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Loctite 37482 545 Pneumatic/Hydraulic Thread Sealant Bottle, 36-Milliliter

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: 302072216

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Details

Brand
Loctite
Specific Uses For Product
Fleet and
Material
Sealant
Compatible Material
Metal
Item Form
Liquid

🔧36 ml precision volume

🚗OEM-approved for vehicle-specific fit

⚙️No fillers, zero contamination

Description

🔩 Seal like a pro, drive with confidence!

TRUSTED OEM QUALITY - Tested and approved by leading auto manufacturers
FAST RELIABLE CURING - Cures directly on 'as received' fasteners for instant readiness
VERSATILE VEHICLE APPLICATIONS - Perfect for brake, transmission, PTO, and hydraulic fittings
CLEAN FORMULA ZERO CONTAMINATION - No fillers or particles to foul valves or clog filters
PRECISION SEAL FOR HIGH PRESSURE SYSTEMS - Locks and seals pneumatic & hydraulic threads flawlessly

Loctite 37482 545 is a 36 ml high-performance pneumatic and hydraulic thread sealant designed for locking and sealing high-pressure vehicle systems. Its clean, particle-free formula prevents contamination and clogging, curing reliably on untreated fasteners. OEM-approved and trusted by professionals, it’s ideal for brake, transmission, PTO, and hydraulic line fittings, ensuring durable, maintenance-friendly sealing.

Specifications

Brand	Loctite
Specific Uses For Product	Fleet and plant maintenance.
Material	Sealant
Compatible Material	Metal
Item Form	Liquid
Special Feature	Clean Formula
Colour	Purple
Item Package Quantity	1
Package Information	Bottle
Item Volume	36 Millilitres
Viscosity	Low
Water Resistance Level	Not Water Resistant
Net Quantity	1.21 millilitre
UPC	079340374829
Global Trade Identification Number	00079340374829
Manufacturer	Loctite
Model	545 Pneumatic/Hydraulic Pipe Thread Sealant
Product Dimensions	15.88 x 5.72 x 2.79 cm; 45.36 g
Item model number	37482
Exterior	Machined
Manufacturer Part Number	492145
OEM Part Number	37482
Outer Material	other
Assembly Required	No
Special Features	Clean Formula
Item Weight	45.4 g

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?

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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1118 DH

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Moroccostore

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago