Which of the following materials is commonly associated with insulation?

Asbestos is commonly associated with insulation due to its unique properties that make it an effective thermal insulator. Asbestos fibers are known for their ability to withstand high temperatures, resist fire, and provide soundproofing, which made it a popular choice in various applications such as pipe insulation, thermal insulation in buildings, and boiler insulation in the past.

Historically, asbestos was extensively used because of these qualities; however, it is important to note that its use has significantly declined due to health concerns related to asbestos exposure, which can lead to serious respiratory issues and diseases, including asbestosis and mesothelioma. Today, many safer alternatives to asbestos are used for insulation purposes, including fiberglass, mineral wool, and foam, but in the context of traditional materials associated with insulation, asbestos remains a notable mention.