Vibra-TITE 440 Hydraulic and Pneumatic Anaerobic Thread Sealant, 250 ml Bottle, Purple 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