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Product Review from Environmental Building News
March 1, 2008
A Low-Emissivity Coating That Really Works
To say that there is a lot of hype about insulating paints and radiant barrier coatings is an understatement. The Internet is rife with claims of paints that dramatically reduce heat transfer—usually based on some technological magic spun off from NASA. While these products may have some relevance in the extreme conditions of outer space, manufacturers of paints containing “ceramic beads” or “sodium borosilicate microspheres” are making claims that defy the laws of physics—and independent test results—when they claim they can save significant energy in buildings. Well-engineered coatings with metallic particles can reduce radiant heat transfer, however. LO/MIT-II from SOLEC–Solar Energy Corporation has a long track record of success and is, at least for now, the only such product made with a water-based, low-volatile-organic-compound (VOC) formulation....
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