm sure it settles.. Just saying what they told me..
now i'm nervous it won't stick well... Way to much work to have it peel off..
Bill
BTW, i'm only doing the underside and undercoating over it...

[David Jones]

Bill, I think the underside is a perfect application as sun don't shine down there and as it dries hard as nails I don't think you need to top coat it but that could be a personal preference.

[Martin Benade]

The sun makes it get dull dark gray, but it still seems like it holds up pretty well, just doesn't look as nice.

[Bill Romano]

If you apply POR15 on a hot/humid day, it'll bubble. Instructions clearly identify potential problem so don't blame POR15 for that "sandy" surface.

If applied on unprepared surface (should be sand blasted or sanded to give POR15 some tooth) it will simply flake off.

If you don't use saran wrap between lid and can after opening, you'll never get the cap off again.

It really flows during and after application. While brush marks disappear, you'll get runs if you don't figure out how to avoid gravity.

[Jim Liberty]

I do it like Mike Wilson. Have for decades. ....................Jim.

[Jack Walter]

I scraped and wire brushed the surface on the inside of my car and then used grey POR15 and top-coated it with black chassis paint. It turned out really nice but if you get POR15 on your skin it will be with you for a week or two.

For the Land Rover I'm restoring I had the frame sandblasted, applied a chemical etch, then POR15 black and black chassis topcoat. I'm a big fan of the stuff but like all materials it has to be applied correctly. I spent 30 years at Lockheed working with applying coatings to aircraft so I know a bit about corrosion and material applications. POR15 is good stuff.

[Martin Benade]

It is important to topcoat POR15 rather soon, I think while it is half-dry or nothing will stick to it.

[David Jones]

Let there be no more questions on POR15. It is good stuff I swear.
https://www.por15.com/POR-15-Technical- ... ep_62.html

[John Lindstrom]

I wouldn’t reccomend it. There are many quality products out there. POR 15 isn’t one of them.

This is the first thing I put over prepared bare metal after etching it mildly with phosphoric acid and rinsing it:

https://protective.sherwin-williams.com ... oduct-6808

I follow it with a couple coats of 2k polyurethane primer sealer.

After that you can leave the car outside for a hundred years without worrying about rust.

[Mike Wilson]

Those are some good tips. Thanks, John.

Mike