Both are common materials for leak-proof pipe thread connections, and the selection depends on application scenarios: For civil applications featuring low pressure, normal temperature, frequent short-term disassembly and assembly, such as water taps, PTFE tape is recommended. It works perfectly for these scenarios and is low-cost.
For industrial oil circuits, gas circuits, hydraulic systems, high-pressure environments with vibration, applications requiring long-term stable sealing, and complete machine assembly, pipe thread sealant ( SUITIT 186B ) is a reliable solution that delivers both sealing and anti-loosening effects.
Performance Comparison Table: PTFE Tape vs Pipe Thread Sealant
| Comparison Item | PTFE Tape | Anaerobic Pipe Thread Sealant |
|---|---|---|
| Anti-loosening effect | None; threads tend to loosen and leak under vibration | Locks threads firmly after curing, resistant to vibration and impact without loosening |
| Temperature resistance range | Typically -180℃ ~ 260℃; prone to creep and shrinkage leading to leakage at high temperatures | Generally -55℃ ~ 150℃; special grades reach up to 200℃, no shrinkage under high temperature |
| Medium resistance | Resists water, weak acid & alkali; prone to swelling and leakage when exposed to high-pressure oil and organic solvents | Excellent resistance to water, engine oil, diesel, hydraulic oil, refrigerant, acid, alkali and gas, superior penetration resistance |
| Pressure bearing capacity | Suitable for low-pressure pipelines; prone to leakage under long-term pressure over 1.0 MPa | Applicable to high-pressure hydraulic and pneumatic pipelines with stable pressure resistance |
| Gap filling capacity | Only fills tiny gaps; sealing fails on worn threads or defective thread profiles | Good fluidity to fill minor thread wear and thread clearance |
| Disassembly difficulty | Can be disassembled by hand at any time with little residue | Medium-strength grades can be removed with wrenches; high-strength grades form permanent lock and require heating for disassembly |
| Operation limitations | Uneven winding may block valves and small-diameter pipelines; hard to wrap on fine miniature threads | Liquid coating without debris blockage, friendly to fine and micro threads |
| Service life | PTFE film shifts under long-term thermal cycling and vibration, prone to water/gas leakage within 1–2 years | Integrated cured adhesive layer closely fits threads, service life over 5 years |
| Sanitary & food contact scenarios | Ordinary tape contains powder, risk of contamination from falling debris in food pipelines | Food-grade sealants meet drinking water & food contact standards with no shedding fragments |
