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Mineral wool
Fiber made from spun molten minerals / From Wikipedia, the free encyclopedia
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"Rockwool" redirects here. For a manufacturer, see Rockwool International.
Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics.[1]
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Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation), filtration, soundproofing, and hydroponic growth medium.