Permatex® 27100 High Strength Threadlocker RED, 6 ml


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SKU: 10077526
MFG: 27100


Permatex® High Strength Threadlocker RED is a high strength anaerobic threadlocking material that cures between engaged threads to form a unitized assembly that resists virtually all leakage, shock and vibration. The product is a single component, anaerobic liquid which cures when confined in the absence of air between close fitting metal surfaces. Ideal for all 3/8" to 1" diameter nut and bolt assemblies where future disassembly is improbable. Excellent chemical resistance with a temperature resistance range of -54 degree Celsius to 150 degree Celsius (-65 degree Fahrenheit to 300 degree Fahrenheit).

  • Size: 6 ml
  • OEM specified
  • High strength
  • For heavy-duty applications 3/8" to 1" (10 mm to 25 mm)
  • Especially well-suited for permanently locking studs and press fits
  • Adds 3,000 PSI holding power on slip and press fit assemblies
  • Replaces set screws and snap rings
  • Locks against vibration loosening
  • May require heat or special tools for removal
  • Conforms to ASTM D5363 AN0221 (Mil-S- 46163A, Type I, Grade K)
  • Tube
  • Carded.

Suggested Applications:


  • Cylinder block and rocker arm studs, ring gear bolts, frame bolts, shock absorber bolts.


  • All engine mounting bolts.


  • Cylinder block studs, ring gear bolts, frame bolts, shock bolts.

Heavy Duty

  • Air starter fasteners, suspension fasteners, shock absorber mounts, wheel studs, exhaust system mounts, bumper fasteners.


  • Improved Reliability
  • Eliminates vibration issues
  • Seals against leakage
  • Prevents rusting of threads
  • Cures without cracking or shrinking.

Easy Application:

  • No mixing
  • No curing outside of joint
  • No torque compensation required during assembly.

Typical Applications:

Prevents loosening and leakage of threaded fasteners. Particularly suitable for applications such as:

  • Cylinder block
  • Rocker arm studs
  • Ring gear bolts
  • Fan hub bolts
  • Frame bolts
  • Shock absorber bolts.

Directions For Use:

For Assembly

  • Clean all threads (Bolt and Hole) with a cleaning solvent such as Permatex® Brake and Parts Cleaner and allow to dry.
  • Determine if the threads to be bonded are Active or Inactive Metals. If material is an Inactive Metal, spray all threads with Permatex® Surface Prep (24163) and allow 30 seconds to dry. Priming is not required if the material is an Active Metal. If unknown, it is always best to use the primer.
  • Shake the product thoroughly before use.
  • For Thru Holes, apply several drops of product onto the bolt at the nut engagement area.
  • For Blind Holes, apply several drops down female threads into the bottom of the hole. As threads are engaged, compressed air forces the product upwards into the threads.
  • Assemble and tighten as usual. When tightening to established torque values, torque compensation is not required.

For Cleanup

  • Residual liquid films and/or fillets outside the joint are readily soluble in Permatex® Brake and Parts Cleaner.
  • Cured product can be removed with a combination of soaking in Permatex® Gasket Remover and mechanical abrasion such as a wire brush.

For Disassembly

  • Apply localized heat to nut or bolt to approximately 260 degree Celsius (500 degree Fahrenheit). Disassemble while hot.

For Reassembly

  • Remove loose product from nut and bolt.
  • Apply primer to all threads, regardless of metal type.
  • Assemble and tighten as usual.

Properties of Uncured Material:

  • Chemical Type: Anaerobic Dimethacrylate Ester
  • Appearance: Opaque Red Fluorescent Liquid
  • Specific Gravity, g/ml: 1.10
  • Viscosity @ 25 degree Celsius, mPas (cP): 400 to 600
  • Flash Point (TCC), degree Celsius (degree Fahrenheit): >93 (>200)
WARNING: This product can expose you to chemicals including Cumene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to