Insulation is material that isolates a physical property. Usually this refers to either:
- Electrical insulation which prevents electricity from going where it isn't wanted.
- Thermal insulation which prevents heat from going where it isn't wanted.
- internet: http://www.world-trades.com/pro/490/508-1/pvc-insulated-flexible-wirebuilding-wire-93167.html
- Radomil. (May 19, 2015). Glass Wool Insulation [Online]. Available: http://commons.wikimedia.org/wiki/File:Glass_wool_insulation.jpg#/media/File:Glass_wool_insulation.jpg