Medium Strength, Removable | For 1/4"–3/4" Fasteners | Sold as a Case of 24 Bottles

SONLOK 3242 is a fast-curing, medium-strength anaerobic thread locking compound formulated for locking and sealing threaded fasteners while remaining removable for service and maintenance. Designed for ¼" to ¾" (6–20 mm) bolts, this blue threadlocker provides reliable vibration resistance and chemical durability across a wide range of industrial applications.
Packaging: 50ml bottles, sold by the case of 24.

Manufactured by Parson Adhesives, SONLOK 3242 cures in the absence of air when confined between metal surfaces, delivering dependable locking performance with controlled friction and consistent torque/tension during assembly. It meets the majority of general-purpose nut-and-bolt requirements and carries applicable military specifications.

Key Features & Benefits

• Medium-strength anaerobic thread locker (removable)
• Fast cure with dependable vibration resistance
• Blue color for easy identification
• Locks and seals threaded joints (nuts, screws, studs)
• Excellent resistance to heat, water, oils, fuels, and chemicals
• Meets 90% of common nut & bolt thread-locking applications
• Complies with MIL-S-46163 Type II Grade N and MIL-S-22473E Letter Grade CVV

Typical Applications

• Thread locking plated parts and moving components
• Fasteners exposed to vibration
• General industrial assembly and maintenance
• Bolts and studs requiring future disassembly

Comparable To

SONLOK 3242 is commonly used as an alternative to:

• Loctite® 242 Medium Strength Threadlocker by Henkel Loctite

It offers comparable medium-strength, removable performance for general-purpose thread locking.

Adhesive Properties

Composition: Methacrylate Ester
Color: Blue
Viscosity: 1,200 cps @ 25°C
(Brookfield RVT, Spindle 3 @ 20 rpm)
Specific Gravity: 1.07
Maximum Thread Size / Gap Fill: M36 / 1½" / 0.20 mm
Flash Point: >100°C
Shelf Life: 2 years

Curing Properties

Handling Cure Time: ~10 minutes
Functional Cure Time: 1–3 hours
Full Cure Time: 24 hours

Breakaway Torque (ISO 10964):
• 3/8"-16 steel: 8–17 N·m (70–150 lb·in)
• 3/8"-16 cadmium: 1–7 N·m (10–60 lb·in)
• 3/8"-16 zinc: 2–7 N·m (20–60 lb·in)
• M10 black oxide steel: 8–19 N·m (71–168 lb·in)

Prevail Torque (ISO 10964):
• 3/8"-16 steel: 3–7 N·m (25–60 lb·in)
• 3/8"-16 cadmium: 1–5 N·m (4–40 lb·in)
• 3/8"-16 zinc: 1–4 N·m (10–40 lb·in)

Service Temperature Range: −55°C to 150°C

Physical Properties

• Coefficient of Thermal Expansion: 80 × 10⁻⁶ (ASTM D696)
• Thermal Conductivity: 0.10 W/(m·K) (ASTM C177)
• Specific Heat: 0.30 kJ/(kg·K)

Chemical Resistance

(% Initial Strength Retained)

Application Instructions

• Ensure threads are clean, dry, and free of contaminants
• Apply sufficient product to fill threads
• Best performance achieved in thin bond gaps
• Designed to deliver controlled friction and consistent torque/tension

Packaging & Storage

• Package Size: 50ml bottles
• Selling Unit: Case of 24 bottles
• Store unopened containers in a cool, dry place
• Ideal storage temperature: 46°F–82°F (8°C–28°C)
• Do not return unused material to the original container

SONLOK 3242 delivers reliable medium-strength thread locking with removability, chemical resistance, and vibration protection, making it a proven alternative to Loctite 242—now conveniently available by the case of 24 for professional and industrial use.