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Solar Heat Reflective Paint

(this entry appended to this thread by editor in lieu of spawning a duplicative thread)
RFQ: I am keen to explore mass manufacturable coatings for aluminium that forms battery housing for two wheeler batteries that are exposed to the sun.

The idea is to limit the infrared heating.

I also want to understand the colours, textures and physical properties available for the coatings as this will be a visible and aesthetic surface.

I am keen to hear answers, but also if you have or know of a consultancy please feel free to reach out as I am managing a project for a major OEM


Tavish Kotian
- London, UK
December 6, 2022
    privately respond to this RFQ   ^
Ed. note: As always, gentle readers: technical replies in public and commercial replies in private please (huh? why?)

A. Hi. I can answer the first question about colors: if you want to limit infrared heating, white is your only choice. The other questions you ask are a bit more complex, but white paints which are advertised as containing ceramic particles for better reflectivity do in fact work.
Luck & Regards,
pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha - Pine Beach, New Jersey

⇩ Closely related postings, oldest first ⇩

Q. I am looking for a solar heat reflective paint (carc) for a project I am working on - Any Ideas?

Patty MacDonald
- Woodbridge, Virginia

Insulating Paint Additive

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A. Hi, Patty. My first approach would be to look for white paint rather than black.

But you might also see topic 18535, wherein Dr. Con Lozanovski advises of university tests showing the effectiveness of putting reflective ceramic powder into the paint.

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

A. Hi. A product worth checking out for metal roofs, that I can recommend is Insultec, search for it on the web.

Carl Cristie
- Noosa QLD Australia

Solar window film

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Q. I have a big window on the west side of my office that the sun bakes though in the late afternoon and really heats up the reception room. I would like to know if there is a product that could be painted on the outside of he window that would reflect the suns rays, but be clear enough to see through.

Thanks a bunch!

Ken Alley
consumer - York, Nebraska

A. Hi, Ken. Rather than trying to find a transparent paint that would stick to glass and would cover it at uniform thickness, Ken, manufacturers tend to offer this instead as a
<== plastic film instead.

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

A. My experience has been that the inorganic, mixed metal oxide pigments, in some parts of the globe called "ceramic powder" pigments for paints and coatings are every bit what they claim to be. We are uncertain though about ceramic micro-spheres in paints, whether factory mixed or consumer additive) or the assertion that any paint provides insulation value as some claim. An R value measurement of insulation efficiency is a building industry term only associated with bulk layer, SPF foam, styrofoam. or fiberglass panels that are installed. How can something microns thick provide the same R value of 7 when it takes at least an inch of foam to do the same thing? It makes no sense.

The commercial roofing industry had the mixed metal oxides we use in our paints and coatings over 30 years ago and continues to do so with factory coated, baked-on metal roofing.

The U.S. Dept. Of Energy study finished last year and a University of Nevada (UNLV) completed in 2006 showed very strong energy savings in mixed metal oxide pigmented paints on test homes in multiple cities. Due to their high solar reflectively and thermal emissivity for exterior walls, these found electricity use reductions for air-conditioning of 24% in Las Vegas, 21.9% in Los Angeles, 13% in Sacramento. Walls plus roofs (UNLV Study) so coated. showed a 41% total energy savings measured in reduced KWh consumption.

Michael Biel
coatings company - Sausalito, California

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