1 sq mm Silicone Rubber Insulated Flexible Wire
1 sq mm (≈ 18 AWG) silicone wire is a soft, very flexible high-temperature wire used for control, signal and appliance lead wire. Silicone rubber stays elastic from −60°C up to 200°C continuous, and up to 250°C in special constructions with a fiberglass outer layer or SS armour.
Our 1 sq mm construction uses 32 strands of 0.2 mm copper, bunched to about 1.3 mm diameter, with a 0.6 mm silicone wall and a finished outer diameter of about 2.5 mm. These values come from our factory datasheet; maximum conductor resistance is 19.5 Ω/km at 20°C.
The fine stranding is what makes silicone wire so flexible. It bends easily around tight panel corners and moving parts, and it does not harden with heat the way PVC does. That is why it is common in ovens, heaters, lighting fixtures, motors and battery or power connections that see heat and movement.
At 1 sq mm we recommend about 21 A as a safe continuous current, with 23 A as the maximum under good cooling. Conductors are available in tinned copper (standard), bare copper, silver-plated copper and nickel-plated copper, in a full range of colours.
Choosing the right size: This is the smallest size in this range; for even finer wire, ask us about special constructions. If the current is near the limit, or the wire runs in a hot bundle, step up to 4 sq mm Silicone Wire for extra margin. Under-sizing a high-temperature wire makes it run hotter, which shortens insulation life, so it is better to choose by current and ambient temperature together.
1 sq mm Silicone silicone wire is supplied on coils or drums in red, black, white, yellow, blue, green and other colours, in single core or multicore. For a quote, tell us the conductor, colour, core count, total length and whether you need a fiberglass outer layer or SS armour for higher temperature.
Every batch is made at our Rewari factory and ships with a Material Test Certificate. Use the silicone configurator to pick size, conductor, colour and length and get a technical data sheet, or send us your requirement on WhatsApp.
Specifications
| Nominal size | 1 sq mm (≈ 18 AWG) |
|---|---|
| Stranding | 32 × 0.2 mm |
| Bunched conductor diameter | ≈ 1.3 mm |
| Max conductor resistance | 19.5 Ω/km at 20°C |
| Insulation thickness | 0.6 mm silicone rubber |
| Overall diameter | ≈ 2.5 mm |
| Safe / max current | 21 A / 23 A |
| Temperature rating | −60°C to +200°C; 250°C special constructions |
| Conductor options | Tinned Cu, Bare Cu, SPC, NPC |
| Documents | Batch MTC; TDS from the configurator |
Typical values. Your TDS and batch MTC are the binding documents.
Typical applications
- Oven and appliance internal wiring
- Heater and thermostat leads
- Control panel hot-zone wiring
Frequently asked questions
What is the outer diameter of 1 sq mm silicone wire?
About 2.5 mm with a 0.6 mm silicone wall, per our factory datasheet.
What current can 1 sq mm silicone wire carry?
About 21 A safe continuous and 23 A maximum with good cooling. High ambient or bundling lowers this.
What temperature is silicone wire rated for?
−60°C to 200°C continuous as standard; up to 250°C with a fiberglass outer layer or SS armour.
Is silicone wire better than PVC for heaters?
Yes. PVC softens around 85–105°C, while silicone stays flexible up to 200°C and does not harden with heat.