Designed for Gases
Suitable for natural gas, LPG (propane and butane), and city gas pipelines.
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Home / ForeverSeal GasSafe PTFE Thread Seal Tape
ForeverSeal® GasSafe PTFE Thread Seal Tape
Engineered for Natural Gas, LPG and City Gas SystemsCertified to UL/AGA/DVGW· Designed for Long-Term Zero Leakage
Features
Applications
Technical Parameters
Specifications
Related Downloads
Working Principle
Guide
Features
ForeverSeal® GasSafe PTFE Threadlocker Tape is a high-density or engineered-density PTFE tape designed specifically for gas applications.
ForeverSeal® GasSafe PTFE Threadlocker Tape is a high-density or engineered-density PTFE tape designed specifically for gas applications.
Made from high-purity PTFE resin using a strictly controlled process, GasSafe tape offers superior density and performance, providing a reliable, durable seal for threaded connections in gas pipeline systems. It is designed for natural gas, LPG, and city gas pipeline systems—in which leak prevention is not an option, but critical.Designed for installers, inspectors, and engineers who require certified, reliable, high-performance seals with long-term safety assurance.
High Density and Stability
Optimized PTFE (polytetrafluoroethylene) structure reduces cold flow and improves long-term reliability of threaded seals.
Wide Compatibility
Compatible with steel, brass, stainless steel, composites, and other certified gas pipeline materials.
Yellow Coding
Easy identification of gas-grade tape for compliance and inspection.
No Harmful Additives
Oil-free, silicone-free, and non-toxic formulation.
Ready to Use
No curing or drying time required; seals immediately after installation.
Wide Temperature Range
Reliable operation even in extreme operating environments.
Unlimited Shelf Life
Stable PTFE composition allows for long-term storage without degradation.
Application Areas
ForeverSeal® GasSafe is designed for natural gas, liquefied petroleum gas, and city gas pipeline systems where leaks, cold flows, and material degradation are unacceptable.
Gas stove installation
Water heater connection
City gas pipeline
liquefied natural gas station
Commercial kitchen gas system
*Not recommended for use in oxygen pipelines or pure oxygen environments. In these cases, please use suitable oxygen-resistant tape.
Technical Parameters
| Scope |  GasSafe (GS) |  GasSafe Pro (GSP) |
|---|---|---|
| Material | Minimum 99% PTFE, maximum 1% colorant | Minimum 99% PTFE, maximum 1% colorant |
| Color | Yellow (gas code) | Yellow (gas code) |
| Lubricant | None | None |
| Width | 12mm (1/2''), 19mm (3/4''), 25mm (1'') | 12mm (1/2''), 19mm (3/4''), 25mm (1'') |
| Thickness | 0.10 mm ±0.01 | 0.10 mm ±0.01 |
| Density | 1.0 g/cm³ ±0.1 | 1.3~1.5 g/cm3 |
| Tensile Strength | 10-17 MPa | 10-17 MPa |
| Elongation | ≥50% | ≥50% |
| Maximum Working Pressure | ≤2.0 MPa | ≤2.0 MPa |
| Temperature Range | -190℃ to +260℃ | -190℃ to +260℃ |
| Gas Compatibility | Natural gas, liquefied petroleum gas (LPG), biogas | Natural gas, liquefied petroleum gas (LPG), biogas |
| Certifications | UL, AGA, DVGW | UL, AGA, DVGW |
| Explore GasSafe | Explore GasSafe Pro |
Specifications
| Series | Model | Market | Application | Width (W) | Thickness (T) | Density (D) | Length (L) | |
|---|---|---|---|---|---|---|---|---|
| GasSafe | GS-W12-T10-D10 | Americas | Residential and Light Commercial Gas | 12mm | 0.10 mm | 1.0g/cm3 | 260 inches (6.6 meters) | Learn More |
| GasSafe | GS-W12-T10-D10 | Americas | Residential and Light Commercial Gas | 12mm | 0.10 mm | 1.0g/cm3 | 520 inches (13.2 meters) | Learn More |
| GasSafe | GS-W12-T10-D10 | Europe/Southeast Asia | Residential and Light Commercial Gas | 12mm | 0.10 mm | 1.0g/cm3 | 10 meters | Learn More |
| GasSafe Pro | GSP-W12-T10-D15 | Americas | City Gas and Commercial Gas | 12mm | 0.10 mm | 1.3~1.5g/cm3 | 1429 inches (36.3 meters) | Learn More |
| GasSafe Pro | GSP-W19-T10-D15 | Americas | Large Pipeline and Industrial Gas | 19mm | 0.10 mm | 1.3~1.5g/cm3 | 1429 inches (36.3 meters) | Learn More |
| GasSafe Pro | GSP-W12-T10-D15 | Europe/Southeast Asia | City Gas and Commercial Gas | 12mm | 0.10 mm | 1.3~1.5g/cm3 | 10 meters | Learn More |
Why GasSafe ≠ Regular PTFE
GasSafe is more than just “thicker tape” – it is specially designed to exhibit different properties under gas pressure.
| Comparison Projects | Ordinary PTFE Tape | ForeverSeal® GasSafe |
|---|---|---|
| ✖Low density, easily squeezed out and thinned. | ✔High density, long-term structural stability |
| ✖Easily loosened after vibration. | ✔Enhanced friction retention |
| ✖Large batch variation. | ✔Engineering-grade tolerance control |
| ✖Yellow = Gas-specific | ✔Engineering-grade tolerance control |
| ✖High | ✔Low |
Most gas leaks are not caused by installers, but by the use of incorrect sealing materials.
Long-Term Sealing Stability
GasSafe conducts the following tests to ensure that sealing performance does not degrade over time; these points are crucial for gas systems designed to operate without maintenance for 10-20 years.
- Cold Flow Resistance
- Gas Tightness Over Time
- Anti-vibration and Mechanical Stability
- Thermal Cycling Stability
- Anti-corrosion and Anti-aging Ability
Related Downloads
QB/T4008-2022 "Unsintered PTFE Thread Seal Tape (Raw Material Tape) for Thread Seals"ForeverSeal® GasSafe PTFE Thread Seal Tape Technical SpecificationsMaterial Safety Data Sheet (MSDS/SDS)Methane Leakage DataAging and Creep TestsProduct Certifications (UL, AGA, DVGW)PTFE Thread Seal Tape for Gas Use User ManualE-Catalogue
Working Principle
ForeverSeal® GasSafe creates a tight mechanical seal at threaded gas connections.
When used correctly—starting from the root of the thread and maintaining a steady tension—the specially formulated polytetrafluoroethylene (PTFE) expands to fill tiny gaps, creating a leak-proof connection between the male and female threads.
Installation Steps:
- 01
- Clean the threads.
- 02
- Wind clockwise (tightening direction).
- 03
- Begin winding from the second turn.
- 04
- Tighten and overlap the winding as needed; the number of turns depends on the diameter (see specification guide).
- 05
- Compact the winding.
- 06
- Install immediately and tighten.
- 07
- Perform a leak test (required for gas systems).
Whether you're a professional contractor or an industrial user, you choose ForeverSeal® because it performs reliably, predictably, and is acceptable in critical systems.
In gas systems, a single failure can mean accidents, claims, and downtime costs.
Every ForeverSeal® product is meticulously crafted to the highest quality and performance standards.
Frequently Asked Questions
- Do you have UL for the Teflon Tape？
- Do you have RoHS for the Teflon Tape
- Do you have CE for the Teflon Tape?
- Where is Hangzhou Forever Plastics Co.,Ltd located in?
- How about your Service?
Guide
Why choose ForeverSeal® GasSafe?
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
Five Causes and Countermeasures for Gas Pipeline Seal Failure
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
Learn About xxx's Case Studies
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 MoreGet a GasSafe Quote and Technical Support
From samples to projects, from technology to delivery
Gas systems cannot tolerate any uncertainty.
Please tell us your application scenario—we will recommend the appropriate GasSafe solution for you.
Contact us and you will receive:
- GasSafe Technical Specifications
- Your market price list (distributors/OEMs/projects)
- Sample availability
- Delivery time and minimum order quantity
- Engineering support (if needed)
- Manufacturing
- Name
- *Phone
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From Evaluation to Long-Term Supply
Whether you're conducting material qualification, developing OEM configurations,or preparing for bulk purchases, ForeverSeal® supports your projects with consistent quality, engineering control, and reliable supply.
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Test performance, discuss custom specs, or get volume pricing—backed by a manufacturer focused on mission-critical applications.
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Engineered Like a Soldier. Tested Like a Guardian.
Solution
PTFE Tapes