Remove performance-limiting heat rapidly from deep within ever-denser, more-powerful electronics, and shielding, without adding size, weight, or short-circuits, even in high RF, via nanotube thermal fibers of strong/flexible ceramic, white-graphene, that can extend anywhere within circuit-packages without adding weight because, though they conduct heat, they can block electricity (and neutrons) … while transparent to wireless/RF and surviving extreme temperatures. Early tests increase thermal conductivity of thermal interface materials 80% with less than 1% additional loading, even unaligned; newly-validated yarns (processes like Kevlar) will be aligned and woven for far more. A NASA Invention-of-the-Year spin-out with inventors from NASA and National Labs, now the global leader in dielectric nanotubes, we seek collaborators and investors with sophistication, and channels, in electronics, hypersonics, and materials with high-value thermal or radiation challenges.