18 Gauge Silicone Wire Spool 250 ft Yellow - Ultra Flexible High Temp

In this review of the 18 gauge silicone wire spool, the bottom line is simple: this is a flexible, serviceable wiring option for hobbyists and light industrial use who need soft, heat-resistant conductors. The spool delivers 250 ft of yellow, 18 AWG stranded tinned copper with a very high strand count, and the single biggest reason to buy is its combination of extreme flexibility and wide temperature tolerance, which makes routing and soldering in tight builds far less fiddly than with solid or low-strand wire.

Key Features

• Ultra flexible silicone insulation: The soft silicone rubber jacket makes the wire easy to bend and route into tight spaces without springback or kinking.
• High strand count copper core: With 150 strands of 0.08 mm tinned copper, the conductor stays flexible while providing good current capacity for 18 AWG applications.
• Tinned copper strands: The tin plating helps resist corrosion and makes solder joints cleaner and easier to form.
• Wide temperature range: Rated for high temps to 200 degree C and low temps down to -60 degree C, the insulation performs in extreme environments.
• Long length on a spool: 250 ft of continuous wire gives enough material for multiple projects without frequent restocking.
• 600V rated: The wire is suitable for many household and instrument applications where a 600 volt rating is required.

Who It's For

This spool is ideal for model builders, RC enthusiasts, electricians doing small appliance or instrument wiring, and DIYers who need a very flexible 18 AWG conductor for tight routing or vibration-prone installations. The tinned, high-strand conductor suits repetitive testing, servo leads, motor connections, and lamp or meter wiring where repeated flexing is expected.

Those who should look elsewhere include installers who require solid core wire for push-in terminal compatibility or projects that demand insulated jacket colors beyond what is offered here. Also, if you need wire with thicker insulation diameter for heavy mechanical protection, consider a different construction.

Pros & Cons

Pros

• Exceptional flexibility from the silicone rubber jacket, making routing and neat runs much easier.
• High strand count and tinned copper improve solderability and corrosion resistance.
• Wide temperature tolerance and a 600 volt rating expand use cases into harsh environments.
• Generous 250 ft spool provides good value and reduces the need to buy frequently.

Cons

• Silicone insulation is soft and offers less abrasion protection than thicker jackets, so extra sleeving may be needed in high-wear areas.
• The outside diameter is slim (about 2.3 mm), which may not fit every push-in terminal designed for different insulation sizes.

Specifications

Gauge	18 AWG
Conductor	150 strands of 0.08 mm tinned copper
Insulation	Silicone rubber
Temperature range	-60 degree C to 200 degree C
Rated voltage	600 volts
Outside diameter	2.3 mm (tolerance +/- 0.1 mm)
Length	250 ft spool

Our Verdict

The 18 gauge silicone wire spool is a practical choice for anyone needing a highly flexible, heat-tolerant 18 AWG conductor for models, motors, meters, and small appliances. Given the tinned, high-strand copper core, 600 volt rating, and 250 ft length, it represents strong value for hobbyists and technicians who prioritize flexibility and solderability over heavy mechanical abrasion protection.

Frequently Asked Questions

Is this wire easy to solder?
Yes, the tinned copper strands make soldering straightforward and produce reliable joints for most electronics and hobby wiring.

Can the wire be used outdoors?
The silicone insulation tolerates wide temperature extremes and resists weathering, but in high abrasion or UV-exposed installations additional protective sleeving is recommended.

Will it fit common terminals?
The conductor is standard 18 AWG with an outside diameter of about 2.3 mm; it fits many terminals but check terminal entry size for push-in connectors before installation.