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5 reasons why LOCTITE 243 is a “must-have”

Loctite 243 is a general-purpose medium strength threadlocker. Loctite 243 secures and seal bolts, nuts and studs to prevent loosening due to vibration. The product works on all metals, including passive substrates such as stainless steel, aluminium and plated surfaces. It is proven to be tolerant of minor contamination due to industrial oils, e.g., engine oils, corrosion prevention oils and cutting fluids.  

"Did you know: LOCTITE 243 will be suitable for the vast majority of standard threadlocking application. You are unlikely to need another grade very often."

Reason 1 - Strengthens threaded assemblies against vibration by adding approx. 25% to the torque needed to loosen a normally tightened bolt assembly. 

Reason 2 - One product for locking various sized fasteners, versus an inventory of different sized mechanical locking devices you would otherwise need to keep (saves both money and space). 

Reason 3 - It’s suitable for active and inactive substrates. Do note though that activator LOCTITE SF 7649 is needed on inactive surfaces. 

Reason 4 - It’s tolerant to minor oil contamination, curing on as-received fasteners without cleaning, or on parts that aren’t easily accessible for thorough cleaning during maintenance. 

Reason 5 - Assemblies locked by LOCTITE 243 can be easily disassembled when needed, using ordinary hand tools.