Loctite (Henkel)

Threadlocker Blue 242 (removable)

Medium strength · US · not yet reviewed

Short answer

Set / hardened: 10 minutes after application.
Full cure: 1 day after application.
Used for automotive parts and fasteners, load-bearing bonds: elapsed time alone can’t confirm it’s ready. Inspect or test before loading.

Start the clock

When did you apply it?
Outdoors, temperature
Where?
Thickness

Stated times

  • Set / hardened10 minutes
  • Full cure1 day

From Loctite (Henkel) data sheet · checked 2026-10-24. Anything not listed isn’t stated by the manufacturer.

Conditions & fine print
  • Stated conditions: Strength data at 72°F (22°C)
  • Set time is for active metals like steel; less active metals take longer, and two inactive metals (plated, black oxide) need a primer. Cure time depends on temperature, humidity and thickness.
  • Temperature range: 50°F to —°F
  • Region US. Formulas can differ between countries; check your container.
  • Set / hardened: Steel; less active metals take longer
  • Entered from the manufacturer source; second review pending. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Questions

How long before Threadlocker Blue 242 (removable) is set / hardened?

Loctite (Henkel) states: Sets in approximately 10 minutes on active metals (steel); longer for less active metals. Conditions: Steel; less active metals take longer. This is the manufacturer’s stated time, not a guarantee.

How long before Threadlocker Blue 242 (removable) is full cure?

Loctite (Henkel) states: Fully cures in 24 hours; time depends on temperature, humidity and thickness. This is the manufacturer’s stated time, not a guarantee.

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