PTFE Tape vs. Thread Sealing Cord: Choosing the Right Thread Sealing Solution
In plumbing, heating, and industrial installations, sealing threaded connections effectively is critical for safety and performance. While PTFE thread seal tape (commonly known as plumber's tape) has been an industry standard for decades, thread sealing cord is gaining popularity as a modern, reliable alternative. But what are the key differences-and which should you choose?
What Is PTFE Tape?
PTFE (polytetrafluoroethylene) tape is a thin, white film used to wrap male pipe threads before assembly. It's known for its ease of use and compatibility with water, air, and many chemical systems.
Advantages:
Simple and fast application – Just wrap around the threads.
Clean and non-hardening – No curing time, easy disassembly.
Widely available and cost-effective.
Limitations:
Risk of incorrect wrapping – Can lead to leaks if not applied properly.
Not ideal for high-vibration or high-pressure systems.
Tape can tear or bunch during installation.
What Is Thread Sealing Cord?
Thread sealing cord is a modern sealing solution, typically made from high-strength PTFE fibers. Brands like Loctite® 55 have popularized this format, especially in Europe. The cord is wound into the thread grooves, creating a tight, secure seal.
Advantages:
Excellent sealing on metal and plastic threads.
Ideal for large-diameter fittings and irregular thread profiles.
Resists vibration and pressure – More reliable in demanding applications.
No drying or curing time required.
Limitations:
Slightly longer installation time compared to tape.
Requires correct winding technique for best results.
Higher cost per unit than PTFE tape.
PTFE Tape or Sealing Cord – Which to Choose?
| Feature | PTFE Tape | Thread Sealing Cord |
|---|---|---|
| Application Speed | Faster | Slightly Slower |
| Sealing Reliability | Moderate | High |
| Vibration Resistance | Low | Excellent |
| Ideal for Large Threads | Not Recommended | Highly Suitable |
| Reusability / Adjustment | Easy | Easy |
Industry Trend: Cord Gaining Ground
As systems become more demanding and as professional installers seek more dependable results, thread sealing cords are becoming increasingly popular-especially in Europe and high-end applications. While PTFE tape remains a cost-effective and reliable choice for many day-to-day uses, thread sealing cord is an excellent upgrade where performance matters most.
At Foreverseal, we supply high-quality PTFE tape and are expanding our range to include professional-grade thread sealing cords. Contact us to learn more about OEM partnerships and custom branding options.
