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LOCTITE37482 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.

4.7/5

Product ID: 262555009

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Details

Brand
LOCTITE
Specific uses for product
Material
Sealant
Compatible material
Metal
Item form
Liquid

💧Waterproof formula

🔒High-pressure lock & seal

⚙️Particle-free, no clogging

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Description

🔧 Lock it down, seal it tight — no leaks, no limits!

FAST RELIABLE CURE - Cures directly on 'as received' fasteners, saving time and ensuring dependable performance every time.
COMPACT LIGHTWEIGHT - 36ml bottle with a sleek design (15.88 x 5.72 x 2.79 cm, 45.4g) fits perfectly in your toolkit for on-the-go fixes.
PRECISION LOCKING POWER - Engineered for secure sealing in high-pressure pneumatic and hydraulic systems without compromising disassembly ease.
VERSATILE INDUSTRIAL USE - Ideal for hydraulic line fittings, brake systems, transmission fluid connections, and PTO fittings—your go-to sealant for critical applications.
CLEAN CONTAMINATION FREE - Formulated with zero fillers or particles to keep system fluids pure and prevent valve fouling or filter clogging.

Loctite 37482 545 is a 36ml waterproof thread sealant designed specifically for high-pressure pneumatic and hydraulic systems. It locks and seals fasteners without fillers or particles, preventing contamination and clogging, while curing reliably on untreated fasteners. Perfect for critical applications like brake fittings and hydraulic lines, it offers controlled locking strength for easy disassembly and long-lasting performance.

Specifications

Manufacturer	Loctite
Brand	LOCTITE
Product Dimensions	15.88 x 5.72 x 2.79 cm; 45.36 g
Item model number	37482
Manufacturer Part Number	492145
OEM Part Number	37482
Special Features	Waterproof
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?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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$317

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