LOCTITE® 243 Blue Medium Strength Threadlocker
LOCTITE® 243 is a general-purpose, medium-strength threadlocker that provides reliable locking and sealing of threaded metal fasteners. This blue-colored anaerobic adhesive prevents loosening due to vibration and shock while allowing standard hand tool disassembly when needed.
Key Features
- Medium Strength Bond: Ideal for fasteners requiring periodic maintenance or disassembly
- Universal Metal Compatibility: Works on all metals including passive substrates such as stainless steel, aluminum, and plated surfaces
- Oil Tolerant: Proven to tolerate minor contamination from industrial oils including motor oils, corrosion prevention oils, and cutting fluids
- Primerless Performance: Functions effectively on both active and passive metals without requiring primer
- Temperature Resistant: Operating temperature range from -55°C to +180°C (-67°F to +356°F)
Performance Specifications
- Cure Time: Sets in 10 minutes, full strength in 24 hours
- Shear Strength: 1100 psi
- Tensile Strength: 230 psi
- Suitable for Fasteners: 1/4" to 3/4" (6mm to 20mm) diameter
Technical Properties
- Blue color for easy identification
- Anaerobic curing – cures in the absence of air between close-fitting metal surfaces
- Thixotropic consistency prevents migration after application
- NSF P1 Registered (Registration No. 123000)
Ideal for securing components in automotive, industrial, and maintenance applications where medium-strength thread locking is required with the ability to disassemble using standard hand tools.