Nylog Blue is an elastic fluid made from synthetic refrigeration grade compressor oil. Nylog Blue is fully miscible and compatible with all system refrigerants and oils. Gaskets coated with Nylog will never dry or become heat fixed to the surface. Threaded connections coated with Nylog will block high pressure leaks by forming a hydraulic seal. Nylog can be used an assembly lube when installing shaft seals, o-rings, schrader valves, ball valves, or other internal system components.