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

This stuff will seal up pretty much any fitting. It worked on some cheap worn out AC recharge hoses that had messed up seals, they sealed up and held a vacuum.

The sealant works well no issues, don't know if it's needed but cheap insurance none the less

Two times I had to reflare a half inch line of a line set for a mini split. Could not get it to seal. It had been 30 years since I had to flare some tubing but I never had a problem before. My neighbor with 25 years experience with high pressure lines and fuel systems could not get his three attempts to reflare and seal. Retired HVAC neighbor three times, could not get it to seal! Heard about this product. Applied it to the inside of the flare and the male part of the flare tightened it together pressurized, then vacuumed the system. No problem! Save yourself the misery even if you only use it once or twice the couple of bucks is worth it. And a neighbor just might need it sometime too....

Works great

Works well on flares and fittings

Great

This works great and had no leaks installing my new mini split.

Great stuff. Should have made a smaller bottle