Excellent Electrical Insulation
Provides stable electrical insulation under high voltage and demanding operating conditions, supporting long-term system reliability.











Sunfilm® Skived PTFE Film Has One Clear Purpose:
Reliable Electrical Insulation, Enhanced Mechanical Protection and Longer Service Life

Provides stable electrical insulation under high voltage and demanding operating conditions, supporting long-term system reliability.
Withstands high electrical stress and helps reduce the risk of dielectric breakdown in critical insulation systems.
The dense, non-porous structure provides excellent dimensional stability, mechanical strength and long-term durability.
Resistant to fuels, lubricants, hydraulic fluids, acids, alkalis and most industrial chemicals.
Excellent abrasion resistance and low friction help protect cables, components and contact surfaces from wear.
Maintains stable mechanical and electrical performance across temperatures from −190°C to +260°C.






| Scope | Typical Value | Unit | Tolerance | Test Standard |
|---|---|---|---|---|
| Material | 100% PTFE | — | — | — |
| Color | Natural | — | — | Visual Inspection |
| Width | 2–100 | mm | ±0.3 | GB/T 6673 |
| Thickness | 0.03–3.0 | mm | ±0.003 (<0.152) ±0.005 (≥0.152) | GB/T 6672 |
| Density | 2.15–2.20 | g/cm³ | ±0.05 | GB/T 1033.1 |
| Tensile Strength | ≥35 | MPa | — | GB/T 1040.3 |
| Elongation at Break | ≥60 | % | — | GB/T 1040.3 |
| Dielectric Constant | 2.1 | — | — | GB/T 1409 / ASTM D150 |
| Dielectric Dissipation Factor (1 MHz) | ≤0.0003* | — | — | GB/T 1409 / ASTM D150 |
| Dielectric Strength | ≥60 | kV/mm | — | GB/T 1408.1 |
| Working Temperature | −190 to +260 | °C | — | GB/T 1409 |
| Chemical Resistance | Excellent | — | — | Inherent PTFE Properties |
| Series | Type | Market | Application | |
|---|---|---|---|---|
| Sunfilm® Skived PTFE Film | Dense Electrical Insulation Film | Global | Electrical insulation, wire and cable protection, semiconductor equipment and industrial protection systems | Learn More |
| Comparison | Conventional Insulation Film | Sunfilm® Skived PTFE Film |
|---|---|---|
| ✖Performance varies by material | ✔Stable and reliable |
| ✖Limited under high electrical stress | ✔≥60 kV/mm |
| ✖Limited wear resistance | ✔Dense and wear-resistant |
| ✖Limited operating range | ✔−190°C to +260°C |
| ✖May degrade in aggressive media | ✔Excellent resistance |
| ✖May age under demanding conditions | ✔Stable and durable |
Reliable Electrical Insulation, Enhanced Mechanical Protection and Longer Cable Service Life.

Because gas systems cannot tolerate any failures. ForeverSeal® GasSafe is designed specifically for gas pipeline applications, not a modification of generic PTFE tape. From material density and thickness to color-coded compliance and controlled manufacturing, every design parameter revolves around one goal: achieving a long-lasting, easily inspectable gas seal.
Explore More
Understand the five main causes of gas pipeline thread seal failure—and how GasSafe solves these problems. Most gas leaks are not caused by installers, but by the use of incorrect tape.
Explore More
ForeverSeal® GasSafe products are widely used in: residential gas pipeline installations, city gas distribution networks, commercial gas appliance connections, LPG and propane system components, and OEM-assembled gas equipment.
Explore MoreTell us your application—gas, water, chemical, oxygen, HVAC, or industrial systems—our engineers will recommend the right PTFE sealing solution based on your media,pressure, temperature, and compliance requirements.
Test performance, discuss custom specs, or get volume pricing—backed by a manufacturer focused on mission-critical applications.
Request SamplesCertified specs, compliance files, and test data—ready for bidding and approval in gas, chemical, and industrial projects.
Get Certified DocumentsCollaborate with a manufacturer built for regulated markets—not commodity products—and build lasting channel value.
Become a Partner