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www.reference.com/article/good-insulators-90b0426eb483fbbf

Oil, fur, silk, wool, rubber, glass, plastic, wood, paper, wax and ebonite are good insulators. Insulators are substances with tightly bound outer electrons and heavily resist the flow of electrons. Most nonmetals are classified as insulators.

www.reference.com/article/insulators-c8e2cd3062f10df7

The most accessible and affordable home insulator is rolled fiberglass, and the most effective insulator is closed cell foam, according to HGTV. Cotton batts are a comparable option.

www.reference.com/article/insulation-work-2a03ca5f73fd2801

Insulation slows or prevents heat, sound, electricity, mechanical vibration or radiation from coming through walls. There are four types of insulation: heat insulation, sound and vibration insulation, electrical insulation, and radiation insulation.

www.reference.com/article/good-insulator-53d9c2508103dea9

Materials that make good insulators do not have the ability to conduct electricity, such as glass. They insulate because they do not have enough free atoms to conduct electricity.

www.reference.com/article/insulated-materials-58b41a37c0d18a7b

Insulating materials reduce the heat flow in a home, which allows the air a cooling or heating system produces to stay inside, and protect a home from external temperatures. Insulating materials are given R-values based on their insulating effectiveness; the higher the ...

www.reference.com/science/materials-good-insulators-b06a490d0e37f88b

Good insulators are materials that do not allow heat to pass through them. They are also materials that either slow down or do not allow transfer of electricity through them.

www.reference.com/world-view/good-heat-insulators-1c352538d23ce109

Items that make good heat insulators include fiberglass, air, iron fibers, Polystyrene foam and thin plastic films, according to scientists at the Argonne National Laboratory. Some insulators work by having pockets of air to spread out heat. Other insulators reflect lig...