1. Material & Sealing Mechanism Differences
| Item | PTFE Tape | Pipe Thread Sealant |
|---|---|---|
| Material & Working Principle | Made of PTFE film. It only fills thread gaps physically without adhesion or anti-loosening function. It creeps and shifts under long-term vibration or high temperature, resulting in leakage. Broken tape debris may clog valves. | Liquid adhesive that fully fills all thread clearances. It cures into an elastic sealing layer to lock threads against vibration. No solid debris to block precision pipelines. |
2. Key Performance Comparison
| Performance Aspect | PTFE Tape | Pipe Thread Sealant |
|---|---|---|
| Pressure Resistance | Only suitable for low pressure below 1 MPa | Works for high-pressure hydraulic and pneumatic systems |
| Service Life | Prone to water/gas leakage within 1–2 years | Forms an integrated cured layer with stable service life over 5 years |
| Disassembly | Can be disassembled at any time | Low-strength grades removable with wrenches; high-strength grades require heating for disassembly |
| Medium Resistance | Swells and fails when exposed to oil and organic solvents | Resistant to oil, refrigerant, gas, acid and alkali |
3. Selection Guidelines
| Choose PTFE Tape When | Choose Pipe Thread Sealant When |
|---|---|
| Household low-pressure cold water taps, frequent short-term disassembly, simple civil pipelines at normal temperature without vibration | Industrial oil/gas circuits, high-pressure vibrating equipment, thermal cycling environments, gas/hydraulic pipelines, tiny precision threads, worn old threads |
4. Industry Operation Taboos
- Do not use PTFE tape together with pipe thread sealant.
- Special anaerobic sealants are mandatory for food, drinking water and gas industrial assembly; PTFE tape alone is not recommended.
