FIW3.75RD

Description

FireFlex-WRAP 3.75″ Red — Self-Wrapping Silicone Fibreglass Heat Tape for Motorsport Harnesses

The FIW3.75RD is a 3.75″-wide FireFlex-WRAP self-adhesive silicone fibreglass wrapping tape in red, designed for field-applied heat protection on motorsport wiring harnesses, hydraulic lines, and fuel system components near high-temperature engine bay heat sources. FireFlex-WRAP is suited to maximum-width wrapping for the largest motorsport harness assemblies requiring complete thermal coverage. The self-fusing silicone construction adheres to itself without adhesive when wrapped under tension, creating a continuous sealed outer layer that provides both heat reflection and mechanical protection over the wrapped section.

FireFlex-WRAP vs FireFlex Sleeve — Choosing the Right Format

FireFlex sleeve (the FIN series, sold separately) is a pre-formed sleeve that slides over a wire bundle from an open end — ideal for initial harness construction where the sleeve can be installed before connector ends are fitted. FireFlex-WRAP is a field-applied tape that wraps around an existing harness section from the outside — ideal for retrofitting heat protection to an existing harness without disconnecting connectors, for protecting shorter sections where a sleeve would need trimming, or for protecting irregular-geometry areas where a straight sleeve does not conform well to the harness routing. Both use the same silicone fibreglass material for comparable thermal performance.

3.75″ Width — Application Range

The 3.75″ wrap width suits maximum-width wrapping for the largest motorsport harness assemblies requiring complete thermal coverage. Narrower wrap widths suit smaller bundles and allow tighter wrapping around corners and bends in the harness routing; wider widths provide faster coverage of large-diameter trunks but are less conformable around tight bends. For large-diameter primary loom trunks, wider wrap is more efficient; for smaller sub-harnesses routed near exhaust, narrower wrap provides better conformance around bends.

Red Colour — Visual Identification

The red colour of FireFlex-WRAP provides immediate visual identification of heat-protected harness sections, distinguishing them from standard unprotected or nylon-sleeved harness sections during vehicle inspection and service. Red-wrapped sections signal to mechanics that the underlying wiring is routed in a heat-critical zone and should not be re-routed without reinstating the heat protection.

Available from Arctic Performance Parts

Arctic Performance Parts stocks FireFlex-WRAP in widths from 1″ to 4″ to support motorsport harness heat protection across all harness bundle sizes. Supporting professional harness builders and motorsport workshops across Norway, Sweden, and Denmark. Lead time 1–2 weeks for quantities beyond current stock.