Loctite 545 Thread Sealant is a pneumatic/hydraulic sealant that contains no fillers or particles that could contaminate system fluids, foul valves, or clog fine filters and screens. Features: Designed for locking and sealing of metal pipes and fittings in high-pressure pneumatic and hydraulic systems. Reliably cures on as received fasteners. Controlled locking strength allows easy disassembly. Specially formulated to offer high lubricity for easy assembly and removal. OEM Specified.