VIPER Nylog Blue Gasket & Thread Sealant is a high-performance, synthetic refrigeration-grade fluid designed for sealing flare and threaded connections. Compatible with all system refrigerants and oils, Nylog Blue lubricates O-rings and gaskets while preventing contamination in refrigeration systems. Its elasticity ensures a secure, leak-free seal, making it ideal for professional use. Approved by OEM manufacturers, this versatile sealant offers superior performance and reliability for a wide range of HVAC and refrigeration applications.