Custom Silicone Cord: 0.5 to 50 mm, Solid and Hollow
Silicone cord extruded to your cross-section, 0.5 to 50 mm, solid or hollow, Shore A 30 to 80. Cut to length or spliced into a loop. Die in 7 to 10 days. No MOQ.
What We Make
- Solid cord, 0.5 to 50 mm, round, square, or rectangular cross-section.
- Hollow cord, the same range.
- Custom profiles.
- Silicone only: standard, high-temperature, food-grade, and medical (platinum-cured) grades.
Spliced Rings
Most cord enquiries are really a seal. We cut cord to length and bond the ends into a loop, so you get a custom o-ring without paying for a mold. This is the economical route when the diameter is large or non-standard, when you need a small quantity, or when you need it fast. There is no mold, only a die, so tooling takes 7 to 10 days.
A spliced ring has one bonded joint. For a high-pressure seal that moves, a molded ring is stronger. Tell us the pressure and the motion and we will say which one fits.
Solid or Hollow
- Solid cord for compression seals that need body and recovery.
- Hollow cord for low-closure-force seals and bulb seals, where the wall has to collapse under light pressure.
We make both. Sponge cord is possible but we run it rarely, so confirm it early if that is what you need.
Tolerance
Cross-section tolerance is ±0.1 mm on small diameters, scaling to ±0.5 mm at 50 mm. We state it because it is the number a seal design depends on.
Materials
We run silicone only. The decision is the grade.
- Standard: -50°C to 200°C continuous.
- High-temperature: for service above 200°C, confirm the grade.
- Food-grade: FDA 21 CFR 177.2600.
- Medical: platinum-cured, USP Class V and VI, ISO 10993 where the application requires it.
Continuous Length
No fixed limit on length. Cord winds onto a disc, and the disc is a fixed size, so a larger cross-section means a shorter length per disc. Give us the diameter and the total length and we will say how it ships.
How It Is Made
We make cord by extrusion, the same as our silicone extrusion line: uncured silicone through a precision die, cured into a fixed profile. No mold, which is why the lead time is short and there is no MOQ.
Specifications
| Cross-section | 0.5 to 50 mm |
| Tolerance | ±0.1 mm small diameters, ±0.5 mm at 50 mm |
| Durometer | 30 to 80 Shore A |
| Forms | solid, hollow (sponge on request) |
| Material | silicone only |
| Length | no limit, wound on discs |
| Splicing | bonded loops (o-rings) |
| Die lead time | 7 to 10 days |
| MOQ | none |
| Certifications | ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 |
Questions we get before the first order
Can you splice cord into o-rings?
Yes. We cut to length and bond the ends into a loop, which is how we make custom-size and large-diameter seals without a mold.
What tolerance do you hold?
±0.1 mm on small diameters, scaling to ±0.5 mm at 50 mm.
Do you make solid and hollow cord?
Both, 0.5 to 50 mm. Sponge cord is possible but we run it rarely, so confirm it early.
What is the minimum order?
No minimum.
How long does tooling take?
The extrusion die takes 7 to 10 days.
What materials do you run?
Silicone only, in standard, high-temperature, food-grade, and medical grades.
Start
Send your drawing, or the dimensions and grade. We confirm cross-section, tolerance, and lead time within 24 hours.