Top Pick Loctite® 545™ Thread Sealant is a pipe sealant designed for the locking and sealing of metal pipes and fittings. This product is specially formulated to offer high lubricity for easy assembly and removal. Recommended for fine threaded fittings as used in hydraulic and pneumatic installations and small fittings in general. It contains no fillers or particles that could contaminate system fluids, foul valves, or clog fine filters and screens. Suitable for fittings up to 2 in. (50 mm) in diameter including pneumatic and hydraulic fittings. Excellent solvent resistance. ABSSM Approved. CFIA Approved.