US Part Number: 56521
Canada Part Number: 56550

Permatex® High Performance Thread Sealant


OEM specified. Formulated specifically for metal, tapered pipe thread fittings, it replaces Teflon® tape and pipe dopes. Cures rapidly to withstand up to 10,000 PSI. Prevents galling and protects mated threaded areas from rust and corrosion. Contains PTFE.



Suggested Applications: Stainless steel fittings, head bolts into through holes, oil PSI sending units/sensors, oil and coolant lines, intake manifold switches, rear axle fill plug, and fuel fittings.


Suggested Applications: Timing hole plug, oil hose fitting

Heavy Duty

Suggested Applications: Drain plugs, all tapered fittings

US Item # CDN Item # Container Size Case
565215655050 ml tube, carded 6
US Item # Tech Doc File
56521 TDS  SDS  


  1. For best results, clean parts with Permatex® Surface Prep™ activator.
  2. Knead tube of Thread Sealant before use.
  3. Apply sealant to leading threads of the male fitting, leaving the first thread free of sealant. Apply to only _?_of a thread turn. It is not necessary to apply to all threads.
  4. Assemble parts and tighten to recommended torque. Refer to Technical Data Sheet for complete information.

NOTE: Permatex® Thread Sealant seals threaded metal fittings on hydraulic, pneumatic, fuel, and cooling systems. It is not recommended for plastics or rubber.

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