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.

Loctite 37482 545 Pneumatic Hydraulic Thread Sealant Bottle 36 Milliliter

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

🔧 Seal like a pro, perform like a boss.

CONTROLLED DISASSEMBLY - Locks tight but allows easy maintenance with reliable curing on 'as received' fasteners.
PRECISION LOCKING POWER - Engineered to secure high-pressure pneumatic and hydraulic fittings without fail.
OEM APPROVED RELIABILITY - Trusted by top auto manufacturers for consistent, professional-grade sealing.
VERSATILE APPLICATION RANGE - Perfect for hydraulic lines, brake fittings, transmission fluid, and PTO connections.
CLEAN FORMULA ZERO CONTAMINATION - No fillers or particles to foul valves or clog filters—pure performance every time.

Loctite 37482 545 is a 36 ml high-performance pneumatic and hydraulic thread sealant designed for professional-grade locking and sealing of high-pressure vehicle fittings. Its particle-free formula prevents contamination and clogging, cures reliably on ready fasteners, and is OEM-approved for trusted use in hydraulic, brake, transmission, and PTO systems.

Specifications

ASIN	B003XZB54O
Best Sellers Rank	#55,150 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #46 in Adhesive Caulk
Brand	Loctite
Brand Name	Loctite
Colour	Purple
Compatible Material	Metal
Country of Publication	USA
Customer Reviews	4.7 out of 5 stars 966 Reviews
Global Trade Identification Number	00079340374829
Included Components	(1) LOCTITE 545 Pneumatic/Hydraulic Pipe Thread Sealant \| Purple, 36 ml Bottle
Item Dimensions	15.9 x 5.7 x 2.8 Centimeters
Item Form	Liquid
Item Type Name	automotive-thread-lock-sealers
Item Weight	0.1 Pounds
Item dimensions L x W x H	15.9 x 5.7 x 2.8 Centimeters
Manufacturer	Loctite
Manufacturer Part Number	492145
Material	Sealant
Material Type	Sealant
Model	492145
Number of Items	1
Style	Industrial
Style Name	Industrial
Surface Recommendation	Miscellaneous
UPC	079340374829
Unit Count	1.21 Fluid Ounces
Water Resistance Level	Not Water Resistant

Reviews

M**M

Tired of hydraulic fluid dripping on my boot

26.09.2025

M**T

Works great.

8.02.2026

J**L

Impresionado

Después de darle servicio a mi compresor, no encontraba la manera de que no tuviera fugas de aire. Intente con tanto Teflon como pude, incluso sus variantes industriales pero nada conseguía sellarlo. Probé con este producto, no teniendo muchas expectativas realmente y mi sorpresa fue que ahora no tengo ninguna fuga. Es importante mencionar que si se debe de dejar secar al menos lo que indica el producto (24 horas) aun que por el clima frío lo deje una semana. Lo recomiendo TOTALMENTE.

29.01.2020

M**B

Buen producto

5.12.2020

B**N

No more leaks

10.04.2025

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