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Loctite Thread Sealant 545 - Purple - Non-Contaminating Thread and Pipe Sealer - 1.22-Fl Oz Bottle

Loctite Thread Sealant 545 - Purple - Non-Contaminating Thread and Pipe Sealer - 1.22-Fl Oz Bottle

Item # LT37482
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Tools LT37482 - 1.22 Oz - Loctite
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This purple thread sealant is specially formulated not to contaminate fluids or gases when used to seal threaded components and pipe fittings on pressurized pneumatic and hydraulic systems. Prevents leakage of air, oil and automotive fluids. Lowest Prices for the best tools from Loctite. Loctite Thread Sealant 545 - Purple - Non-Contaminating Thread and Pipe Sealer - 1.22-Fl Oz Bottle part number LT37482 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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  • Reviews (1)
  • Q & A (19)
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Loctite Tools - LT37482

  • Adhesives and Sealants
  • Multi-Purpose Sealant
  • Loctite
  • 1.22 Oz

This purple thread sealant is specially formulated not to contaminate fluids or gases when used to seal threaded components and pipe fittings on pressurized pneumatic and hydraulic systems. Prevents leakage of air, oil and automotive fluids.


Features:

  • Formulated especially for hydraulic and pneumatic systems - won't contaminate lines or fluids
  • Seals low- and high-pressure applications - prevents leakage of gases and fluids around threaded and pipe fittings
    • Works better than thread seal tape
  • Cures on oil-contaminated surfaces
  • Prevents treated parts from corroding
  • Allows for easy disassembly of cured parts with hand tools
  • Made in the USA


Specs:

  • Application: all sizes of threaded assemblies
  • Quantity: 1.22-fl oz bottle (36 mL)
  • Low-pressure (500 psi) cure: 10 minutes
  • Full cure (time required to reach full set): 24 hours
  • Maximum operating pressure: 10,000 psi


Applications: Brake, transmission cooler, fuel, hydraulic and PTO lines and assemblies.



The shaded areas in these diagrams illustrate where thread sealant is applied in a variety of assemblies:



diagram of threadsealer in use

diagram of threadsealer in use

diagram of threadsealer in use

diagram of threadsealer in use

diagram of threadsealer in use


Thread Sealant 545 contains no ingredients that can enter and harm systems. Applied as a liquid to the threads of nuts, bolts and mating surfaces of fittings before assembly, this specially formulated substance keeps parts sealed, even when vibration occurs and temperature changes. The sealant also prevents rust or other corrosion from forming. Nuts and bolts that aren't corroded last longer and can be taken apart more easily. Standard hand tools can break the seal of the sealant, allowing you to remove treated nuts and bolts, which then can be reused.


This thread sealant is anaerobic (hardens in the absence of air) and requires contact with an active metal to cure. Active metals (those that tarnish, corrode or rust) include brass, copper, bronze, iron, soft steel and nickel. If both parts to be joined are made of inactive materials, Loctite Klean 'N Prime primer must be applied to one of the surfaces for curing to occur. Inactive materials include plated parts, stainless steel, galvanized steel, magnetite steel, pure aluminum, titanium, magnesium, gold, silver, plastic, cadmium, Iconel, zinc, natural or chemical black oxide and anodized aluminum.


Klean 'N Prime can speed the cure rate of Thread Sealant 545. This is especially helpful when you are applying the sealant to any material, active or inactive, in colder temperatures (below 70 F).



Note: Thread Sealant PST Stick is not for exhaust sensors. An anti-seize compound is recommended for exhaust sensors. Thread Sealant PST Stick can corrode some synthetic rubber tubing.



OEM symbol

This product is OEM specified: It is approved to meet specifications of original equipment manufacturers.



492145 Loctite Thread Sealant 545 - Pneumatic/Hydraulic

Alternate part number: 37482

Installation Details LT37482 Installation instructions


California residents: click here



Customer Reviews

Loctite Thread Sealant 545 - Purple - Non-Contaminating Thread and Pipe Sealer - 1.22-Fl Oz Bottle - LT37482

Average Customer Rating:  5.0 out of 5 stars   (1 Customer Reviews)

This purple thread sealant is specially formulated not to contaminate fluids or gases when used to seal threaded components and pipe fittings on pressurized pneumatic and hydraulic systems. Prevents leakage of air, oil and automotive fluids.

- LT37482
by:

Very satisfied the loctite work as expe cted 454638


1
1

Ask the Experts about this Loctite Tools

  • Should Threads of Aluminum Propane Regulator be Sealed with Tape or Sealant
    Yes, you will want to use some sort of thread sealer like part # LT37482 or pipe tape like part # A05-0265 on the NPT fittings inside of the aluminum propane regulator. As a general rule, all NPT fittings should have some sort of thread sealer or pipe tape on them.
    view full answer...
  • Can Loctite Thread Sealant 545 be Used with Potable Water Systems
    Loctite Thread Sealant 545 # LT37482 is not designed for potable water systems and should not be used. There are chemicals in it that can be harmful if ingested. If joining copper pipes I recommend using solder to join non-threaded pieces and thread seal tape such as # A05-0265 on the threads of threaded pieces. Plumbers dope can be used on the plastic PVC-like pipes; available at hardware stores. If the PVC pipes are not threaded you should use primer and the appropriate adhesive for joining...
    view full answer...
  • How to Fix a Leaky Pipe Under a Bathroom Sink
    If the pipe you are referring to has a threaded connection then you will need to remove the fitting, clean the threads, apply a sealant like part # LT37482 or part # A05-0265, and then retorque the fitting as needed. If the pipe you are referring to is made of PVC then you will want to remove it, clean where it slides into the coupler, and then again apply sealant like part # LT37467 before attaching it to the coupler. You will want to allow time for each of the compounds to dry before...
    view full answer...
  • Is Teflon Tape Needed To Seal the Propane Regulator
    Yes, you will want to use some sort of thread sealer like part # LT37482 or pipe tape like part # A05-0265 on the NPT fittings inside of the MB Sturgis Single Stage Propane Regulator part # 108072. As a general rule, all NPT fittings should have some sort of thread sealer or pipe tape on them. Not to confuse you but some supply hoses (propane tank to regulator) like part # 100833-12 come with an inverted flare fitting and if that is the case then you would also need part # 402258-MBS...
    view full answer...
  • Recommended Parts for Propane Quick Connection with Grill or Other Accessory
    The Camco Quick-Connect to Quick-Connect Propane Hose - 3' Long # CAM57280 will be all you need to connect a grill or other appliance that has the quick connect feature. If you don't have that feature and want to add it to a grill or appliance, you simply need the Camco Quick-Connect Full Flow Plug for Low Pressure Propane Systems # CAM59903 along with some sealant like # LT37482.
    view full answer...
  • Recommended 1/4 Male Pipe Thread to Quick Connect for Grill
    The MB Sturgis Dual Quick Disconnect Propane Hose for Small Appliance - 10' # 100395-120-MBS you referred to has the male and female quick disconnects for a grill. It sounds like you also want the MB Sturgis Quick Disconnect Propane Adapter Fitting - Male Model 250 x 1/4" MPT # 401132-MBS to attach to your grill. You will want to use a pipe thread sealant like # LT37482 for the threaded connection. If you want the female quick connect, you will want the Camco Quick-Connect Kit # CAM59853...
    view full answer...
  • Air Ride Fittings, Gauges, And Valve Replacement Help
    The Air Lift Single Needle Gauge Panel with One Paddle Switch part # AL26161 can be used if you only want to use one valve to control both air bags. Since you currently have 2 valves controlling the air bags, you will need to "T" the lines coming from both air bags into one line, using the Air Lift Union T-Piece for 1/4" Air Lines part # AL21838. We do sell replacement air fittings if you would like to replace yours. However, I would need to know the NPT fitting size used on the back...
    view full answer...
  • Trouble Preventing Brass Brake Line Fittings From Leaking On a Trailer
    The majority of our brake line fittings are made from brass which are a bit different than the steel brake line fittings you might be familiar with on a passenger vehicle. Generally speaking, the cause of these brass brake line fittings leaking is usually related to over-tightening as they are just not designed to be torqued to the same specification as the steel brake line fittings. I recommend you start by tightening the fittings by hand tight, then around 2-3 full rotations with a wrench....
    view full answer...
  • Installation Location of Engine Block Heater on 2016 Nissan NV2500 with the 5.6L V8
    The Kat's Heaters Custom Engine Block Heater # KH11412 will install in the front right of your 2016 Nissan NV2500 with the 5.6L V8. I've attached a diagram to assist. You will also want to use a thread sealant like # LT37482 or # LT37615. It is not quite as simple as unscrewing the plug and screwing in the heater, but it is close. You will need to drain your cooling system first because the plug gets immersed in coolant. Other than that, it is basically unscrewing and then screwing...
    view full answer...
  • Troubleshooting Air Lift LoadLifter 5000 elbow leaking at swivel
    It is not uncommon to have a leak at the swivel fitting on your Air Lift LoadLifter 5000 Air Springs # AL57338. It usually has to do with the hose not being cut cleanly. I've attached the portion of the installation instructions that deals directly with fixing this leak. My recommendation is to use the Air Lift Air Hose Cutter # AL10530 to ensure a clean cut on the hose. If you need to remove the fitting to reseal it, I recommend the Loctite Thread Sealant 545 # LT37482.
    view full answer...
  • Are there Stainless Steel Wheel Studs for Trailers
    There probably are some stainless steel wheel studs out there somewhere but all the ones we have are either zinc-coated steel or painted steel. If you are having a corrosion problem you might want to consider some thread sealant # LT37482. It will help prevent the treated threads from corroding.
    view full answer...
  • Recommended Thread Sealant for Replacement Exhaust Valve on Roadmaster Brakemaster System
    Roadmaster recommends using liquid thread sealant on any threaded fittings that are not compression fittings on the Replacement Quick Exhaust Valve for Roadmaster BrakeMaster # RM-450601-50. I recommend using the Loctite Thread Sealant 545 - Purple - Non-Contaminating Thread and Pipe Sealer # LT37482.
    view full answer...
  • Air Leaking from Fitting on Firestone Ride-Rite Air Helper Springs
    The first thing you are going to want to do is to take a bottle of soapy water and spray down all of the lines, fittings, and airbags while the system is inflated. There should be bubbles forming where the air is escaping. If air is escaping out of the fitting on top of the airbags then you are going to want to remove it. Once it is removed you would then want to recut the end of the airline with a tubing cutter like part # F9009. Once this is down you can put some thread sealer like part...
    view full answer...
  • How to Remove and Reinstall Push to Connect Air Fittings
    First you will want to completely deflate the airbags. Then to remove the air line from a push to connect fitting like part # F3128-1 you first push the outer metal ring inward and then pull the air line out. You may also need to push in on the air line and then pull out all while holding the metal ring in. It may take a few tries but this is the correct method. Then in order to remove the fitting you will want to place an open end wrench on the hex nut directly above the threads (see photo)....
    view full answer...
  • Fixing Leaky Firestone Ride-Rite Air Bags On A 2006 Toyota Tundra
    Seems like you have the Firestone Ride-Rite Air Helper Springs # F2245. There are a couple things that could be causing the leak. Best case, is that the threaded NPT fittings are leaking. All you would need to do is take them out and apply more Loctite Thread Sealant # LT37482. If that doesn't solve your problem and/or you want to cover all your bases while you have it apart, I would recommend getting new lines and fittings # F2012. If none of this solves your problem then it's time...
    view full answer...
  • Compatibility of Quick Connect Propane Hose and Olympian 3000 Catalytic Heater
    The Camco Quick-Connect to Quick-Connect Propane Hose # CAM57280 can be used with your Olympian 3000 catalytic heater. You will simply need the # CAM59903 adapter for your heater and thread sealant like # LT37482.
    view full answer...
  • Will a Torflex Lift Kit # K71-725-02 Work on an Aluminum Boat Trailer
    There isn't a trailer type restriction for the Torflex Lift Kit # K71-725-02 but there is an axle restriction. To use this kit your axle would have to be a Dexter #12 Torflex axle. And it can't be used if the brackets the axle is attached to now are 3 inches tall. There isn't any specific galvanic corrosion isolator designed for this part but there are many ways you can combat this potential problem. The easiest is probably going to be to apply additional coats of paint so that the metals...
    view full answer...
  • Recommended Propane Connections for Fryer in Food Cart
    To connect your 40 lb portable propane tank, you will want the MB Sturgis Propane Pigtail - Stainless Overbraid # 100833-15. Then you will want the MB Sturgis Horizontal 2-Stage Propane Regulator - 11" Water Column Outlet # 108221. We do not have the adapter for the 3/4 inch NPT as that is not typical for RV use, so you will need to get a hose from a local home improvement store that has an adapter to the 1/4 inch male pipe thread to connect to the regulator. That combination will...
    view full answer...
  • Best Way to Tap Into The Factory Transmission Pan on a 2012 Ford F-150
    The mounting hole size for the Derale Universal Drain Plug Kit for Transmission Pan Coolers part # D13010 is 1/2" and the inlet thread size is 1/8". If you are looking to install a sending unit on an aluminum transmission pan, I recommend using the Derale 3/8" NPT Female Aluminum Weld Bung part # D98002 and having a professional certified welder tig weld the bung on for you. From here you can then use a NPT 3/8" to 5/16" reducer to work with your sending unit. Don't forget to use Loctite...
    view full answer...

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Info for this part was:

Written by:
Raymond P
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Matthew S

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