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Old 11-15-2015, 09:16 AM   #1
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Default Adhesion test

I found a sample this morning that I had done last year. The finish is FPOE brilliant oil. It seemed like a great opportunity to do a test with some primers (and breakthrough) I had on hand.


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The test is adhesion to this gloss finish, unsanded. All I did was tack clothed it. I'll do scratch tests at 24, 48 and 72 hrs. Then again at 1 week and 1 month. Once the scratch test is done I'll check adhesion will a 5-1 and scraper.


Last edited by PRC; 11-15-2015 at 09:25 AM..
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Old 11-15-2015, 10:31 AM   #2
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One more comparison was needed, sanded vs. unsanded.


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Old 11-15-2015, 10:38 AM   #3
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I love it. Subscribed. Looking forward to your updates.

Peel Bond seems to be an outlier, a different type of animal in the flock.

So even though I typically apply it to old weathered surfaces, it will nevertheless be informative to know how it bonds to new glossy surfaces.
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Old 11-15-2015, 03:01 PM   #4
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awesome! great experiment!
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Old 11-15-2015, 03:24 PM   #5
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Were any of the primers tinted?

Just curious. The 123 looks pale beige in the pics.
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Old 11-15-2015, 04:27 PM   #6
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Quote:
Originally Posted by I paint paint View Post
Were any of the primers tinted?

Just curious. The 123 looks pale beige in the pics.
The 123 is tinted to navajo white
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Old 11-15-2015, 04:42 PM   #7
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OK you got me ....

I'll be watching for the update
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Old 11-15-2015, 09:02 PM   #8
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The XIM coverage appears to be pretty crappy
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Old 11-15-2015, 09:11 PM   #9
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Peel Bond doesn't HIDE well because it is basically a clear.

EDIT:

Peel Bond doesn't COVER well compared to the others because it is much thicker.

Last edited by I paint paint; 11-15-2015 at 10:22 PM..
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Old 11-15-2015, 11:09 PM   #10
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Why peelbond? Seems like uma would have been a better choice for an adhesion test. peelbond is for filling uneven surfaces.
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Old 11-16-2015, 12:24 AM   #11
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Isn't it considered best practice to sand glossy surfaces BEFORE painting?
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Old 11-16-2015, 01:30 AM   #12
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Quote:
Originally Posted by driftweed View Post
Isn't it considered best practice to sand glossy surfaces BEFORE painting?
In case you missed it somewhere on the top of the page it says sanded vs un sanded. Someone's always gotta have some smart a$$ comment.
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Old 11-16-2015, 01:44 AM   #13
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Great test PRC. Thanks for sharing. Looking forward to the results.
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Old 11-16-2015, 06:10 AM   #14
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Quote:
Originally Posted by MikeCalifornia View Post
Why peelbond? Seems like uma would have been a better choice for an adhesion test. peelbond is for filling uneven surfaces.
As I said, these were the primers I had on hand. I had several oil primers but wanted to stick with acrylics.

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Old 11-16-2015, 06:38 AM   #15
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Quote:
Originally Posted by driftweed View Post
Isn't it considered best practice to sand glossy surfaces BEFORE painting?
Absolutely. I wouldn't recommend this be done on any job. Always sand gloss.
This is a test to see if any of these are up to the task. With the improvements in acrylic resin and the differences in resin quality used I want to know if any could stick to this.
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Old 11-16-2015, 07:13 AM   #16
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22 hrs.-
In order of best to worst-

Breakthrough - wouldn't scratch

046- not easily scratched only a couple small spots

123- moderate resistance

Sure seal

Peelbond

Advance- easily scratched



All samples were first scratched lightly with increasing pressure till a scratch was produced. I dug at breakthrough and 046 with everything I had. 123, peelbond and sure seal were all in the moderate pressure range with slightly less force needed in that order. None of the sanded areas scratched.

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Old 11-16-2015, 11:41 AM   #17
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046 has always kicked ass.
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Old 11-16-2015, 01:16 PM   #18
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I can't believe breakthrough stuck like that to hollandlac. We started using Porter advantage 9000 a few weeks back. Sales guy says it will stick to oil as well.
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Primer makes everything better...
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Old 11-17-2015, 07:19 AM   #19
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2 days

046
Breakthrough
123/Peelbond
Sure seal
Advance

Today I was able to produce a couple small scratches in Breakthrough so yesterday must of been a fluke. 046 still scratched but was more resistant to scratching than breakthrough (smaller chips). Peelbond tied with 123 for amount of force required, but with 123 the scratch wouldn't continue to "run" as easy as peelbond.
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Old 11-17-2015, 02:56 PM   #20
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I do find that BM paints take longer to get full adhesion often. It will be interesting to see how advance does after full cure. We had some peeling of advance over oil on windows that had condensation issues.


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