Loctite 542 is different from the 510 – 515 – 518 series (flange sealing). This is a thread sealant specialized for high-pressure hydraulic and pneumatic threads.
Information about Loctite 542:
Form: Liquid glue, reddish brown.
Main application: Sealing metal threads in hydraulic systems, pneumatic systems, oil, water, gas pipes.
Outstanding features:
For small and medium-sized threads (under M80, commonly used M10 – M26).
Heat resistance from –55°C to +150°C.
High pressure resistance, up to 350 bar (in hydraulic systems).
Prevents leakage of oil, compressed air, solvents, fuel.
Initial setting time: ~20 minutes on steel, longer on stainless steel or aluminum.
It is an anaerobic glue, only dries when in the thread (anaerobic environment).
Practical applications:
Seal threads in hydraulic and pneumatic systems.
Oil pipes, fuel pipes, compressed air pipes in machinery.
Threaded joints in industrial machines, mechanical equipment, high pressure pipes.
👉 Summary: Loctite 542 is specialized in sealing threads in high pressure hydraulics – pneumatics, while types 510, 515, 518 are for sealing flanges.
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