Vibra-TITE 446 High Pressure Refridgerant Anaerobic Thread Sealant, 1 liter Jug, Red Seals and secures metal pipes and fittings; fills the space between threaded metal parts Prevents leakage caused by tape shredding, vibration loosening, solvent evaporation or damaged threads Prevents corrosion and galling of threads Low and high pressure applications; seals to the burst strength of most piping systems Facilitates assembly