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Old 07-21-2014, 08:58 AM   #61
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Re: Insulating paint beads: Feedback from REAL people please

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Originally Posted by IronChariot
Are your sample pieces physically touching each other? That would also be a no-no.
The sample pieces have a small gap between, but even if there were no gap it would only impart an immeasurable difference considering that the temperature range is so low. The cut surfaces are rough and steel (in comparison to other metals) doesn't transfer heat well enough to make much of a difference. If the pieces were a difference of 100s of C then a large insulating gap would be necessary. Furthermore, I'm measuring the temperature from the center of the pieces.
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Old 07-22-2014, 06:58 AM   #62
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Re: Insulating paint beads: Feedback from REAL people please

I'm sure you're right re heat transfer. Again, excellent work with the test. I had pretty much bought the hype re the beads, so it's good to have some real data. It always pays to be skeptical.

Do you think something like sand (think something larger than sandbox sand) would work as well as sawdust? I suspect it would work better than sawdust with the paint, but hard to tell if it would work as effectively re temperature. Testing other materials might be a good next step if you are so inclined.
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Old 07-22-2014, 10:39 AM   #63
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Re: Insulating paint beads: Feedback from REAL people please

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I'm sure you're right re heat transfer. Again, excellent work with the test. I had pretty much bought the hype re the beads, so it's good to have some real data. It always pays to be skeptical.
Yeh, it was easy to be skeptical after reading Hytech's website. It looks like it was built in the Geocities era and there is no real scientific data on the site, just customer testimonials. "Wow! It works!", but compared to what? A dark red brick wall? Black asphalt shingles? Or competing roof paints? Then, after searching for real-world tests and turning up few it made sense to test for myself.

Here are a couple other tests of products with similar claims. I'm only including a few that actually make sense. As in comparing white paint to white paint + additives:
http://www.amazon.com/review/R1RW7B8...cm_cr_rdp_perm
http://www.cchrc.org/docs/Insulating_Paint_Final.pdf

Quote:
Originally Posted by IronChariot
Do you think something like sand (think something larger than sandbox sand) would work as well as sawdust? I suspect it would work better than sawdust with the paint, but hard to tell if it would work as effectively re temperature.
I would expect sand to have a similar effect, though it does transfer heat better than sawdust would. It would add considerable surface area, which is probably a contributing factor to the paint + additive effectiveness. It would also provide a non-slip surface for walking about up top I still wouldn't recommend it, though. The nicest option appears to be many layers of roof-paint. You'll end up with a nicer paint job and it works great.

Quote:
Originally Posted by IronChariot
Testing other materials might be a good next step if you are so inclined.
Nah.. I'm good I found the answer to the question, "Are the Hytech beads anything extraordinary?". The answer is no. Now it's up to the people to decide what to do with that information. Adding them helps a bit, as will any additive to the paint, but thicker paint is the best option in my opinion.
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Old 07-25-2014, 06:14 PM   #64
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Re: Insulating paint beads: Feedback from REAL people please



Didn't have any use for the talcum powder that is Hytech ceramic insulating beads, so figured I'd just give it back to the earth... A dramatic gesture, I'm sure
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Old 07-28-2014, 01:47 PM   #65
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Re: Insulating paint beads: Feedback from REAL people please

Has anyone try linex paint coating on the roof(white color)? is used for truck beds.
http://www.linexoftucson.com/dealer_sprayon.php
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Old 09-08-2014, 09:25 AM   #66
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Re: Insulating paint beads: Feedback from REAL people please

Line X would be great for sealing but it's not reflective. Not sure how much it would help. Now if you had a "leaker" and wanted it for that purpose with a white roof as a side effect then heck ya!

Another one for inquiring minds.....

Glass beads from road paint? I'm assuming they would do the same at the ceramic beads, as they are VERY reflective on a freshly painted street. You dont mix them in, you add them to the surface of the wet paint. So 3 coats of the roof paint then do a final thick coat and sprinkle a nice thick coat of glass beads on it as you go. Plus as a side effect you could probably be seen from space!! The beads last forever but are a wearable item on the road, but in this application I don't see them losing their "shine".


Just dont drop any amount on a smooth floor because it becomes like ICE. Pretty funny around the shop actually lol.
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Old 09-08-2014, 12:49 PM   #67
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Re: Insulating paint beads: Feedback from REAL people please

I couldn't afford the beads you are asking about so I tried these other beads. They didn't work out as well as I would have hoped.

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Old 11-28-2014, 05:28 PM   #68
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Re: Insulating paint beads: Feedback from REAL people please

beautiful information! love your thread, particularly the attention to detail in explaining your reasoning behind the way you built everything.

any input on using the solarflex and mixing in a different, cheaper form of microsphere? something like these http://aircraftproducts.wicksaircraft.c ... b23-500--g?
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Old 11-28-2014, 06:40 PM   #69
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Re: Insulating paint beads: Feedback from REAL people please

This is what I added to the roof of my Thomas: http://www.uscomposites.com/fillers.html (the 3m glass bubbles). As far as real world testing I normally drive a school bus with a white roof and the interior of the Thomas was noticeably cooler. If it's really just a matter of thickening the paint the glass bubbles are about as cheap as you can go and probably wouldn't change the color of the paint as much as sawdust.
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Old 05-18-2017, 09:36 AM   #70
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Lots of great information here. Thank you.

Any new news/developments on roof painting options in the last couple of years?

I am looking to paint the sides of my roof (center is covered in solar panels) next weekend. . .wondering what the best option is for a bus with little/no existing insulation.

..Jules
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