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Old 06-09-2014, 10:47 PM   #11
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Re: Insulating paint beads: Feedback from REAL people please

Tango and all. When I was working on the hot air exchange ducting for my genny, I discovered that I got very different IR temp readings when the outside and inside of the ducting were different colors than when they were the same color. I suspect that the IR reflectivity of the non matched colors was different. For example, I found that bare steel, bare aluminium and bare galvanized metal gave far lower IR temps than did the same parts under the same conditions when painted. Much as I love my IR temp gun, I now take its readings with a grain of salt--on the other hand, perhaps using your hand to detect heat differences between similarly treated (beads) and untreated (no beads) surfaces is the best way to settle the "should I or shouldn't I use glass beads" question. Hows that for tossing mud into the water? Me, I can't afford the beads so I just went with white paint on the roof--my hand says it makes a huge difference
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Old 06-10-2014, 01:32 AM   #12
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Re: Insulating paint beads: Feedback from REAL people please

Roger the "Palmer Method" Jack --- Likewise, it was just my hand that said..."man...this is a whole lot cooler than it oughta' be".
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Old 06-10-2014, 07:22 AM   #13
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Re: Insulating paint beads: Feedback from REAL people please

I have not used the insulating beads. I put Henry's SolarFlex (reflective elastometric) on our bus roof. It reflects the sun and does work well. We coated the roof of the Class C with Snow Roofing's elastometric and it was similar results. I wore pants the day I roled the first coat on and I sunburned under my pants up to my knees from the reflected sun. These are both white elastometric roof coatings for residential use. The most dramatic result was when we used leftover Snow on our uninsulated white cargo trailer we used to have. It went from not being able to touch the interior ceiling with out raising a blister, to the next day (coated) and a hand could be laid in the interior metal and it was very warm but you could leave your hand on it. Both days were similar temps and clear sunny skies. Henry's was easiest on my rather lean pocket book. A 5 gallon can was spread (in several coats) on a 40 ft bus. These products are the ones I decided on after a lot of research. I think the reflective nature of the SolarFlex elastometric helped provide a barrier to the thermals and with the addition of the PVC/air pocket strips over the interior rivets, the thermal transfer has been greatly reduced. I know temps inside have dropped with the addition of the PVC/air pocket strips over the rivets.
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Old 06-10-2014, 10:23 AM   #14
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Re: Insulating paint beads: Feedback from REAL people please

I do have photos of my temperature testing. Thursday afternoon it was 87 outside and full sunlight. The exposed steel was 109.9 and you could feel the heat coming off it. I painted on the Bus-Kote with the beads and Sunday at almost the same time and temp of 87 and full sunlight. The exposed steel felt cool. The tempů 89.9 Almost a twenty degree drop. This paint is a bright white I had to wear sunglasses when painting.
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Old 06-11-2014, 05:07 PM   #15
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Re: Insulating paint beads: Feedback from REAL people please

Here is the proof.

Before Bus-Kote



Same spot same temp and weather three days later, after Bus-Kote.



Today it is in the 90's, bus shut up all day. The inside is same as if you where in the shade. Steel still feels cool to the touch. I'm sold.
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Old 06-11-2014, 06:32 PM   #16
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Re: Insulating paint beads: Feedback from REAL people please

Now all we need is the same test without beads and then we could say one way or the other with some actual science to back it up--at this point it is too early to say the beads really work. All that can be said for sure is that there is a big positive improvement as far as the test has gone to date.
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Old 06-11-2014, 06:35 PM   #17
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Re: Insulating paint beads: Feedback from REAL people please

My thoughts exactly, ol' trust. We know white paint works, white elastomeric paint probably works better, now we just need to know if:
(beads + elastomeric white paint) > (elastomeric white paint)
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Old 06-11-2014, 09:04 PM   #18
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Re: Insulating paint beads: Feedback from REAL people please

It may take awhile, but I can slowly pick all the beads out of the paint and do a re-test for you.
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Old 06-11-2014, 09:13 PM   #19
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Re: Insulating paint beads: Feedback from REAL people please

Haha. Excellent! We'll have the results by 2030. Which, at the rate I'm going, is probably when I'll be rolling that paint on the roof!
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Old 06-11-2014, 09:57 PM   #20
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Re: Insulating paint beads: Feedback from REAL people please

W/B That was both a humorous and very polite response to some old SOB (me) picking flaws with your statement. It is truly the mark of a mature individual who can allow for different opinions without getting his knickers in a knot--thanks. Jack
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