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Small blue bottle of Scotch-Weld TL42 threadlocker, 0.34 fl oz

Scotch-Weld

Scotch-Weld TL42 Blue Medium Threadlocker 0.34 fl oz

SKU CH-7GEF-XHN1P

Medium-strength anaerobic threadlocker in a 0.34 fl oz bottle secures fasteners up to 3/4 in with 70 in-lb breakaway torque

  • Medium-strength hold with 70 in-lb breakaway torque
  • Anaerobic cure locks threads without air exposure
  • Works from -65 °F to 300 °F operating range
  • 20-minute working time allows precise adjustments
  • Fits bolts up to 3/4 in diameter

Medium-strength threadlocker for general maintenance

Scotch-Weld TL42 is a blue, anaerobic liquid designed to lock and seal threaded fasteners up to 3/4 in diameter. It suits mechanics and technicians who need removable assemblies without heat or special tools.

Cures at room temperature with solvent cleanup

The compound reaches handling strength in 20 min and full cure in 1 day between -65 and 300 Degrees F. Viscosity ranges from 800 to 1,600 cps with a flash point of 212 Degrees F for safer shop handling.

Medium strength rated at 70 in-lb breakaway torque

This value determines whether the locker holds your specific bolted joint under vibration while still allowing disassembly with hand tools. Verify the required torque before selecting this grade.

How it compares

Measured against everything we stock in Oils, Greases & Fluids, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 60% of the 337 comparable items (median $22.99).

Specifications

Product
Brand name3M

Questions about this item

How do I apply the Scotch-Weld TL42 threadlocker and what step is often missed?

Clean threads thoroughly, apply several drops to the bolt engagement area, and assemble within the 20 min working time; the step often missed is allowing the full 1 day cure before subjecting the joint to full load.

Will the cured threadlocker need replacement or maintenance over time?

The anaerobic cure creates a permanent bond that does not degrade under normal conditions; replacement is only required if the fastener is removed, which needs heat and hand tools to break the 70 in-lb breakaway torque.

What is the first limit reached when the assembly runs continuously at high temperature?

The maximum operating temperature is 300 Degrees F; sustained exposure above this limit will degrade the dimethacrylate bond and cause loss of locking strength before any other property fails.

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