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

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.

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.

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.

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Description

🔧 Seal it tight, perform right — don’t let leaks slow your flow!

FAST RELIABLE CURE - Cures directly on 'as received' fasteners for quick, hassle-free maintenance.
OEM APPROVED QUALITY - Trusted by top automotive manufacturers for professional-grade performance and durability.
VERSATILE APPLICATION - Perfect for hydraulic lines, brake fittings, transmission fluid, and PTO connections—fleet-ready.
PRECISION LOCKING POWER - Engineered to secure high-pressure pneumatic and hydraulic fittings with unmatched reliability.
CONTAMINANT FREE FORMULA - No fillers or particles to clog valves or filters—keeping your system pristine and efficient.

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

Specifications

Brand	Loctite
Specific Uses For Product	Fleet and plant maintenance.
Material	Sealant
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 Fluid Ounces
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
Country of Origin	USA
Item Weight	45.4 g

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