Loctite 565 PST Thread Sealant – 50 ml Tube | High-Viscosity, Low-Strength

Loctite 565 PST is a one-component, high-viscosity acrylic thread sealant formulated to lock and seal metal pipe threads up to 2″ diameter. It cures anaerobically in the absence of air, forming a resilient, leak-proof bond that resists loosening from shock and vibration. Its thixotropic paste stays in place during installation yet fills fine gaps, replacing tapes and conventional dopes for faster, cleaner assemblies. Ideal for pneumatic, hydraulic, and fuel fittings in industrial, automotive, and marine systems.

Key benefits

High-viscosity paste stays put on vertical or overhead joints

Low-strength formula permits hand-tool disassembly when needed

Wide temperature range: −65 °F to +300 °F (−54 °C to +149 °C)

Shear strength: 145 psi; Tensile strength: 25 psi

50 ml squeeze tube for precise, mess-free application

Typical applications

Pneumatic line fittings and connectors

Hydraulic valves and manifolds

Fuel and oil pipeline assemblies

Marine and marine-grade hose fittings

Any metal-to-metal pipe thread requiring leak-proof seal