Is an insulator a physical or chemical property?

Answer 1

it's pysical, since it does not produce heat itself,

e.g: the human body produces heat, but your coat- (the insulater) though it helps you keep warm, the coat is not producing heat and is atually keeping body heat inside the insulation.

Answer 2

An insulator is a physical property because it describes the material's ability to resist the flow of electricity. It is not a chemical property, which would involve the substance's composition and reactivity.