MTJSWXSY Braided Split Wire Loom 3/8" x 20ft Heat-Resistant

MTJSWXSY automotive braided split wire loom is a 20ft, 3/8" self-wrapping, heat-resistant cable sleeve designed to protect and organize wiring harnesses in high-temperature, abrasion-prone environments.

Whether you’re tidying engine-bay wiring, protecting motorcycle harnesses, or organizing workshop cables, this braided PET split-sleeve offers a balance of thermal protection, abrasion resistance, and flexible installation. Built from woven heat-retardant PET, it tolerates elevated temperatures while providing a neat, professional finish to wire bundles without the need for extra tape or zippers.

How hot can this braided wire loom handle and why does that matter?

The MTJSWXSY sleeve is made from a heat-retardant woven PET material engineered to resist temperatures up to 302°F (150°C). That high-temp tolerance helps reduce insulation degradation in engine compartments and other hot areas, extending wire life and lowering maintenance needs.

• Rated thermal resistance up to 302°F (150°C)
• Braided weave disperses heat across the sleeve
• Suitable for engine bays, exhaust-adjacent wiring, and heated tool areas

Will it protect wires from abrasion, dirt, and moisture?

The tight, abrasion-resistant braid shields wires from chafing, road grime, and incidental contact with rough surfaces. The construction sheds dirt and allows drainage, so harnesses remain cleaner and are less likely to suffer wear from debris buildup.

• Tightly woven for strong abrasion resistance
• Design resists mud and channels moisture away
• Ideal for off-road, industrial, and fleet vehicle use

How easy is it to install or service wires with this split sleeve?

The side-entry split design and self-wrapping construction make installation and maintenance fast and tool-free. You can wrap the sleeve around existing harnesses, perform mid-run cable breakouts, or re-enter bundles quickly without cutting or fully disassembling the loom.

• Side-entry split for retrofitting existing harnesses
• Self-closing 25% overlap keeps the braid secure without tape
• Supports quick additions or removals of individual wires

Does this sleeve stay flexible while providing coverage?

Yes — the braided construction balances coverage with flexibility so wires can bend and route through tight areas without the sleeve separating or kinking. The overlap design maintains wrap integrity during vibration and movement common in vehicles and machinery.

• 25% overlap minimizes mesh separation and twisting
• Maintains flexibility for routing through harness channels
• Durable under vibration and repeated handling

Who is this for? The MTJSWXSY 20ft, 3/8" braided split-sleeve is suited for automotive enthusiasts, mechanics, electricians, fabricators, and fleet maintenance teams who need a durable, heat-resistant way to protect and organize wiring. It’s especially useful for engine-bay wiring, motorcycle and ATV harnesses, industrial equipment, and any application where ease of installation, abrasion protection, and thermal performance are priorities.

Package includes a one-year warranty from MTJSWXSY — if you encounter defects within the first year, the company offers a refund and replacement without requiring returns. The black finish provides a low-profile, professional look that blends with most vehicle and equipment interiors while delivering reliable cable management benefits.