LOCTITE® 242® Medium Strength Threadlocker – Blue, Thixotropic Adhesive, 50ml
LOCTITE® 242® is a medium-strength, thixotropic threadlocker designed for locking and sealing threaded fasteners that require normal disassembly with hand tools. This blue, one-component adhesive cures in the absence of air and offers excellent resistance to vibration, shock, and leakage. It is ideal for use on less active substrates, such as plated surfaces, and is tested to military specification Mil-S-46163A. LOCTITE® 242® provides reliable performance in a wide range of applications, including automotive, industrial, and maintenance sectors.
Product Name: LOCTITE® 242®
Technology: Acrylic Dimethacrylate Ester
Appearance (Uncured): Blue Liquid
Fluorescence: Positive under UV light
Viscosity:
- Brookfield RVF, 25°C, mPa·s (cP):
- Spindle 3, speed 2 rpm, Helipath ≥5,000
- Spindle 3, speed 20 rpm, Helipath 800 to 1,600
- Brookfield RVT, 25°C, mPa·s (cP):
- Spindle 3, speed 20 rpm 900 to 1,400
Cure Type: Anaerobic (requires absence of air)
Components: One component – requires no mixing
Application: Threadlocking, suitable for normal disassembly with standard hand tools
Strength: Medium
Key Features & Benefits:
- Primary Use: Designed for locking and sealing of threaded fasteners subject to normal disassembly.
- Suitable Substrates: Less active substrates such as plated surfaces.
- Prevents: Loosening and leakage from shock and vibration.
- Thixotropic Nature: Reduces migration of the product after application.
- Military Specification: Tested to Mil-S-46163A (regional approval).
Curing Performance:
- Cure Speed vs. Substrate: Cure rate depends on the substrate (e.g., steel, stainless steel, zinc dichromate).
- Cure Speed vs. Temperature: Cure time varies with temperature.
Typical Performance of Cured Material:
- Breakaway Torque (ISO 10964):
- 3/8 x 16 steel nuts (Grade 2) and bolts (Grade 5): 5.6 to 17 N·m (50 to 150 lb.in) after 24 hours at 22°C.
- Prevail Torque (ISO 10964):
- 3/8 x 16 steel nuts (Grade 2) and bolts (Grade 5): 1.7 to 6.8 N·m (15 to 60 lb.in) after 24 hours at 22°C.
Environmental Resistance:
- Heat Aging: Remains effective at temperatures from -40°C to 150°C.
- Chemical Resistance: Offers excellent resistance to motor oil, gasoline, brake fluid, water/glycol, and DEF (AdBlue®).
- Not Recommended: Not for use in pure oxygen or oxygen-rich systems, or as a sealant for chlorine or strong oxidizing materials.
Usage Instructions:
- Surface Preparation: Clean surfaces with a LOCTITE® cleaning solvent.
- Application: Shake the product well before use. Apply to threads or bonding surfaces.
- For Sealing Applications: Apply a 360° bead to male fitting threads.
- Disassembly: Remove with standard hand tools, or apply heat (250°C) for difficult cases.
Storage Instructions:
- Store in a dry location at optimal temperatures of 8°C to 21°C.
- Avoid storage below 8°C or above 28°C to prevent product degradation.
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