BST-EFRS Heat Protection silicone fiberglass sleeve for Hydraulic and pneumatic hose made of braided fiberglass yarns in a flexible substrate, then coated with a high grade silicone rubber. It is a self-extinguishing thermal protection sleeve. Silicone rubber on our fire sleeve sheds molten metals, slag, welding splatter, electrical or grinding sparks and contamination.
It offers excellent short term flame protection and  great insulation properties for high temperature. 
Resistant to hydraulic fluids, oils and fuels and can protects against molten splash and flames. 
It's mainly used in steelworks, glass and ceramic industry, in railway and some other fields, protect cables, wires and hoses with very high temperature.