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Loctite 37482 545 Pneumatic/Hydraulic Thread Sealant Bottle - 36 ml

Q: does this dry hard/solid? can parts be removed after? i want to use this to install oil sensors in my car. thanks.

Dries semi hard but hard enough that you can leave a fingernail imprint. it's not difficult to disassemble anything. I really like this stuff

Q: Will it seal even with small amount of hydraulic fluid present? Just incase I can't get it all cleaned out of the female threads,

For LOCTITE 545 clean as much as possible in order to have the best possible result. I would recommend testing it in order to see how it behaves for your application. Also 545 is ideal for hydraulic system because it has no fillers so it will not contaminate.

Q: Can I use this on the outside of a threaded line that is slowly leaking? Or only on the threads as it’s screwed in to prevent leaks?

To my knowledge it will only work if you put it inside the threads - as you are assembling it. And it works pretty well doing that. Worked on a 3000+ psi hydraulic connection that was continually leaking.

Q: I have a compressor tee fitting that I can't fully tighten to keep it oriented properly. Will this seal that fitting?

It probably will for a while , but it will leak again . If the fitting is loose you could try teflon tape or you could try to tap the hole out a little and try to turn the fitting one complete turn to get it to tighten up.

Product ID: 2422417

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Details

Brand
Loctite
Specific Uses For Product
Fleet and
Material
Sealant
Item Form
Liquid
Color
Purple

🔒High-pressure lock & seal

⏱️Fast cure on ready fasteners

⚙️Particle-free purity

Description

🔧 Seal it tight, drive with confidence!

INSTANT READINESS - Cures reliably on 'as received' fasteners—no prep delays.
ZERO CONTAMINATION FORMULA - No fillers or particles to clog or foul your critical system components.
VERSATILE VEHICLE SPECIFIC FIT - Perfectly tailored for hydraulic lines, brake fittings, transmissions, and PTOs.
COMPACT EFFICIENT 36 ML BOTTLE - Portable size designed for precision application without waste.
UNBREAKABLE SEAL FOR HIGH PRESSURE SYSTEMS - Locks and seals pneumatic & hydraulic fittings with industrial strength.

Loctite 37482 545 is a 36 ml pneumatic and hydraulic thread sealant engineered to lock and seal high-pressure fittings without contaminating system fluids. Its particle-free formula ensures no clogging or fouling of valves and filters, curing quickly on fasteners as received. Ideal for vehicle-specific hydraulic, brake, transmission, and PTO fittings, this compact bottle delivers professional-grade reliability in every drop.

Specifications

Manufacturer	Loctite
Brand	Loctite
Model	545 Pneumatic/Hydraulic Pipe Thread Sealant
Item Weight	2.88 ounces
Product Dimensions	6.25 x 2.25 x 1.1 inches
Item model number	492145
Is Discontinued By Manufacturer	No
Manufacturer Part Number	492145
OEM Part Number	37482
National Stock Number	2590-01-557-0288

Have a Question? See What Others Asked

does this dry hard/solid? can parts be removed after? i want to use this to install oil sensors in my car. thanks.

Will it seal even with small amount of hydraulic fluid present? Just incase I can't get it all cleaned out of the female threads,

Can I use this on the outside of a threaded line that is slowly leaking? Or only on the threads as it’s screwed in to prevent leaks?

I have a compressor tee fitting that I can't fully tighten to keep it oriented properly. Will this seal that fitting?

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