Fireproof sewing thread is produced by our company.it can resist high and low diffient temperatures. Fireproof sewing thread is made of high temperature ... , cable padding material, fireproofing material, wick, sealing product, voluble electrothermal thread, and heating elements.Its specification:Diameter: 0.1-3.0mm1 ... *15, FLSI 33*18, FLSI 33*24, etc. fireproof sewing thread