Happy with it overall. Took a bit longer to arrive than I'd like.
Sarah T.
✓ Facilities Manager
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The Loctite LOC135486 is Loctite 545 thread sealant for hydraulic and pneumatic fittings, 50 ml bottle / 1.69 oz.
The hydraulic and pneumatic designation is the specification and it points at the reason this product exists rather than PTFE tape.
PTFE tape works, and it has a failure mode that matters enormously in a fluid system: it shreds. Wrapping a fitting produces tape fragments, and those fragments go downstream into the system — into valve seats, orifices, servo spools, and pilot passages, where a piece of tape the size of a grain of rice causes a fault that takes a day to find. Anyone who has torn down a hydraulic valve and found tape in it does not use tape again.
A liquid anaerobic sealant has nothing to shred. It cures in the thread and stays there.
545 is low strength by design, which is correct for a sealant rather than a locker — fittings need to come apart, and they need to be adjustable for orientation during assembly.
The cure is anaerobic: liquid in contact with air, solid when air is excluded and metal ions are present. That is why the bottle does not set.
Applications include hydraulic systems, pneumatics, fine-thread fittings, and instrumentation.
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Happy with it overall. Took a bit longer to arrive than I'd like.
Sarah T.
✓ Facilities Manager
Exactly what I needed and it works flawlessly. Would buy again without hesitation.
Olivia V.
✓ Verified Buyer
Top quality — feels well built and performs even better than I expected.
Carlos Z.
✓ Verified Buyer
Arrived damaged and did not perform as described.
Michael T.
✓ Business Owner
Good product. Would have given five stars but the finish had a small mark.
Melissa L.
✓ HVAC Technician
Perfect fit and finish. You can tell it's a quality part.
Marcus M.
✓ Contractor
Did not work for my application. Had to return it.
Marcus A.
✓ HVAC Technician
Poor quality — stopped working within a couple of weeks.
Linda Q.
✓ Verified Buyer
Reliable and does what it should. Shipping was a touch slow.
Nancy U.
✓ Verified Buyer
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