

🛠️ Seal it right, every time — because your work deserves the best!
RT201B Nylog Gasket/Thread Sealant is a 30 ml professional-grade product designed to seal flares and threaded connections while lubricating O-rings and gaskets. OEM-approved and highly rated by mechanics, it prevents refrigerant leaks and ensures durable, contamination-free system assembly. Compact and cost-effective, it’s the go-to sealant for both pros and DIY enthusiasts aiming for flawless A/C repairs.
| ASIN | B008HOSQQQ |
| Best Sellers Rank | #1,412 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Industrial Thread Sealants |
| Date First Available | July 5, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.8 ounces |
| Item model number | RT201B |
| Manufacturer | Refrigeration Technologies |
| Product Dimensions | 1 x 1 x 0.5 inches |
A**S
Best sealant and lubricant for vac
I am a fleet mechanic and I am constantly doing on a/c repairs on our vehicles. You can definitely use dielectric grease if you want, but if you really take pride in your work and want to do it right NYLOG is the way to go. I have stopped leaking schrader valves and fittings from releasing refrigerant into the atmosphere. This stuff just works. Our parts guys now keep this in stock in large quantities just for me. The other mechanics have started using this product instead of silicone grease and are just as happy with it. This stuff is great if you are a professional or a DIY'er.
S**E
Helps reduce AC flange connection leaks
Helps prevent leaks on AC flange fittings. Works well, less expensive than others I've used, but seems to be same or very similar product. If doing AC work I'd recommend.
C**D
Works great
Great product and goes along ways
M**E
Works as needed
Worked as a good sealer. No leaks detected after fairing the ends and connecting them together.
A**R
Sealer
Very wise to use this when installing mini split units.
T**S
Very versatile
I'm on my second bottle of this stuff and I just love it for sealing my connections it's just a insurance policy to make sure that you don't leak all your Freon out it's a wonderful product
O**R
Excellent product
Super product
L**C
A must-have for flare fittings
For anyone who needs to assemble flare fittings (very common with ductless mini-split heat pumps and vintage automotive air conditioning systems) you really owe it to yourself to get a bottle of this. You only need a couple drops per connection, but this stuff works wonders. HVAC installers know that flare fittings are a very common point of failure in HVAC systems, but this product helps tremendously. It allows the pieces to move around just a little when assembling them, which allows you to easily find that "spot" where the flare sits just right on the fitting. This product also lubricates the threads and the interface between the pipe and the collar, which makes torquing the connection easier, and with very little change of damaging the flare (also a common problem with this type of connection). I think this is well worth the cost.
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