insulators

/IH1 N S AH0 L EY0 T ER0 Z/
noun
  1. 1

    A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).

  2. 2

    A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)

    โ€œTo isolate electrical wires from the pylons supporting them, one often uses glass insulators.โ€

  3. 3

    A person who installs insulation.

Source: https://en.wiktionary.org/wiki/insulator, https://en.wiktionary.org/wiki/insulators