Expanded PTFE Sealing Cord (100% ePTFE Joint Sealant Cord)
Manufactured from 100% pure expanded PTFE resin via a proprietary multi-directional expansion process, our PTFE sealing cord is a soft, highly conformable sealing solution. Designed for instant, cut-to-length flange sealing without pre-stamping scrap, it provides zero-creep joint sealing across extreme temperatures and harsh chemical environments.
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100% Pure ePTFE & Instant On-Site Joint Sealing
Expanded PTFE Sealing Cord (100% ePTFE Joint Sealant Cord)
Hebei Xinda introduces its latest expanded fluoropolymer innovation: the high-performance ptfe sealing cord. Engineered as an essential member of our expanded PTFE products line, this versatile joint sealant cord is produced from 100% virgin PTFE through a specialized multi-axial expansion process. The resulting micro-porous, highly flexible fibrous cord easily conforms to damaged, uneven, or complex flange faces under minimal bolt torque, forming an instant, long-lasting seal that effectively eliminates cold flow and creep relaxation in severe industrial service.
Cut-to-length spool supply allows technicians to wrap round or irregular flange perimeters directly without off-cut sheet waste.
Soft micro-porous structure compresses thin under low clamp loads, sealing surface scratches on glass-lined, plastic, or worn steel joint faces.
Chemically inert to virtually all industrial acids, alkalis, steam, and organic solvents without hardening or aging over years of service.
Expanded PTFE Sealing Cord Technical Specifications
| Property Parameter | Test Unit / Format | Standard Production Value |
|---|---|---|
| Base Material Composition | % | 100% Virgin Expanded PTFE (ePTFE) |
| Available Cord Diameters / Cross-Sections | mm | Round: Ø 1.0mm up to Ø 6.0mm / Custom Oval Profiles |
| Operating Temperature Range | °C | -240 °C to +260 °C (Short-term spikes to +315 °C) |
| Operating Pressure Resistance | bar / MPa | Vacuum up to 200 bar (20 MPa) depending on joint design |
| Length | m | 10m / 15m |
| PH. | 0-14 |
Discover our full range of Expanded PTFE Gasket Materials >> for full-face flange cut gaskets.
Key Operational Advantages
- Instant Installation & Minimal Downtime: Simply unspool the cord, press it onto the flange face (using optional adhesive backing), overlap the ends, and bolt down. No die-cutting lead times or CAD mapping required.
- Universal Inventory Consolidation: A single spool of PTFE sealing cord can replace dozens of pre-cut gasket sizes in your maintenance warehouse, drastically cutting inventory carrying costs.
- High Pressure & Cryogenic Stability: Resists blowout under severe system thermal shock and pressure cycles from sub-zero liquid gases up to hot acid lines.
Typical Industrial Applications
Ideal for oversized chemical reactors, heat exchanger end-covers, and storage tank manways where sheet gaskets are too costly.
Protects glass-lined piping, ceramic housings, and FRP vessels by forming a low-torque, leak-free seal.
Fast sealing for split-case pump housings, turbine casings, and gearbox covers during emergency plant overhauls.
Flexible sealing element for high-pressure control valve bonnets and chemical process sight glasses.
