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#9144 09/02/06 08:48 PM
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This insulation company have made claims of R-15 per 5mil thickness for their coating product.

I feel they are playing fast and loose with the R-value claim.

Ceramic Space shuttle tiles are R-50 / Inch. At R-15 / 5mil that's R-75 / Inch, They quote the cost for 5 Mil at .35 cents / Sqft, that would be $1.75 / Inch ??......

I thought That these low resistance numbers were primarily from the vacuum spaces, I can't see how the molecular vibrations responsible for conduction are less in a paint binder than the matrices of the Shuttle's ceramic tiles??

They claim that their low conductance is due to the The Knudsen effect ....that was new to me.... but makes sense. http://www.industrial-nanotech.com/howitworks.htm , But they still obfuscate about publishing U or R values.

Why can't this company have these numbers, U and R-values, verified by the government labs or construction product testing institutions?

That would end this discussion.


They claim That Aerogels are the only material that has a lower conductance, but

Aerogel Panels http://www.kalwall.com/nano1.htm are R-20 @ about 2 inch thickness.

However, This other Nano insulation company has no problem claiming a r-value of R-40:

http://www.nanopore.com/thermal.html


Please, I need some thermo dynamic help here.


Erich J. Knight


Erich J. Knight
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Can't comment on their claims, though I agree
with you it sounds a bit too good to be true.
What I can do is flag a caution:
They claim to use an acrylic resin base and give
no data on UV resistance which has been a problem
with this material for exterior applications in
the past.

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personally, i see to many risks with it, to not wait until its been confirmed.


the more man learns, the more he realises, he really does not know anything.
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Aspen Aerogels has a good technical discussion on this subject tha clears up at least some of my questions. Here's the link:

http://www.aerogel.com/features/termal.html


Erich J. Knight
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Correction on R-value

The http://www.industrial-nanotech.com/howitworks.htm page shows R values of 10 - 13 per inch which does not seem to be quite as unreasonable as I thought. The R-15/5mil number I posted was found on a stock discussion forum, second hand, reported from a company officer, he was obviously off base.


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I think when you are using an insulating material of any sort. One needs to be aware of what exactly you are insulating against.
One particular instance is 'Fire resistant paint'
Which when painted on the surface of plywood, stops it from catching fire even under the direct flame of a blow (kerosene?) torch.
Manufactures keep their formulations secret. But
most rely upon the ability of the paint to expand and form thousands of stiff carbonised bubbles, that keep the flames from catching the wood on fire.


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"You will never find a real Human being - Even in a mirror." ....Mike Kremer.



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