1.   The board is made of insulating material and a conductor which is etched away leaving the circuitry to which electronic components are later attached by solder.

2.   Asbestos was reportedly not used in the towers as insulating material for the steel beams.

3.   A second major innovation is a change in the thin layer of insulating material between the gate and the silicon foundation on which it sits.

4.   Also, insulating material inside and outside the telescope is aging and becoming brittle, posing the risk of debris that could get into the observatory and damage instruments.

5.   Previously, the window had been covered with insulating material for protection.

6.   The shutter is needed to protect the window against damage from micrometeorites and had been covered with insulating material before the shutter installation.

7.   The window had been covered with insulating material before the shutter was installed, and no one could look out.

8.   Until the shutter was installed, the view through the window had been blocked by insulating material.