Loctite 572

LOCTITE® 572 is a one-component, medium strength, anaerobic thread sealant designed for the locking and sealing of metal pipes and fittings. It cures when confined in the absence of air between two metal surfaces, prevents loosening under shock and vibration and provides sealing. It is a white to off-white, high viscosity thixotropic dimethacrylate ester paste; its thixotropic nature reduces migration of the product after application. Where cure speed is too slow or gaps are large, secondary cure is achieved with Activator 7471™ or 7649™.

Typical Properties

• Specific gravity (25 °C) 1.25
• Viscosity (Brookfield RVT, spindle 6): 28,800–77,000 mPa·s at 2.5 rpm, 14,400–28,600 mPa·s at 20 rpm
• After 24 hours (M10 steel bolts and nuts) breakaway torque 7 N·m; prevail torque 3 N·m
• Pre-torqued to 5 N·m: breakloose torque 20 N·m; max prevail torque 20 N·m
• Compressive shear strength on steel pins and collars 0.5 N/mm² (ISO 10123)

Use

• Apply 360° to the male threads, leaving the first thread free; for coarse threads and large gaps also apply to the female threads
• Properly tightened joints give instant sealing against moderate pressures
• Not for use in pure oxygen or oxygen rich systems or with chlorine or strong oxidizing materials; not recommended on plastics