11. An alternate less expensive and time-consuming construction method is using dry insulating material . 12. Compared to conventional insulating material , silicone can perform in far higher and lower temperatures. 13. Once begun, PD causes progressive deterioration of insulating materials , ultimately leading to electrical breakdown. 14. Doors, insulating materials , windows and beds also are badly needed. 15. The insulating material is typically made of solid polymers which have issues with degradation. 16. Because their motors are air-cooled, it is impractical to wrap them in sound-insulating material . 17. BPB's other products include plaster, insulating materials , fastenings, decorative wall covering and ceiling components. 18. Using a variety of configurations, two electrodes are separated by various dielectric insulating materials . 19. The insulating material of the substrate forms a dielectric. 20. PCBs, or polychlorinated biphenyls, were used as insulating material in transformers and other electrical equipment.
