Aerogel with CO2 is pretty common, I wonder if helium aerogel will be viable, or if the helium would slowly escape like it does in a balloon? I don't think we c

Aerogel with CO2 is pretty common, I wonder if helium aerogel will be viable, or if the helium would slowly escape like it does in a balloon? I don't think we could use hydrogen for it as supercritical hydrogen sounds very dangerous.