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

Product ID: 2422417

Details

Brand
Loctite
Item Weight
1.6 ounces
Item dimensions L x W x H
6.25 x 2.25 x
Material
Sealant
Style
Industrial

🔧36 ml precision volume

⏱️Fast 5-min initial set

🛠️Particle-free, clog-proof

€ 60.28

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Description

🔩 Seal it tight, work smart — never settle for leaks again!

RAPID INITIAL SET TIME - Begins curing within 5 minutes, speeding up your workflow without compromising reliability.
CONTROLLED LOCKING STRENGTH - Locks threads securely yet allows easy disassembly when maintenance calls.
VERSATILE HIGH PRESSURE SEALANT - Trusted for hydraulic, brake, transmission, and PTO fittings in demanding environments.
CLEAN FORMULA ZERO CONTAMINATION - No fillers or particles to foul valves or clog filters—pure performance every time.
PRECISION VOLUME FOR PROFESSIONAL USE - Compact 36 ml bottle designed for exact application without waste.

The LOCTITE 545 Pneumatic/Hydraulic Thread Sealant is a 36 ml industrial-grade liquid designed to lock and seal high-pressure pneumatic and hydraulic fittings. Its particle-free formula prevents contamination and clogging, curing reliably on 'as received' fasteners within minutes. Ideal for professionals seeking durable, vibration-resistant seals in automotive and industrial applications.

Specifications

ASIN	B003XZB54O
Best Sellers Rank	#5,835 in Automotive ( See Top 100 in Automotive ) #27 in Thread Lock Sealers #376 in Oils & Fluids
Brand Name	Loctite
Color	Purple
Compatible Material	Metal
Customer Reviews	4.8 4.8 out of 5 stars (1,035)
Global Trade Identification Number	00079340374829
Included Components	(1) LOCTITE 545 Pneumatic/Hydraulic Pipe Thread Sealant \| Purple, 36 ml Bottle
Item Dimensions	6.25 x 2.25 x 1.1 inches
Item Form	Liquid
Item Type Name	automotive-thread-lock-sealers
Item Weight	1.6 ounces
Manufacturer	Loctite
Material Type	Sealant
Model	492145
Number of Items	1
Part Number	492145
Style Name	Industrial
Surface Recommendation	Miscellaneous
UPC	079340374829
Unit Count	1.21 Fluid Ounces
Water Resistance Level	Not Water Resistant

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€ 60.28

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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