Loctite 263 – Threadlocker

Loctite 263 is a high-strength, red anaerobic threadlocker designed to permanently lock and seal threaded metal fasteners. It cures in the absence of air when confined between close-fitting metal threads, creating a durable bond that prevents loosening caused by vibration, shock, and thermal cycling. It also protects threaded assemblies from corrosion, moisture, and fluid leakage, ensuring long-term reliability in demanding industrial and automotive applications.

Loctite 263 is formulated for heavy-duty fastening applications where maximum holding power is required. It provides excellent performance on active metals such as steel and brass, as well as passive metals including stainless steel and plated surfaces. The product also offers good oil tolerance, allowing reliable curing on fasteners with light surface contamination.

Once cured, Loctite 263 creates a permanent bond that generally requires localized heat and suitable tools for disassembly. This makes it ideal for critical assemblies where fastener movement is unacceptable.

Key Features

• High-strength anaerobic threadlocker
• Permanently locks and seals threaded metal fasteners
• Prevents loosening caused by vibration and shock
• Excellent adhesion to steel, stainless steel, brass, and plated metals
• Tolerates light oil contamination on threaded parts
• Protects against corrosion and thread leakage
• Resistant to oils, fuels, coolants, and many industrial chemicals
• Suitable for high-load and high-vibration applications

Typical Applications

• Engine and transmission fasteners
• Gearboxes and industrial machinery
• Pumps and compressors
• Heavy equipment and construction machinery
• Stud bolts and structural fasteners
• Electric motors and power transmission equipment
• Automotive and industrial maintenance

Benefits

• Provides permanent fastener locking for critical assemblies
• Increases equipment reliability and operational safety
• Reduces maintenance and unplanned downtime
• Protects threads from corrosion and environmental exposure
• Extends the service life of mechanical assemblies

Loctite 263 is a trusted high-strength threadlocking solution for manufacturers and maintenance professionals who require permanent fastening, superior vibration resistance, and long-lasting performance in demanding industrial and automotive environments.