Overview
The 3M 21TF49 is a professional-grade PTFE joint sealant tape designed for sealing hydraulic and pneumatic connections, pipe threads, and similar applications requiring leak-free performance. With dimensions of 1/2″ × 15 ft (12.7 mm × 4.57 m), this polytetrafluoroethylene (PTFE) tape rolls on dry, provides permanent sealing, and includes a built-in lubricant that allows joints to be opened later without damage.
Key Features
- PTFE (polytetrafluoroethylene) construction for superior chemical and temperature resistance
- Rolls on dry with no mess—no pipe dope or brush required
- Built-in lubricant allows joints to be disassembled without joint degradation
- Compact 15 ft roll (4.57 m) fits standard toolboxes and service kits
- Standard 1/2″ width (12.7 mm) for most common pipe thread sizes
- Temperature stable from -450°F to 500°F (-268°C to 260°C)
Technical Specifications
- Width: 1/2″ (12.7 mm)
- Length: 15 ft (4.57 m)
- Material: Polytetrafluoroethylene (PTFE)
- Temperature Range: -450°F to 500°F (-268°C to 260°C)
- Film Fusion Point: 700°F (374°C)
- Application: Pipe thread sealant and lubricant
- Condition: New in Box
Typical Applications
The 3M 21TF49 PTFE sealant is ideal for:
- Sealing hydraulic and pneumatic system connections
- Pipe thread joints in industrial piping systems
- Mechanical equipment assembly and maintenance
- HVAC system connections requiring leak-proof performance
- Water lines, gas lines, and fuel system connections
- Field maintenance and emergency repair kits
Compatibility & Replacements
Compatible With
- All standard pipe thread sizes (NPT, BSP)
- Hydraulic and pneumatic system components
- Industrial connectors and couplings
- Most metal and plastic pipe materials
- Systems requiring non-hardening, removable joint sealants
Replaces / Drop-In Replacement For
- 3M Scotch® Thread Sealant and Lubricant Tape 48 (similar PTFE sealant option)
- Other generic PTFE thread seal tapes in 1/2″ × 15 ft configuration
Works With
- All standard pipe dope removal solvents
- Both metal and plastic piping systems
- Compression fittings and flange connections
- General mechanical assembly and maintenance workflows
