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Old 03-20-2010, 03:10 PM   #57
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The issue does not seem to be finding a workable primer. There are a number of folks who seem to have used a range of products with some success, i.e., XIM, Kilz, etc. The issue is plasticizer migrating through the primer and paint to make the walls sticky. If you use the exoxy primer, let us know if you have any subsequent issues with "sticky walls."
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Old 03-22-2010, 12:54 PM   #58
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Just to update, my walls are still in good shape. I'm really surprised this worked. If I ever have to do this again, I'll probably try the oil based paint route.

Jim
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I have painted over vinyl wallpaper many times, always using an oil base primer, it works! As stated from Jim & Susan above "If I ever do this again, I'll probably try the oil based paint route". You can put any paint over an oil base primer, as for me I would ONLY use an oil based enamel in my trailer, period, that's just me!

Looks better! Feels better! Last longer!

.
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Old 04-29-2010, 09:52 AM   #59
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Ever get that response from Dwight?

Hi Jim,

Did Dwight ever give you a brand name in response to your post on 8/25/2009?

Dwight's quote:
"I am a retired plastics engineer and have formulated many flexible PVC compounds. This sticky problem is common to many non-rigid PVC compounds. It is caused by the liquid plastiziers, that are used to make the PVC flexible, becoming incompatible with the rest of the PVC compound and being kicked out of solution or what we call "spewing". The degraded liquid plasticizers bleed to the surface of the PVC and then migrate into or combine with the top coat you have put on to cover up the problem. To be successful in the long run, you need to pick a top coat that is completely impermeable to the plasticizers. Otherwise, you will just cover up the problem till the plasticizers destroys the topcoat polymer. The underlying problem is the stabilizers in the plasticizers break down over time and the plasticizers degrade. You can not do much about that."

Your quote:
"Dwight, can you recommend something? Name brand, I mean.
Jim "

I'm trying to figure out the "correct" primer for my interior walls on my 1974 Trade Wind. I'm also trying to figure out whether or not to apply latex paint over the "correct" primer for my "spewing" flexible pvc interior walls.

Boy, I'd sure appreciate any enlightenment you might have on this sticky matter! Feel free to email me at: tojunk@att.net if you like (or anyone else reading this post). Thanks.

Daniel
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Old 04-29-2010, 02:35 PM   #60
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http://www.airforums.com/forums/f39/...ors-62392.html

This is what I have learned. I did the following: Pre-primed with XIM plastic primer, primed with Xinsser oil-based primer and painted with latex. I'll put a coat of Polycrilic on next.
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Old 04-29-2010, 05:23 PM   #61
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Hi Jim,

Did Dwight ever give you a brand name in response to your post on 8/25/2009?......

I'm trying to figure out the "correct" primer for my interior walls on my 1974 Trade Wind. I'm also trying to figure out whether or not to apply latex paint over the "correct" primer for my "spewing" flexible pvc interior walls.

Boy, I'd sure appreciate any enlightenment you might have on this sticky matter! Feel free to email me at: tojunk@att.net if you like (or anyone else reading this post). Thanks.

Daniel
No, Dwight never did answer that question.

Take a look thru my http://www.airforums.com/forums/f226...nte-15132.html thread and you can see how I did it. Use the search feature in the thread so you don't have to wade thru it all.

There are several members here ( I found after painting with the SW products) that used oil based primers and paints with good results. You might send them a PM after you locate their posts and ask specifics. From what I've read, Oil based coatings looks like a much better idea, from a longevity standpoint.

Jim
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Old 11-02-2010, 08:32 PM   #62
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So does this mean if we keep the Albatross in the frozen northland, our paint job will be safe?
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Old 11-03-2010, 02:29 AM   #63
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So does this mean if we keep the Albatross in the frozen northland, our paint job will be safe?
I don't recall seeing anything mentioning the *sticky wall* issue is a factor on the local of the trailer ... but certainly post your results - whatever they may be! My walls are still sticky in areas not covered with polycrylic. But those that were are tack-free! Yay.

Laura
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Old 11-03-2010, 05:34 AM   #64
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My long term testing of flexible PVC formulations, similar to the formulations used for the laminate covering on the inside of 1970 and 1980's Airstream Trailers. was done for medical grade PVC formulations and not targeted to trailers. In my testing spewing was a function of long term heat ageing. Long term storage at higher temperatures cause greater degradation and spewing. My testing was conducted to help me formulate improved PVC formulations to minimize the spewing. I did no testing of coating systems to cover up the problem. AT Johnson/Evinrude Outboard motor Co, I did testing for paint durability, but did not have any applications where we had to contend with spewing PVC formulations.
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Old 11-03-2010, 02:21 PM   #65
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Like Laura, I've had good results with the poly top coat. It's been over a year now and still no sticky coming back thru the top-coat poly. The entire interior was top-coated over a year ago.

Again, tho, it was a difficult process. If I had to do it over again, I'd go with oil based paints. YMMV.

Jim
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Old 11-04-2010, 07:57 AM   #66
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My long term testing of flexible PVC formulations, similar to the formulations used for the laminate covering on the inside of 1970 and 1980's Airstream Trailers. was done for medical grade PVC formulations and not targeted to trailers. In my testing spewing was a function of long term heat ageing. Long term storage at higher temperatures cause greater degradation and spewing. My testing was conducted to help me formulate improved PVC formulations to minimize the spewing. I did no testing of coating systems to cover up the problem. AT Johnson/Evinrude Outboard motor Co, I did testing for paint durability, but did not have any applications where we had to contend with spewing PVC formulations.
My tackiness appeared within a few months - after one of our coldest winters.

But, if the tackiness (spewing?) is greatly affected by heat and time, I am skrewed! Well, unless I get that job in Wyoming, and quickly!
Laura
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