Loctite545 Automotive Pneumatic/Hydraulic Pipe Thread Sealant Purple - High Lubricity, High Pressure, Solvent Resistance - 36 ml, 1 Pack

Used this red thread locker for my big excavator hoses. It sealed the hoses so they don't come undone! No leaks, easy to use and works well! Just make sure you clean the threads well, no oils, use acetone to remove all traces of oil and grease!

I was originally looking for Loctite 542, but found this instead. It is better for my application, which was to repair a tractor hydrolic line. The 542 would be better for water & steam lines. This one works perfectly & is better than teflon tape.

Performance exactly as described

It can be a shock looking in the bottle and thinking about the price you paid, but it's well worth it. I've never had a fitting leak when properly cleaned and this stuff applied.

Fast shipping. Used to seal hydraulic fittings on auto lift.

works fine to seal fittings of my 6 x 4 bandsaw hydraulic downfeed control piston.

Original Review on May 12, 2013:I've used PTFE tape for years and have preferred it to pipe dope ... but this stuff has me sworn off PTFE, forever, in scenarios where the 24 hour cure time is not a factor. Apply it to the threads as a liquid and within 5 mins it begins to set up into a purple, pasty material -- plenty of time to get it threaded into place. Vibration resistance plus sealant in one -- I love it.Addendum Review added on April 29, 2014:Nearly a year later the onboard air system I built for my vehicle still maintains 200psi pressure with not a single leak; it has lots of fittings, and I used the bulk of the bottle on that project. Also, every pneumatic tool I own now has this thread sealant instead of PTFE tape where the industrial nipple is fitted to the tool -- no leaks. I purchased a fixer-upper home last December and needed to replace the hot water heater and pressure tank, and, again this sealant was used to produce fitted connections with zero leakage.I recently used the last of my first bottle when installing an interior (to home) 3/4" threaded ball valve and accompanying outdoor hose bib to bring water from my home to my dock, and I just received the replacement bottle I ordered. I will likely always keep some of this around from now on. A little bit goes a long, long way.I've also learned in using it that while 24 hour cure time is recommended, for non-wet, low pressure (i.e. less than 300 psi) scenarios, you can likely get away with a 15-20 minute wait. I've never waited less than 15-20 mins ... and those times when I waited only that long to use dry things I've sealed, I always had good seals. I'd allow full cure time for wet conditions, just to be safe, but that's me.

Over the years I grew accustom to all of my air equipment having slow leaks. Teflon tape did nothing. After discovering this product, I am never going back. Now, I can fill up my 11 gallon tank, put it in the back of the garage, and use it to top off my tires for like 2 months before it needs to be refilled. Kid you not.