Insultherm Fiberglass Sleeve — 1″
The Insultherm 1″ Fiberglass Sleeve — SKU: FGL100BK 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 — 1″
At 1″ nominal diameter, suited to full primary loom and maximum-diameter harness trunk thermal protection in engine bay and exhaust tunnel installations. 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 — FGL100BK
- Type: Insultherm Woven Fiberglass Sleeve
- Size: 1″
- Colour: Black
- Material: Woven fiberglass
- Format: cut length
- Application: High-temperature engine bay, exhaust-adjacent, and turbo-adjacent harness sections












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