3/8″ INSULTHERM SLEEVE BLACK

Insultherm Fiberglass Sleeve — 3/8″

The Insultherm 3/8″ Fiberglass Sleeve — SKU: FGL038BK is a high-temperature woven fiberglass harness sleeve for thermal protection of motorsport wiring in extreme-heat engine bay, exhaust-adjacent, and turbo-adjacent harness sections on race cars across Norway, Sweden, and Denmark. Supplied in cut length. Black colour provides a clean finish in engine bay installations.

Size and Application — 3/8″

At 3/8″ nominal diameter, suited to medium harness bundle protection in high-temperature race car engine bays and exhaust tunnel loom runs. Woven fiberglass withstands sustained high temperatures that would damage polyethylene or PVC sleeving — the correct choice wherever a harness run passes through the highest-heat zones of a race car. Supplied in cut lengths for motorsport harness build and repair.

Woven Fiberglass — High-Temperature and Abrasion Protection

Insultherm fiberglass sleeve resists sustained temperatures beyond the capability of standard expandable or fabric sleeving. The woven construction also resists abrasion — protecting the harness from both thermal damage and mechanical wear in tight engine bay routing. Used by motorsport harness builders across Norway, Sweden, and Denmark for high-heat harness sections.

Technical Specifications — FGL038BK

• Type: Insultherm Woven Fiberglass Sleeve
• Size: 3/8″
• Colour: Black
• Material: Woven fiberglass
• Format: cut length
• Application: High-temperature engine bay, exhaust-adjacent, and turbo-adjacent harness sections