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Firesleeve is a term for a silicone coated fiberglass sleeve,[citation needed] generally used in industrial or aerospace applications.

Fiberglass acts as an insulator or barrier for constant temperatures up to 540 °C[citation needed]. Silicone is generally able to withstand temperatures up to about 260C degrees continuous[citation needed]. Silicone, however, has the added benefit of being able to withstand and repel much higher temperatures for short durations[citation needed], including liquid molten metals.

Firesleeve is used as a protective sleeve on industrial hoses, hydraulic hoses, cables, wires, etc.

Firesleeve generally refers to two variations: An aerospace version is made with a braided fiberglass substrate and is commonly used in the aerospace industry[citation needed]. Its construction enables qualified hose assemblies to meet the SAE standards which have been established relative to the protection which this product provides[citation needed].

An industrial version, constructed of a knitted fiberglass substrate is also available. Because it is less expensive it is more commonly used in hot industrial applications where this type of protection is needed. The industrial version will not meet the SAE standards[citation needed].

Fiberglass sleeve—without the Silicone rubber coating—has a higher continuous temperature rating, up to 1000 °F or 540 °C[citation needed] and is available as a knitted or braided sleeve for protection of hoses and cables where molten splash protection or weld splatter protection is not required.

Firesleeve is used for industry, aerospace, automotive, mining and provides a flameshield.

Firesleeve can be modified by adding various closures such as zipsleeve and snapsleeve.