Tephrex® Knitted Basalt Ropes

Compared to traditional fiberglass ropes, knitted basalt ropes can provide enhanced temperature and abrasion resistance, functioning as an excellent thermal barrier in applications with continuous operating temperatures of 1382°F (750°C). Our basalt rope can be constructed in soft or dense forms with unique physical characteristics and seal performance and coated with different materials for varied purposes. Knitted basalt rope is manufactured in both standard and custom sizes and designed in different forms and densities to create the best seal for your application.

Quick Reference


  • Basalt Fiber Yarn


  • Knitted

Recommended Operating Temperature

  • 1382°F (750°C)

Size Range

  • 1/16″ (1.6 mm) to 4″ (102 mm)


  • Transportation
  • Power Generation
  • Boiler
  • OEM


  • Gaskets
  • Heat Containment

Custom Options

  • Special Bulk Packaging
  • Coatings
  • Pressure Sensitive Adhesive


  • REACH Compliant
  • RoHS Compliant
  • Free of Chemicals Listed in California’s Safe Drinking Water & Toxic Enforcement Act of 1986 (Cal Prop 65)
  • Free of Conflict Materials
  • Free of Asbestos

Read Our Thermal Protection Product Guide

Need some help navigating your project needs and our technical textile solutions? Browse Davlyn Group’s guide for thermal protection solutions.