Pratley Pratlok Studlock Grade 20+

Pratley Pratlok Grade 20+ Studlock is a high-strength, high-viscosity red anaerobic adhesive designed to permanently lock and seal threaded fasteners larger than M20, flanged assemblies, and fill gaps. 

Key Properties & Specifications

• Colour / Appearance: Red and U.V. fluorescent (enables inspection under black light). 

• Recommended Thread Size: Typically for threads greater than M20. 

• Viscosity: High viscosity (6000–8000 mPa.s) with gap-filling capability (maximum gap 0.05 to 0.25 mm). 

• Strength: High static shear (11–23 N/mm²) and high breakaway torque (10–40 N.m). 

• Cure Time: Initial set in 16 to 26 minutes; full cure in 24 hours. 

• Temperature Range: Continuous temperature rating up to 150°C. 

• Disassembly: Difficult; typically requires localized heating (over 250°C) to break the bond. 

Common Applications

• Securing heavy-duty studs, large bolts, and threaded pipe fittings.

• Locking slip-fitted or press-fitted mechanical parts like cylindrical joints, bearings, and shafts.

• Sealing flanged connections to prevent leakage and galvanic corrosion