insulator

Etymology

insulate + -or

noun

1. A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).
2. A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)
   To isolate electrical wires from the pylons supporting them, one often uses glass insulators.
3. A person who installs insulation.
   Alan Vasen worked as an insulator at this site from September 1968 through mid-April 1969. Mr. Vasen installed thousands of lineal feet of asbestos pipe covering and thousands of square feet of asbestos block insulation throughout the operating units of the Benicia refinery. 2007, Kenneth S. Cohen, Expert Witnessing and Scientific Testimony: Surviving in the Courtroom