LOCTITE® 5772 is a yellow, medium strength, thixotropic thread sealant designed for locking and sealing metal threaded pipes and fittings up to 80 mm (3″). Its dimethacrylate ester formula contains low sulphur and halogen, making it safe for use with sensitive metals including titanium and stainless steel without requiring primer. It cures reliably in confined spaces to prevent leaks and loosening from vibration and shock.
LOCTITE® 5772 is a single component, anaerobic adhesive that cures between close fitting metal threads in the absence of air. This results in a robust seal suitable for demanding applications, especially in the nuclear and industrial sectors. Its thixotropic viscosity makes application easy and clean, with minimal migration post application. It delivers dependable performance on sensitive metals without primer, and assures thread-locking and sealing in pressurised systems.
Colour: Yellow liquid
Viscosity: 16 000–33 000 mPa·s at 36 s⁻¹ (Haake cone & plate)
Specific gravity: 1.09 at 25 °C
Breakaway torque: M10 stainless steel after 24 h – ~6.4 N·m; with carbon steel ~17 N·m
Prevail torque: stainless steel ~3.4 N·m; carbon steel ~6 N·m after 24 h
Cure: starts in 15 min on brass; fastest reach 75% strength in 30 min; stainless steel ~48 h without primer—accelerated with primer
Service temperature: –55 °C to +150 °C
Packaging: 50 ml bottle
Primary Chemistry: Methacrylate ester
Ensures reliable sealing and prevents loosening in threaded pipe and fitting assemblies Eliminates risk of contamination or corrosion from aggressive additives Supports maintenance and disassembly without tools, or by applying moderate heat Reduces downtime by providing fast initial sealing and long term bond integrity
Apply a 360° bead to the leading threads (male) of cleaned fittings and tighten to specification. Cure for at least 24 hours for maximum strength, but moderate pressure resistance is achieved instantly. For stainless steel, use Activator 7471 or 7649 to accelerate cure. Disassembly can be achieved by standard tools or applying ~250 °C heat.
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