3/8 in Flame Retardant Split Wire Loom Tubing - 1800 ft

Our review of this 3/8 in flame retardant split wire loom identifies it as a practical choice for installers who need long runs of durable protective conduit. The biggest reason to buy is straightforward: you get a full 1800 ft of corrugated, split polypropylene tubing that resists heat and abrasion while remaining easy to install around existing harnesses. This review focuses on build quality, temperature performance, and real-world usability for automotive, marine, and industrial wiring protection.

Key Features

• Size and length: The 3/8 in inner diameter and 1800 ft length provide a continuous supply for large projects or repetitive maintenance, eliminating frequent reorders.
• Flame retardant: Built from flame-retardant polypropylene with a V2 UL-94 rating, it reduces ignition risk and slows flame spread in confined installations.
• Temperature range: Rated to operate from -40 F to 275 F, this tubing withstands extreme engine bay and outdoor conditions without becoming brittle or soft.
• Split corrugated design: The longitudinal split and corrugated profile let technicians add or route cables over existing harnesses quickly without full disassembly.
• Protection: The corrugated wall resists abrasion, oils, and vibration, helping wiring harnesses retain shape and avoid chafing in demanding environments.
• Made in Canada: Manufactured in Canada, the tubing demonstrates consistent dimensions and sturdiness compared with common aftermarket alternatives.

Who It's For

This product suits automotive mechanics, marine technicians, and maintenance crews who need reliable, heat-resistant conduit in long lengths for fleet or shop use. It is ideal when bundles must be routed through hot engine compartments or exposed service areas where abrasion and chemical resistance matter.

DIYers with small one-off jobs may find the 1800 ft roll excessive; those who need a non-split, seamless conduit or a different inside diameter should choose a different size or style to match their bundle outside diameter.

Pros & Cons

Pros

• Extensive 1800 ft length reduces reordering for repeated projects and large installations.
• Split, corrugated design speeds installation and maintenance over existing harnesses.
• Durable construction stands up to heat, vibration, and chemical exposure in demanding environments.
• Customers report good shape retention and appearance compared to some aftermarket alternatives.

Cons

• Supplied roll may be more than required for small personal projects, making it bulky to store.
• The 3/8 in inner diameter requires careful measurement of cable bundle OD to ensure a proper fit.

Specifications

Our Verdict

The 3/8 in flame retardant split wire loom is a practical, hardwearing choice for professionals who need long runs of protective tubing that resists heat and abrasion. For fleet maintenance, marine wiring, and industrial harness protection it offers clear value thanks to its temperature rating, V2 flame resistance, and ease of installation; casual users with small needs should consider smaller quantities or alternate diameters.

Frequently Asked Questions

How do I know this size will fit my cables?
Measure the outside diameter of your cable bundle and confirm it is less than the listed inside diameter of 0.341 in to ensure a proper fit.

Can it be used in engine compartments?
Yes, the tubing tolerates high temperatures up to 275 F and resists oils and vibration, making it suitable for engine bay use.

Is the tubing easy to add cables to existing harnesses?
Yes, the split corrugated design allows you to open the loom and add or remove cables without disassembling the entire harness.