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Old 08-22-2015, 04:38 PM   #1
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Hy-Tech coatings, for AS roof?

Here is a possible "Replacement" for Ceramiflex....

Hy-Tech Coatings... A NASA knockoff company... So, this was developed for space gig, now available to mere mortals.... Here is our final exchange:

"I have attached a copy of a quote for you to look over. You will actually need 3 gallons of the Bus-Kote. A gallon only covers 150sqft at best and you have over 200 sqft of roof. You might get away with two but I would hate for you to run short. I also attached one of the pictures with some comments. The seam tape goes over the patch then is covered with another layer of the patching compound. Should you have any questions please do not hesitate to contact me."

Cost. $257 + shipping. For our 34'... Or less than $8 a foot!

Insulating Paint | Insulating Ceramic Paint Additive | Official NASA Spinoff

Any input? Thanks in a acne!
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Old 09-16-2015, 03:52 PM   #2
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bump
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Old 09-16-2015, 04:23 PM   #3
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"+shipping" how much to you? My quote from them for 2 gallons was $35 for shipping.
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Old 09-16-2015, 04:26 PM   #4
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$88.24
shipping to 78664
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Old 09-16-2015, 04:44 PM   #5
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It would be nice to find it locally.
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Old 09-16-2015, 04:50 PM   #6
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I asked, but they appear to be 'single source'... they do offer the 'insulation' as an 'additive'.... which could be stirred into a good aircraft grade lacquer...which is my other 'thought'... but, finding someone to sell the aviation paint is a pain...
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Old 09-16-2015, 04:53 PM   #7
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This was covered in previous thread about roof coatings. I wrote on this thread about bus-kote at that time and also ph. them and received exc. info, and as I stated before when get enough nerve to coat roof will do with bus-kote, also I have several friends that I rec. bus-kote to, but have not seen them this year or if they did it. It is very reasonable in cost compared to other coatings, plus won't streak and easy to apply. Def. replacement for ceramiflex and I believe less costly. It seems very easy to apply, only reason I'm hesitating is my 1976 pur. new by me and still all original.
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Old 09-16-2015, 05:55 PM   #8
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I've been looking at this as well. My roof coating is pretty thin, and likely needs to be replaced. Hoping that adding a new coating will help with the interior temps in the AS during the summer. Unfortunately, this has moved pretty low on my list of stuff to do lately, as I need to get some other stuff working first.

Good news, is that I think this is a weekend job in the right weather conditions. Tape it off, clean with mineral spirts, and then apply with a roller on the roof. Allow to dry, and apply 2nd coat either later that day or the next day. Is this about right? Will you guys replace the sealants around the roof openings at the same time so that you can paint the entire roof surface?
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Old 09-16-2015, 06:00 PM   #9
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I'd hesitate to coat the roof with insulating material, even though it sounds extremely tempting when it's 115 outside. Here's why:

You'd end up with two aluminum areas right next to each other at two different temperatures. Now the coefficient of expansion might not be enough to matter, but I'd have to say it would worry me.
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Old 09-16-2015, 06:16 PM   #10
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Boyd, I don't get your concern. Could you elaborate at a level suitable for a complete idiot.
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Old 09-16-2015, 11:59 PM   #11
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Guys.. I plan to cover only what Airstream originally painted. Guess was not much of a concern.... But willing to listen....
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Old 09-17-2015, 12:37 AM   #12
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He's probably concerned that the difference in temperature caused by the "insulation" paint may make the coated aluminum expand less than the uncoated aluminum and possibly lead to movement between the two areas, then possibly lead to leaks or other issues.

I doubt it. The temperature difference is likely to be very little. I tend to think that most "insulating" coatings tend toward snake oil and make little difference unless they really reflect a lot of infrared... Even then there are probably more temperature differences between parts of an AS in the shade and in the sun.


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Old 09-17-2015, 08:33 AM   #13
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There is actually quite a bit of difference in temps between a white coated airstream roof and the uncoated bare aluminum. I have mine covered with ceramiflex and while you can comfortably put you hand on the white side, the bare side will burn. But it isn't due to any insulating qualities, rather that the white reflects most of the energy back where the bare aluminum does not. As for movement in-between, I haven't seen anything. When you think about it, it will actually be a temperature gradient between the warm and hot sides due to diffusion.
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Old 09-17-2015, 04:28 PM   #14
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Quote:
Originally Posted by aquinob View Post
There is actually quite a bit of difference in temps between a white coated airstream roof and the uncoated bare aluminum. <snip> When you think about it, it will actually be a temperature gradient between the warm and hot sides due to diffusion.
Absolutely. There will be a gradient, but it will be a pretty quick transition between the absorptive aluminum and the reflective white coating.

But maybe it "ain't that big a deal." I just used an online calculator, and with a temperature difference of 104 deg F to 140 degF, the difference over 20 linear feet is only about a hundredth of a foot - roughly an eighth of an inch.
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