MTJSWXSY Braided Split-Sleeve Wire Loom 1/2" x 20ft

MTJSWXSY Automotive Wire Loom is a 20-foot, 1/2-inch black braided split-sleeve designed to protect wiring from heat, abrasion, and grime while allowing quick side-entry installation.

This braided split-sleeve cable cover is made from a heat-retardant woven PET material that resists temperatures up to 302°F and disperses heat away from wiring bundles. The mesh’s tight weave and self-closing overlap secure harnesses without extra tape, and the side-entry split makes retrofitting or servicing existing runs fast and simple. Use it in engine bays, under dash clusters, or along exposed harness routes where abrasion, oil, and elevated temperatures are concerns.

How does this sleeve protect wires in hot engine compartments?

The woven PET construction is engineered to tolerate high temperatures and to help spread heat along the braid, lowering concentrated thermal stress on cable insulation. The heavy-duty fiber resists fraying and keeps the sheath intact under thermal cycling and vibration.

• Heat resistance rated to 302°F for prolonged exposure.
• Braided weave promotes heat dispersion across the sleeve.
• Durable fibers reduce chafing from vibration and movement.
• Suitable for use near manifolds, turbo lines, and harness junctions.

Will it stay closed on my wiring runs without extra fasteners?

Yes — the split sleeve features a self-wrapping design with about 25% overlap so the braid naturally hugs the bundle and resists opening. This overlap both simplifies installation and helps keep the braid aligned during routing and maintenance.

• Self-closing split design removes need for tape or zippers in most cases.
• 25% overlap prevents twist and separation over long runs.
• Flexible sheath conforms around uneven or multi-conductor bundles.
• Works well with clamps or ties where extra security is needed.

How easy is it to install and maintain on existing harnesses?

The side-entry split lets you add or remove cables at any point without disassembling the whole harness, so retrofitting existing wiring is quick. The braid slides over connectors and branches, and you can make breakouts wherever needed while still protecting the remaining length.

• Side-entry split for retrofitting assembled harnesses.
• Fast breakouts anywhere along the run for taps and splices.
• Cuts cleanly with scissors to length; edges resist unraveling.
• Low-profile fit keeps bundles tidy in tight spaces.

How durable is the sleeve against oil, dirt, and abrasion?

The precision-woven braid sheds dirt and drains fluids while offering strong abrasion resistance where wiring rubs against metal or plastic surfaces. Its woven structure is designed for repeated handling and protects insulation from wear in harsh automotive environments.

• Tight weave blocks grit and allows fluid drainage.
• Abrasion-resistant fibers extend wire lifespan in rubbing locations.
• Black finish resists staining and blends into engine bays.
• Suitable for areas exposed to road grime, grease, and mechanical contact.

Who is this for: Mechanics, automotive hobbyists, fleet technicians, and custom installers who need a reliable, easy-to-install protective sleeve for wiring harnesses. The MTJSWXSY 20ft x 1/2" braided split loom is aimed at anyone routing cables through engine compartments, off-road vehicles, motorcycles, RVs, or industrial equipment where heat, abrasion, and tidy routing are priorities.

Warranty: The product includes a one-year warranty; if defects appear within 12 months MTJSWXSY will refund and replace the item without a return.