4 ms·Very true. Pure silica aerogel = 18-20 mW/mK Solarcore = ~28 mW/mKby OROSapparel 11y agoVery true. Pure silica aerogel = 18-20 mW/mK Solarcore = ~28 mW/mKjdhawk 11y agoWoah, real numbers! Thanks!