Permatex High Performance Thread Sealant 56521 is a professional-grade thread sealing compound formulated specifically for metal tapered pipe threads and fittings. Designed to replace traditional PTFE tape and pipe dope, it creates a durable, leak-resistant seal that withstands vibration, temperature cycling, and extreme pressures up to 10,000 PSI. The PTFE-enhanced formula lubricates threads during assembly, helps prevent galling, and protects against rust and corrosion while still allowing future disassembly with standard hand tools. It is commonly used on hydraulic, pneumatic, fuel, oil, coolant, and industrial piping systems.

Key Features

- Fast-curing formula for metal threaded fittings
- Withstands pressures up to 10,000 PSI
- Contains PTFE for improved sealing and thread lubrication
- Prevents leakage caused by vibration and thermal cycling
- Protects threads from corrosion and galling
- Allows repositioning during assembly and later disassembly when needed
- Suitable for oil, fuel, hydraulic, pneumatic, and coolant systems
- 50 mL (1.69 oz) squeeze tube, white paste formulation 

Typical Applications

- Stainless steel pipe fittings
- Oil pressure sending units and sensors
- Fuel system fittings
- Oil and coolant lines
- Intake manifold switches
- Rear axle fill plugs
- Industrial process piping and equipment