Loctite 5452 Fast Cure Thread Sealants Contains no fillers or particles that could contaminate system fluids, foul valves or clog fine filters and screens. Designed for hydraulic and pneumatic fittings. Suitable for large diameter pipes. Cures rather than dries, so it won't shrink or crack, thus eliminating leak paths and ensuring complete contact between the threads for a complete seal. Prevents corrosion and galling in threads Pack of 1