insulation

(noun) the state of being isolated or detached. Synonyms: insularity, insularism, detachment. Example: "The insulation of england was preserved by the english channel."

(noun) a material that reduces or prevents the transmission of heat or sound or electricity. Synonyms: insulating material, insulant.

(noun) the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity.