The folks at Aerogel.org are serious about it: The "Make" section of their exhaustive "open source aerogel" site will teach you how to make high-quality
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Making Aerogel At Home
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» How is Aerogel Made?
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Aerogel – the micro structural material of the future - Numerous new application possibilities in the high-tech industry, for example in microelectronics, robotics, biotechnology and sensor technology