18 Gauge Silicone Wire Spool 500 ft Black - Ultra Flexible High Temp

In this review of the 18 gauge silicone wire spool, the bottom line is simple: this is a workhorse hookup wire for builders and hobbyists who need extreme flexibility and reliable conductivity. The spool offers 500 ft of black, 18 AWG silicone stranded wire with a high strand count and tinned copper that makes soldering and outdoor use easier. It stands out for surviving temperature extremes and fitting into tight spaces, so if you need pliable, durable wire for models, appliances, or motors, this spool delivers.

Key Features

• Ultra flexible silicone insulation: The soft silicone jacket makes the wire easy to route through cramped spaces and reduces fatigue when bending repeatedly.
• High strand count tinned copper: With 150 strands of 0.08 mm tinned copper, the conductor remains supple and easier to solder while resisting corrosion.
• Wide temperature range: Rated to withstand high heat up to 200 degree C and extreme cold down to -60 degree C, so it works in harsh environments.
• 600 V rating: The insulation is rated to 600 volts, suitable for many low-voltage and appliance wiring tasks where safety margin matters.
• Consistent dimensions: The outside diameter is approximately 2.3 mm with +/- 0.1 mm tolerance, helping with fit in connectors and shrink tubing.
• Generous spool length: A full 500 ft spool lets you handle multiple projects without frequent restocking.

Who It's For

This spool is ideal for model builders, robotics hobbyists, technicians, and small appliance repair people who need a flexible, easy-to-handle 18 AWG wire for low-voltage wiring, motor leads, and instrument connections. The tinned strands and silicone jacket make it especially useful where repeated movement or exposure to moisture and cold are factors.

Those who should look elsewhere include installers needing solid-core house wiring or UL-listed building cabling for permanent fixed wiring; this silicone stranded wire is intended for equipment, models, and appliance work rather than in-wall residential wiring runs.

Pros & Cons

Pros

• Exceptional flexibility makes routing and connector work much easier in tight builds.
• Tinned high-strand copper improves solderability and corrosion resistance for outdoor or humid use.
• Wide temperature tolerance and 600 V rating increase versatility across applications.

Cons

• The silicone jacket and stranded construction are not intended for in-wall residential wiring where different codes and solid conductors apply.
• Black color only on this spool may require additional labeling for projects that need color-coded wiring.

Specifications

Conductor	150 strands, 0.08 mm tinned copper
Gauge	18 AWG
Insulation	Silicone rubber
Temperature range	-60 degree C to 200 degree C
Rated voltage	600 volts
Outside diameter	2.3 mm +/- 0.1 mm
Length	500 ft spool

Our Verdict

For anyone building models, repairing appliances, or wiring motors and instruments, this 18 AWG silicone stranded wire is a practical, cost-effective choice because of its flexibility, tinned conductor, and broad temperature rating. It provides strong value when you need durable, easy-to-solder wiring for repeated movement or exposure to harsh conditions.

Frequently Asked Questions

Is this wire suitable for soldering?
Yes. The conductor is tinned copper which eases soldering and helps resist corrosion.

Can it be used outdoors?
Yes, the silicone jacket and tinned strands make it durable for outdoor and harsh conditions, within the voltage and temperature limits.

Is this appropriate for in-wall house wiring?
No. This stranded silicone wire is intended for equipment, hobby, and appliance use, not for permanent in-wall residential wiring which requires specific code-approved cable types.