BSTFLEX Fiberglass sleeve with fire sleeve under high temperature test, the fire gun is 800-1000 degree, it is less than 60 degree C in 2 min inside of these sleeve.

The fiebrglass sleeve is 3mm thickness. 

Fire sleeve is constructed from high bulk glass fiber sleeve coated with silicone rubber. Excellent modulus of elasticity makes it an excellent choice for bundling hoses, tubes and cables in a variety of hostile environments. We provide different type fire sleeves.

Certifications for firesleeve:
MSHA, -70 degree C Test, 260 degree C test, UL 1441, ROHS, REACH
DIN EN45545-2:2020 Rail Certificateion
DIN 45545 Low smoke toxicity
DIN 54837/5510-2 Rail vehicle certificated for resistant to combustibility
NF EN ISO 11925-2 (15 AND 30 SEC)
TB/T 3138-2018 Technical specification of flame retardant materials for railway locomotive and vehicle