nonconductivity; nonconductibility
Technical term used in physics and engineering to describe a material's inability to conduct electricity, heat, or sound.
This material is used as an insulator because of its high nonconductivity.
導電性 means electrical conductivity, the opposite property.
Compound of 不 (non-) + 導 (conduct) + 性 (property). A straightforward Sino-Japanese technical coinage.