When doing a ductless AC system do you put this on the inside and outside of the flair or only on the threads?

This stuff is great. You don't put it on the thread, it goes on the flair. It's not like lock tite it's a flair tight. I'm a diu girl and this is great stuff. I used it a year ago and I still have great ac. Before using it I could not hold a vacuum on my system.

Will this work with propane gas lines

Having not used it, can't say 100%. But since R290 is purified propane, and this says it's for all refrigerants, I don't see why not. Though there may be additives in propane meant for heating that could possibly interact with it. Certainly propane for heating is not as pure as the refrigeration stuff. As someone else mentioned, asking the manufacturer is probably a good idea before trying.

can this be used to seal service valve caps?

I don't believe I would use it for that purpose. If it gets into the valve it would probably keep the valve from working properly. I generally use brass caps with o-rings to seal service valve ports.

Would NYLOG blue seal a slow rim leak in a tubeless tire?

I would think so.....but an expensive way to seal a tire....cleaning the rim bead with a wire wheel should do it.

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Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant, 30 ml (1 Pack)

Product ID: 593544130

Details

Brand
Refrigeration
Material
Nylon
Colour
Blue
Shape
Round
UPC
330051886132

✅OEM-approved for guaranteed system safety

🧴30 ml precision applicator for exact use

🛠️Seals flares & threaded connections flawlessly

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€ 37.55

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Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧊 Seal smart, work sharp — the pro’s choice for leak-proof systems!

TRUSTED BY OE MS - Approved by top manufacturers for professional-grade reliability
COMPACT EFFICIENT - 30 ml pack designed for precise application without waste
FLAWLESS SEAL EVERY TIME - Expertly seals flares and threaded connections to prevent leaks
SMOOTH ASSEMBLY LUBRICATION - Lubricates O-rings and gaskets for easy, damage-free installation
CONTAMINATION FREE CONFIDENCE - Won't compromise your refrigeration system's integrity

Refrigeration Technologies RT201B Nylog Gasket/Thread Sealant is a 30 ml OEM-approved sealant and assembly lubricant designed to protect refrigeration systems by sealing flares and threaded connections without contamination. Compact and efficient, it lubricates O-rings and gaskets to ensure smooth installation and long-lasting performance.

Specifications

Asin	B008HOSQQQ
Best Sellers Rank	#33,885 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #224 in Hardware Sealers
Item Model Number	RT201B
Manufacturer	Refrigeration Technologies
Product Dimensions	2.54 x 2.54 x 1.27 cm; 22.68 g

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