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Old 06-24-2014, 09:46 PM   #31
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Re: Insulating paint beads: Feedback from REAL people please

To make this test more realistic, can you do it in Arizona?
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Old 06-24-2014, 10:50 PM   #32
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Re: Insulating paint beads: Feedback from REAL people please

Not yet. The bag of Hytech ceramic beads came in, but the walmart nearby only has the Kool Seal in 5 gallon buckets. I only need 2 gallons, so I'm waiting it out a bit.
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Old 06-24-2014, 11:08 PM   #33
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Re: Insulating paint beads: Feedback from REAL people please

Does the bus kote have the beads in it, or are those bought seperate?
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Old 06-24-2014, 11:11 PM   #34
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Re: Insulating paint beads: Feedback from REAL people please

The Bus Kote has the beads in it already, but I bought them separately to add to Kool Seal which is essentially the same paint base (white elastomeric coating, Energy Star, etc..). This way I can try Kool Seal on its own, then try it mixed with the beads.
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Old 07-08-2014, 10:50 PM   #35
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Re: Insulating paint beads: Feedback from REAL people please

and then what happened??

i'm getting to the point where this is extremely important! and if it turns out i can save a few $$ for other things, that would be good to know!

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Old 07-09-2014, 08:31 AM   #36
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Re: Insulating paint beads: Feedback from REAL people please

Still don't have the paint.. Should be happening soon.
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Old 07-10-2014, 10:59 PM   #37
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Re: Insulating paint beads: Feedback from REAL people please

I'm watching this closely. Thank you for the effort.
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Old 07-14-2014, 07:22 PM   #38
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Re: Insulating paint beads: Feedback from REAL people please

Alright, I made some progress.


This sheet metal will do just fine for testing. It's a piece of the bus ceiling and is the same gauge thickness as the roof. White on one side, black on the other.


Six equal sized pieces cut. 12"x20".


All pieces cleaned and mounted on a frame built of scrap wood. I turned one of the pieces over so we can determine the temperature difference between plain black and white paint.


I picked up 5 US gallons of Henry's Solarflex



Here we have the magic beads. I was really disappointed in the labelling. It up-talks the product a bunch, but contains no useful information about the contents. Specifically weight or volume. I had to dump it all into bowls then measure it back into the bag to find out that it contains 4.25 cups (just over 1 litre). The package says the contents are properly measured for 1 US gallon (3.79 litres) of paint.



Since I only need a small amount of paint for this test run, I mixed 0.5 quarts (473 millilitres) of paint with a bit over 0.5 cups (125 millilitres) of Hytech beads; a ratio of 3.79:1.


Now, the elastomeric paint alone is obviously going to be thinner than elastomeric paint + ceramic beads. As such, I would expect the straight paint to be less effective (less material, thinner thermal-bridge). I wanted to have a test sample that would be about the same thickness as the paint + beads so I whipped up a batch of paint + sawdust using the same ratios.


Here it is all painted up! From bottom to top: 2 coats elastomeric paint + sawdust; 2 coats elastomeric paint + beads; 2 coats elastomeric paint; 4 coats elastomeric paint; black painted side up; off-white painted side up. I'll post some test results at midday when it's good and sunny.
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Old 07-14-2014, 07:35 PM   #39
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Re: Insulating paint beads: Feedback from REAL people please

Quote:
Originally Posted by crazycal
To make this test more realistic, can you do it in Arizona?
Will that actually make any difference? I can't see how.. The difference in temperature should remain the same anywhere on the planet. Let's say, theoretically, that the ceramic beads reduce the temperature of the substrate by 20C while the sunny is beating down at a perpendicular angle. In the north the white panel with beads may be 30C with the sun shining on it. A black panel may be 50C. In the tropics the white panel with beads may be 45C. A black panel may be 65C...
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Old 07-14-2014, 07:43 PM   #40
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Re: Insulating paint beads: Feedback from REAL people please

Oh, quick note on texture.

So far, the nicest texture, in my opinion, is the 4 coats of Henry's paint with no beads or sawdust (surprised?). It is lightly textured and uniform in appearance. The 2 coats of Henry's paint is less even.

The paint with beads doesn't look bad, but you can feel and see the irregularity that the beads impart.

The sawdust is pretty rough since I didn't bother sifting to get only the real fine dust. There are a couple of chunks stuck in it. It actually looks a bit like stucco. If I would have eliminated the bigger chunks it probably wouldn't be all that bad. It's not really practical at any rate, though, since wood absorbs water.
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