Knitted Basalt Sleeve

Contact us for a sample or Quote

Basalt Sleeve Overview

Davlyn’s Basalt Sleeve provides a high-performance solution for the more extreme temperature applications. Made from volcanic rock, our basalt products are environmentally friendly, 100% recyclable, and non-hazardous.

Knit Basalt Sleeves are constructed with basalt fiber yarns knit into a heavy-wall sleeve to provide an exceptional combination of enhanced heat resistance, thermal performance, and durability when compared to typical fiberglass sleeve products. Recommended for a continuous operating temperature of 1382°F/750°C, Basalt provides an excellent exhaust heat shield.

We also offer a wide variety of cutting and stitching options including serge, lock, and chain, making Davlyn your one-stop shop for custom solutions.

Our Basalt Sleeve facilitates an increase in the efficiency of a vehicle’s emission control system through the retention of high temperatures as gases flow through the exhaust system.

The knit basalt sleeve has a durable, light-weight construction that provides excellent flexibility expanding 1.5x its diameter for easier installation around tight bends and over fittings, couplings and other obstructions. The dense single-wall design provides optimal coverage and minimizes snagging during installation. In addition, the knit construction allows neat, easy field-cutting without specialized tools. Knit basalt sleeve is the ultimate solution for extreme heat applications.

Country of origin: U.S.A.

Manufactured in accordance with our ISO 9001:2015 certified quality management system

Knitted Basalt Sleeve Quick Reference


  • Basalt fiber yarn


  • Knitted

Recommended Operating Temperature

  • 1382°F/750°C

Size Range

  • Sleeve: 1" (25.4mm) through 6" (152.4mm)


  • Transportation (Aerospace, Auto, Locomotive, Heavy Equipment, Heavy Truck)
  • Power Generation
  • OEM


  • Engine Exhaust Systems
  • Exhaust Gas Recirculation (EGR) Tubes
  • Insulation/Heat Containment

Custom Options

  • Special bulk packaging to maximize productivity/minimize waste
  • Custom pre-cut lengths available
  • Custom sewing: serge, lock, and chain

Knitted Basalt Sleeve

Davlyn’s knitted basalt sleeve is manufactured from Basalt fiber yarn that has been knitted to form a sleeve. The dense single-wall design provides excellent thermal protection, does not fray easily, and because of the knitted design, expands in diameter for optimal coverage around awkward shapes and bends. In addition to automotive applications, it can also be used over pipes and to protect hoses and cables from high temperatures. The knitted construction is resistant to most oils, fuels, acids, alkalis and other fluids and allows neat, easy field-cutting without specialized tools.

Certifications / Approvals / Standards

  • ASTM G85-11
  • ASTM D-5132
  • SAE J369
  • ISO 3795
  • FMVSS 302
  • CMVSS 302
  • PSA D45 1333
  • REACH Compliant
  • RoHS Compliant
  • Does not contain chemicals listed under on California’s Safe Drinking Water & Toxic Enforcement Act of 1986. Commonly known as Proposition 65 (Cal Prop 65).
  • Conflict Material Free
  • Asbestos Free